Updated on 2025/10/03

写真a

 
HABA MAKIKO
 
Organization
School of Science Associate Professor
Title
Associate Professor
External link

News & Topics

Degree

  • 博士（理学） ( 2010.3   広島大学 )

Research Interests

  • Extinct nuclides

  • Radiometric dating

  • Meteorites

  • Cosmochemistry

  • Isotopes

Research Areas

  • Natural Science / Space and planetary sciences  / 宇宙地球化学

Education

  • Hiroshima University   Graduate School of Science   Department of Earth and Planetary Systems Science

    2007.4 - 2010.3

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    Country： Japan

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  • Hiroshima University   Graduate School of Science   Department of Earth and Planetary Systems Science

    2005.4 - 2007.3

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    Country： Japan

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  • Hiroshima University   Faculty of Science   Department of Earth and Planetary Systems Science

    2001.4 - 2005.3

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    Country： Japan

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Research History

  • Institute of Science Tokyo   Department of Earth and Planetary Sciences   Associate Professor

    2025.4

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  • Swiss Federal Institute of Technology in Zurich   Institute of Geochemistry and Petrology   Visiting Professor

    2024.7 - 2025.3

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    Country：Switzerland

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  • Tokyo Institute of Technology   Department of Earth and Planetary Sciences, School of Science   Assistant Professor

    2016.10 - 2025.3

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  • ETH Zurich   JSPS fellowship for research abroad

    2015.4 - 2016.9

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    Country：Switzerland

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  • National Institute of Polar Research   Project researcher

    2014.4 - 2015.3

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    Country：Japan

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  • The University of Tokyo   JSPS Research Fellow

    2012.4 - 2014.3

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    Country：Japan

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  • National Institute of Polar Research   JSPS fellow

    2011.4 - 2012.3

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    Country：Japan

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  • National Institute of Polar Research   Project Researcher

    2010.10 - 2011.3

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    Country：Japan

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Professional Memberships

Papers

  • Accretion and Differentiation of Vesta and the Mesosiderite Parent Body Inferred From Ni Stable Isotope Compositions Reviewed

    Ke Zhu, Makiko K. Haba, Qi Chen, Lu Chen

    Geophysical Research Letters   52 ( 19 )   2025.9

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    Publishing type：Research paper (scientific journal)   Publisher：American Geophysical Union (AGU)  

    Abstract

    We present high‐precision Ni stable isotope data for mesosiderites, eucrites, and diogenites to investigate the accretion and differentiation of asteroid 4 Vesta. Ni isotope variations in eucrites and diogenites are dominated by kinetic diffusion and chondritic contamination, rendering them unsuitable for reconstructing Vesta's primitive Ni composition. In contrast, mesosiderites yield an average δ60/58Ni value of 0.119 ± 0.044‰ (2SE), representing the bulk and core Ni isotopic signature of Vesta or the mesosiderite parent body. This value is Earth‐like but distinct from those of chondrites, iron meteorites, and ureilites, suggesting diverse precursor materials and Ni isotope heterogeneity in the early Solar System. Results from pMELTS modeling and the olivine‐rich sample MIL 07001 support magma ocean crystallization as a key evolutionary stage on Vesta. Anomalously high δ60/58Ni in the impact‐melt diogenite NWA 5480 likely reflects evaporation, highlighting a possible new application of Ni isotopes as tracers of planetary volatile loss.

    DOI： 10.1029/2025gl115703

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  • Late fluid flow in a primitive asteroid revealed by Lu-Hf isotopes in Ryugu Reviewed

    Tsuyoshi Iizuka, Takazo Shibuya, Takehito Hayakawa, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Kengo T. M. Ito, Yuki Hibiya, Akira Yamaguchi, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Hiroshi Hidaka, Hisashi Homma, Gary R. Huss, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kazuko Motomura, Frederic Moynier, Kazuhide Nagashima, Izumi Nakai, Ann Nguyen, Larry Nittler, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara Russell, Naoya Sakamoto, Maria Schonbachler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    NATURE   2025.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41586-025-09483-0

    Web of Science

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  • Zirconium isotope composition indicates s‐process depletion in samples returned from asteroid Ryugu

    Maria Schönbächler, Manuela A. Fehr, Tetsuya Yokoyama, Ikshu Gautam, Nao Nakanishi, Yoshinari Abe, Jérôme Aléon, Conel Alexander, Sachiko Amari, Yuri Amelin, Ken‐ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon‐Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming‐Chang Liu, Yuki Masuda, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara Russell, Naoya Sakamoto, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing‐Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai‐Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei‐ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Meteoritics & Planetary Science   2024.11

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Nucleosynthetic isotope variations are powerful tracers to determine genetic relationships between meteorites and planetary bodies. They can help to link material collected by space missions to known meteorite groups. The Hayabusa 2 mission returned samples from the Cb‐type asteroid (162173) Ryugu. The mineralogical, chemical, and isotopic characteristics of these samples show strong similarities to carbonaceous chondrites and in particular CI chondrites. The nucleosynthetic isotope compositions of Ryugu overlap with CI chondrites for several elements (e.g., Cr, Ti, Fe, and Zn). In contrast to these isotopes, which are of predominately supernovae origin, s‐process variations in Mo isotope data are similar to those of carbonaceous chondrites, but even more s‐process depleted. To further constrain the origin of this depletion and test whether this signature is also present for other s‐process elements, we report Zr isotope compositions for three bulk Ryugu samples (A0106, A0106‐A0107, C0108) collected from the Hayabusa 2 mission. The data are complemented with that of terrestrial rock reference materials, eucrites, and carbonaceous chondrites. The Ryugu samples are characterized by distinct 96Zr enrichment relative to Earth, indicative of a s‐process depletion. Such depletion is also observed for carbonaceous chondrites and eucrites, in line with previous Zr isotope work, but it is more extreme in Ryugu, as observed for Mo isotopes. Since s‐process Zr and Mo are coupled in mainstream SiC grains, these distinct s‐process variations might be due to SiC grain depletion in the analyzed materials, potentially caused by incomplete sample digestion, because the Ryugu samples were dissolved on a hotplate only to avoid high blank levels for other elements (e.g., Cr). However, local depletion of SiC grains cannot be excluded. An alternative, equally possible scenario is that aqueous alteration redistributed anomalous, s‐process‐depleted, Zr on a local scale, for example, into Ca‐phosphates or phyllosilicates.

    DOI： 10.1111/maps.14279

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  • The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites

    Fridolin Spitzer, Thorsten Kleine, Christoph Burkhardt, Timo Hopp, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M. O’D Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Mayu Morita, Fréderic Moynier, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Science Advances   10 ( 39 )   2024.9

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    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the accretion disk, possibly around the orbits of Uranus and Neptune. We show that, like for Fe, Ryugu and CI chondrites also have indistinguishable Ni isotope anomalies, which differ from those of other carbonaceous chondrites. We propose that this unique Fe and Ni isotopic composition reflects different accretion efficiencies of small FeNi metal grains among the carbonaceous chondrite parent bodies. The CI chondrites incorporated these grains more efficiently, possibly because they formed at the end of the disk’s lifetime, when planetesimal formation was also triggered by photoevaporation of the disk. Isotopic variations among carbonaceous chondrites may thus reflect fractionation of distinct dust components from a common reservoir, implying CI chondrites/Ryugu may have formed in the same region of the accretion disk as other carbonaceous chondrites.

    DOI： 10.1126/sciadv.adp2426

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  • Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration

    Hiroharu Yui, Shu hei Urashima, Morihiko Onose, Mayu Morita, Shintaro Komatani, Izumi Nakai, Yoshinari Abe, Yasuko Terada, Hisashi Homma, Kazuko Motomura, Kiyohiro Ichida, Tetsuya Yokoyama, Kazuhide Nagashima, Jérôme Aléon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon Gak Choi, Nicolas Dauphas, Andrew M. Davis, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Peter Hoppe, Gary R. Huss, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Sasha Krot, Ming Chang Liu, Yuki Masuda, Frédéric Moynier, Ann Nguyen, Larry Nittler, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Tommaso Di Rocco, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing Zhu Yin, Shigekazu Yoneda, Edward D. Young, Ai Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Geochimica et Cosmochimica Acta   379   172 - 183   2024.8

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.gca.2024.06.016

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  • Hf-W dating of zircon in mesosiderite with high-pressure sintered standard

    Yuji Sano, Yuta Koyama, Naoto Takahata, Takuya Matsuzaki, Mizuho Koike, Makiko K. Haba, Shuhei Sakata, Hideharu Kuwahara, Tetsuo Irifune

    Journal of Analytical Science and Technology   15 ( 1 )   2024.4

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    New standard zircons applicable to in situ analysis of Hf/W ratio by Nanoscale secondary ion mass spectrometer (NanoSIMS) were prepared and applied to Hf-W dating of a differentiated meteorite classified as mesosiderite. The standard zircons were synthesized by high-pressure experiment from starting materials which were mixture of hafnium oxide, tungsten oxide and high-purity zircon powder. The mixed powders were stirred and pulverized by a high-energy ball mill. They were then sintered at 1000 °C and 6 GPa using multi-anvil apparatus. Homogeneity of Hf/W ratios of synthesized zircons was examined by SEM–EDS, EPMA, and Laser Ablation Inductively Coupled Plasma Mass Spectrometer (LA-ICPMS). Hf/W ratios of the same zircons were measured by a NanoSIMS with 2 nA oxygen primary beam and mass resolving power of 10,000. The relative sensitivity factor (RSF) of Hf/W ratio was determined by comparing zircon data measured by LA-ICPMS and NanoSIMS. Observed RSF (Hf/W) of zircon is 0.585 ± 0.180 (hereafter all error 2σ) consistent with 0.855 ± 0.468 of previous work within experimental error margin. The value is higher than observed RSF of glass matrix, 0.301 ± 0.062, and significantly higher than glass data of 0.21–0.22 in references. Based on the RSF, the Hf/W ratios of zircons extracted from mesosiderite “Asuka 882,023” were measured together with W isotopic compositions by NanoSIMS. Observed data in 180Hf/186W–182W/186W diagram are fitted by a straight line, yielding a slope (182Hf/180Hf) of 8.19 ± 3.50 × 10–6. This slope is converted into an absolute zircon Hf-W age of 4536.5+4.6–7.2 Ma using the age anchor of CV3 chondrite. This age agrees well with a reference value of 4532.0+11.4–20.8 Ma.

    DOI： 10.1186/s40543-024-00438-0

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    Other Link： https://link.springer.com/article/10.1186/s40543-024-00438-0/fulltext.html

  • Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples

    Noriko T. Kita, Kouki Kitajima, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Wataru Fujiya, Yoshinari Abe, Jérôme Aléon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken‐ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon‐Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming‐Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing‐Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai‐Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei‐ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Meteoritics & Planetary Science   2024.4

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Oxygen 3‐isotope ratios of magnetite and carbonates in aqueously altered carbonaceous chondrites provide important clues to understanding the evolution of the fluid in the asteroidal parent bodies. We conducted oxygen 3‐isotope analyses of magnetite, dolomite, and breunnerite in two sections of asteroid Ryugu returned samples, A0058 and C0002, using a secondary ion mass spectrometer (SIMS). Magnetite was analyzed by using a lower primary ion energy that reduced instrumental biases due to the crystal orientation effect. We found two groups of magnetite data identified from the SIMS pit morphologies: (1) higher δ18O (from 3‰ to 7‰) and ∆17O (~2‰) with porous SIMS pits mostly from spherulitic magnetite, and (2) lower δ18O (~ −3‰) and variable ∆17O (0‰–2‰) mostly from euhedral magnetite. Dolomite and breunnerite analyses were conducted using multi‐collection Faraday cup detectors with precisions ≤0.3‰. The instrumental bias correction was applied based on carbonate compositions in two ways, using Fe and (Fe + Mn) contents, respectively, because Ryugu dolomite contains higher amounts of Mn than the terrestrial standard. Results of dolomite and breunnerite analyses show a narrow range of ∆17O; 0.0‰–0.3‰ for dolomite in A0058 and 0.2‰–0.8‰ for dolomite and breunnerite in C0002. The majority of breunnerite, including large ≥100 μm grains, show systematically lower δ18O (~21‰) than dolomite (25‰–30‰ and 23‰–27‰ depending on the instrumental bias corrections). The equilibrium temperatures between magnetite and dolomite from the coarse‐grained lithology in A0058 are calculated to be 51 ± 11°C and 78 ± 14°C, depending on the instrumental bias correction scheme for dolomite; a reliable temperature estimate would require a Mn‐bearing dolomite standard to evaluate the instrumental bias corrections, which is not currently available. These results indicate that the oxygen isotope ratios of aqueous fluids in the Ryugu parent asteroid were isotopically heterogeneous, either spatially, or temporary. Initial water ice accreted to the Ryugu parent body might have ∆17O > 2‰ that was melted and interacted with anhydrous solids with the initial ∆17O < 0‰. In the early stage of aqueous alteration, spherulitic magnetite and calcite formed from aqueous fluid with ∆17O ~ 2‰ that was produced by isotope exchange between water (∆17O > 2‰) and anhydrous solids (∆17O < 0‰). Dolomite and breunnerite, along with some magnetite, formed at the later stage of aqueous alteration under higher water‐to‐rock ratios where the oxygen isotope ratios were nearly at equilibrium between fluid and solid phases. Including literature data, δ18O of carbonates decreased in the order calcite, dolomite, and breunnerite, suggesting that the temperature of alteration might have increased with the degree of aqueous alteration.

    DOI： 10.1111/maps.14163

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  • Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites

    Yan Hu, Frédéric Moynier, Wei Dai, Marine Paquet, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Mayu Morita, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Icarus   409   115884 - 115884   2024.2

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.icarus.2023.115884

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  • Hydrogen in magnetite from asteroid Ryugu

    J. Aléon, S. Mostefaoui, H. Bureau, D. Vangu, H. Khodja, K. Nagashima, N. Kawasaki, Y. Abe, C. M. O'D. Alexander, S. Amari, Y. Amelin, K. Bajo, M. Bizzarro, A. Bouvier, R. W. Carlson, M. Chaussidon, B.‐G. Choi, N. Dauphas, A. M. Davis, T. Di Rocco, W. Fujiya, R. Fukai, I. Gautam, M. K. Haba, Y. Hibiya, H. Hidaka, H. Homma, P. Hoppe, G. R. Huss, K. Ichida, T. Iizuka, T. R. Ireland, A. Ishikawa, S. Itoh, N. T. Kita, K. Kitajima, T. Kleine, S. Komatani, A. N. Krot, M.‐C. Liu, Y. Masuda, M. Morita, K. Motomura, F. Moynier, I. Nakai, A. Nguyen, L. R. Nittler, M. Onose, A. Pack, C. Park, L. Piani, L. Qin, S. S. Russell, N. Sakamoto, M. Schönbächler, L. Tafla, H. Tang, K. Terada, Y. Terada, T. Usui, S. Wada, M. Wadhwa, R. J. Walker, K. Yamashita, Q.‐Z. Yin, T. Yokoyama, S. Yoneda, E. D. Young, H. Yui, A.‐C. Zhang, T. Nakamura, H. Naraoka, T. Noguchi, R. Okazaki, K. Sakamoto, H. Yabuta, M. Abe, A. Miyazaki, A. Nakato, M. Nishimura, T. Okada, T. Yada, K. Yogata, S. Nakazawa, T. Saiki, S. Tanaka, F. Terui, Y. Tsuda, S. Watanabe, M. Yoshikawa, S. Tachibana, H. Yurimoto

    Meteoritics & Planetary Science   2024.1

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    In order to gain insights on the conditions of aqueous alteration on asteroid Ryugu and the origin of water in the outer solar system, we developed the measurement of water content in magnetite at the micrometer scale by secondary ion mass spectrometry (NanoSIMS) and determined the H and Si content of coarse‐grained euhedral magnetite grains (polyhedral magnetite) and coarse‐grained fibrous (spherulitic) magnetite from the Ryugu polished section A0058‐C1001. The hydrogen content in magnetite ranges between ~900 and ~3300 wt ppm equivalent water and is correlated with the Si content. Polyhedral magnetite has low and homogenous silicon and water content, whereas fibrous magnetite shows correlated Si and water excesses. These excesses can be explained by the presence of hydrous Si‐rich amorphous nanoinclusions trapped during the precipitation of fibrous magnetite away from equilibrium and testify that fibrous magnetite formed from a hydrous gel with possibly more than 20 wt% water. An attempt to determine the water content in sub‐μm framboids indicates that additional calibration and contamination issues must be addressed before a safe conclusion can be drawn, but hints at elevated water content as well. The high water content in fibrous magnetite, expected to be among the first minerals to crystallize at low water–rock ratio, points to the control of water content by local conditions of magnetite precipitation rather than large‐scale alteration conditions. Systematic lithological variations associated with water‐rich and water‐poor magnetite suggest that the global context of alteration may be better understood if local water concentrations are compared with millimeter‐scale distribution of the various morphologies of magnetite. Finally, the high water content in the magnetite precursor gel indicates that the initial O isotopic composition in alteration water must not have been very different from that of the earliest magnetite crystals.

    DOI： 10.1111/maps.14139

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  • Analysis of Cation Composition in Dolomites on the Intact Particles Sampled from Asteroid Ryugu

    Mayu Morita, Hiroharu Yui, Shu-hei Urashima, Morihiko Onose, Shintaro Komatani, Izumi Nakai, Yoshinari Abe, Yasuko Terada, Hisashi Homma, Kazuko Motomura, Kiyohiro Ichida, Tetsuya Yokoyama, Kazuhide Nagashima, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Peter Hoppe, Gary R. Huss, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Sasha Krot, Ming-Chang Liu, Yuki Masuda, Frédéric Moynier, Ann Nguyen, Larry Nittler, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Tommaso Di Rocco, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Analytical Chemistry   2023.12

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    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acs.analchem.3c03463

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  • Neodymium‐142 deficits and samarium neutron stratigraphy of C‐type asteroid (162173) Ryugu

    Zachary A. Torrano, Michelle K. Jordan, Timothy D. Mock, Richard W. Carlson, Ikshu Gautam, Makiko K. Haba, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel Alexander, Sachiko Amari, Yuri Amelin, Ken‐ichi Bajo, Martin Bizzarro, Audrey Bouvier, Marc Chaussidon, Byeon‐Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming‐Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing‐Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai‐Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei‐ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Meteoritics & Planetary Science   2023.12

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    We report Nd and Sm isotopic compositions of four samples of Ryugu returned by the Hayabusa2 mission, including “A” (first touchdown) and “C” (second touchdown) samples, and several carbonaceous chondrites to evaluate potential genetic relationships between Ryugu and known chondrite groups and track the cosmic ray exposure history of Ryugu. We resolved Nd and Sm isotopic anomalies in small (<20 ng Nd and Sm) sample sizes via thermal ionization mass spectrometer using 1013 Ω amplifiers. Ryugu samples exhibit resolvable negative μ142Nd values consistent with carbonaceous chondrite values, suggesting that Ryugu is related to the parent bodies of carbonaceous chondrites. Ryugu's negative μ149Sm values are the result of exposure to galactic cosmic rays, as demonstrated by the correlation between 150Sm/152Sm and 149Sm/152Sm ratios that fall along the expected neutron capture correlation line. The neutron fluence calculated in the “A” samples (2.75 ± 1.94 × 1015 n cm−2) is slightly higher compared to the “C” samples (0.95 ± 2.04 × 1015 n cm−2), though overlapping within measurement uncertainty. The Sm results for Ryugu, at this level of precision, thus are consistent with a well‐mixed surface layer at least to the depths from which the “A” and “C” samples derive.

    DOI： 10.1111/maps.14109

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  • Nucleosynthetic s-Process Depletion in Mo from Ryugu samples returned by Hayabusa2

    N. Nakanishi, T. Yokoyama, A. Ishikawa, R.J. Walker, Y. Abe, J. Aléon, C.M.O'D. Alexander, S. Amari, Y. Amelin, K.-I. Bajo, M. Bizzarro, A. Bouvier, R.W. Carlson, M. Chaussidon, B.-G. Choi, N. Dauphas, A.M. Davis, T. Di Rocco, W. Fujiya, R. Fukai, I. Gautam, M.K. Haba, Y. Hibiya, H. Hidaka, H. Homma, P. Hoppe, G.R. Huss, K. Ichida, T. Iizuka, T.R. Ireland, S. Itoh, N. Kawasaki, N.T. Kita, K. Kitajima, T. Kleine, S. Komatani, A.N. Krot, M.-C. Liu, Y. Masuda, M. Morita, K. Motomura, F. Moynier, I. Nakai, K. Nagashima, A. Nguyen, L. Nittler, M. Onose, A. Pack, C. Park, L. Piani, L. Qin, S.S. Russell, N. Sakamoto, M. Schönbächler, L. Tafla, H. Tang, K. Terada, Y. Terada, T. Usui, S. Wada, M. Wadhwa, K. Yamashita, Q.-Z. Yin, S. Yoneda, E.D. Young, H. Yui, A.-C. Zhang, T. Nakamura, H. Naraoka, T. Noguchi, R. Okazaki, K. Sakamoto, H. Yabuta, M. Abe, A. Miyazaki, A. Nakato, M. Nishimura, T. Okada, T. Yada, K. Yogata, S. Nakazawa, T. Saiki, S. Tanaka, F. Terui, Y. Tsuda, S.-I. Watanabe, M. Yoshikawa, S. Tachibana, H. Yurimoto

    Geochemical Perspectives Letters   28   31 - 36   2023.12

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    Publishing type：Research paper (scientific journal)   Publisher：European Association of Geochemistry  

    DOI： 10.7185/geochemlet.2341

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  • The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu

    Martin Bizzarro, Martin Schiller, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Mayu Morita, Fréderic Moynier, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    The Astrophysical Journal Letters   958 ( 2 )   L25 - L25   2023.11

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    The nucleosynthetic isotope composition of planetary materials provides a record of the heterogeneous distribution of stardust within the early solar system. In 2020 December, the Japan Aerospace Exploration Agency Hayabusa2 spacecraft returned to Earth the first samples of a primitive asteroid, namely, the Cb-type asteroid Ryugu. This provides a unique opportunity to explore the kinship between primitive asteroids and carbonaceous chondrites. We report high-precision μ26Mg* and μ25Mg values of Ryugu samples together with those of CI, CM, CV, and ungrouped carbonaceous chondrites. The stable Mg isotope composition of Ryugu aliquots defines μ25Mg values ranging from –160 ± 20 ppm to –272 ± 30 ppm, which extends to lighter compositions relative to Ivuna-type (CI) and other carbonaceous chondrite groups. We interpret the μ25Mg variability as reflecting heterogeneous sampling of a carbonate phase hosting isotopically light Mg (μ25Mg ∼ –1400 ppm) formed by low temperature equilibrium processes. After correcting for this effect, Ryugu samples return homogeneous μ26Mg* values corresponding to a weighted mean of 7.1 ± 0.8 ppm. Thus, Ryugu defines a μ26Mg* excess relative to the CI and CR chondrite reservoirs corresponding to 3.8 ± 1.1 and 11.9 ± 0.8 ppm, respectively. These variations cannot be accounted for by in situ decay of 26Al given their respective 27Al/24Mg ratios. Instead, it requires that Ryugu and the CI and CR parent bodies formed from material with a different initial 26Al/27Al ratio or that they are sourced from material with distinct Mg isotope compositions. Thus, our new Mg isotope data challenge the notion that Ryugu and CI chondrites share a common nucleosynthetic heritage.

    DOI： 10.3847/2041-8213/ad09d9

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    Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/ad09d9/pdf

  • Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample

    Tetsuya Yokoyama, Meenakshi Wadhwa, Tsuyoshi Iizuka, Vinai Rai, Ikshu Gautam, Yuki Hibiya, Yuki Masuda, Makiko K. Haba, Ryota Fukai, Rebekah Hines, Nicole Phelan, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Trevor Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Koki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Science Advances   9 ( 45 )   2023.11

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    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous alteration. Isotopic anomalies could have also been affected by delivery of exogenous clasts and aqueous mobilization of soluble elements. Here, we show that isotopic anomalies for mildly soluble Cr are highly variable in Ryugu and CI chondrites, whereas those of Ti are relatively uniform. This variation in Cr isotope ratios is most likely due to physicochemical fractionation between 54 Cr-rich presolar nanoparticles and Cr-bearing secondary minerals at the millimeter-scale in the bulk samples, likely due to extensive aqueous alteration in their parent bodies that occurred after Solar System birth. In contrast, Ti isotopes were marginally affected by this process. Our results show that isotopic heterogeneities in asteroids are not all nebular or accretionary in nature but can also reflect element redistribution by water.

    DOI： 10.1126/sciadv.adi7048

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  • The Oxygen Isotopic Composition of Samples Returned from Asteroid Ryugu with Implications for the Nature of the Parent Planetesimal

    Haolan Tang, Edward D. Young, Lauren Tafla, Andreas Pack, Tommaso Di Rocco, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Kazuhide Nagashima, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    The Planetary Science Journal   4 ( 8 )   144 - 144   2023.8

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    We present oxygen isotopic analyses of fragments of the near-Earth Cb-type asteroid Ryugu returned by the Hayabusa2 spacecraft that reinforce the close correspondence between Ryugu and CI chondrites. Small differences between Ryugu samples and CI chondrites in ${ { \rm{\Delta } } }^{ { \prime} 17}{\rm{O } }$ can be explained at least in part by contamination of the latter by terrestrial water. The discovery that a randomly sampled C-complex asteroid is composed of CI-chondrite-like rock, combined with thermal models for formation prior to significant decay of the short-lived radioisotope 26Al, suggests that if lithified at the time of alteration, the parent body was small (≪50 km radius). If the parent planetesimal was large (>50 km in radius), it was likely composed of high-permeability, poorly lithified sediment rather than consolidated rock.

    DOI： 10.3847/psj/acea62

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    Other Link： https://iopscience.iop.org/article/10.3847/PSJ/acea62/pdf

  • Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid Ryugu

    Ann. N. Nguyen, Prajkta Mane, Lindsay P. Keller, Laurette Piani, Yoshinari Abe, Jérôme Aléon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Science Advances   9 ( 28 )   2023.7

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    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Preliminary analyses of asteroid Ryugu samples show kinship to aqueously altered CI (Ivuna-type) chondrites, suggesting similar origins. We report identification of C-rich, particularly primitive clasts in Ryugu samples that contain preserved presolar silicate grains and exceptional abundances of presolar SiC and isotopically anomalous organic matter. The high presolar silicate abundance (104 ppm) indicates that the clast escaped extensive alteration. The 5 to 10 times higher abundances of presolar SiC (~235 ppm), N-rich organic matter, organics with N isotopic anomalies (1.2%), and organics with C isotopic anomalies (0.2%) in the primitive clasts compared to bulk Ryugu suggest that the clasts formed in a unique part of the protoplanetary disk enriched in presolar materials. These clasts likely represent previously unsampled outer solar system material that accreted onto Ryugu after aqueous alteration ceased, consistent with Ryugu’s rubble pile origin.

    DOI： 10.1126/sciadv.adh1003

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  • Carbonate record of temporal change in oxygen fugacity and gaseous species in asteroid Ryugu

    Wataru Fujiya, Noriyuki Kawasaki, Kazuhide Nagashima, Naoya Sakamoto, Conel M. O’D. Alexander, Noriko T. Kita, Kouki Kitajima, Yoshinari Abe, Jérôme Aléon, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Nature Geoscience   16 ( 8 )   675 - 682   2023.7

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41561-023-01226-y

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    Other Link： https://www.nature.com/articles/s41561-023-01226-y

  • Hydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu Reviewed

    Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken-ichi Bajo, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    The Astrophysical Journal Letters   946 ( 2 )   L43 - L43   2023.4

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    Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

    Abstract

    Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites. Similar to CI chondrites, these fragments underwent extensive aqueous alteration and consist predominantly of hydrous minerals likely formed in the presence of liquid water on the Ryugu parent asteroid. Here we present an in situ analytical survey performed by secondary ion mass spectrometry from which we have estimated the D/H ratio of Ryugu’s hydrous minerals, D/HRyugu, to be [165 ± 19] × 10−6, which corresponds to δDRyugu = +59 ± 121‰ (2σ). The hydrous mineral D/HRyugu’s values for the two sampling sites on Ryugu are similar; they are also similar to the estimated D/H ratio of hydrous minerals in the CI chondrites Orgueil and Alais. This result reinforces a link between Ryugu and CI chondrites and an inference that Ryugu’s samples, which avoided terrestrial contamination, are our best proxy to estimate the composition of water at the origin of hydrous minerals in CI-like material. Based on this data and recent literature studies, the contribution of CI chondrites to the hydrogen of Earth’s surficial reservoirs is evaluated to be ∼3%. We conclude that the water responsible for the alteration of Ryugu’s rocks was derived from water ice precursors inherited from the interstellar medium; the ice partially re-equilibrated its hydrogen with the nebular H2 before being accreted on the Ryugu’s parent asteroid.

    DOI： 10.3847/2041-8213/acc393

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    Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/acc393/pdf

  • Author Correction: Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis (Nature Astronomy, (2022), 7, 2, (182-189), 10.1038/s41550-022-01846-1)

    Paquet, M., Moynier, F., Yokoyama, T., Dai, W., Hu, Y., Abe, Y., Al{\'e}on, J., O?D. Alex, er, C.M., Amari, S., Amelin, Y., Bajo, K.-I., Bizzarro, M., Bouvier, A., Carlson, R.W., Chaussidon, M., Choi, B.-G., Dauphas, N., Davis, A.M., Di Rocco, T., Fujiya, W., Fukai, R., Gautam, I., Haba, M.K., Hibiya, Y., Hidaka, H., Homma, H., Hoppe, P., Huss, G.R., Ichida, K., Iizuka, T., Irel, , T.R., Ishikawa, A., Ito, M., Itoh, S., Kawasaki, N., Kita, N.T., Kitajima, K., Kleine, T., Komatani, S., Krot, A.N., Liu, M.-C., Masuda, Y., McKeegan, K.D., Morita, M., Motomura, K., Nakai, I., Nagashima, K., Nesvorn?, D., Nguyen, A.N., Nittler, L., Onose, M., Pack, A., Park, C., Piani, L., Qin, L., Russell, S.S., Sakamoto, N., Sch{\"o}nb{\"a}chler, M., Tafla, L., Tang, H., Terada, K., Terada, Y., Usui, T., Wada, S., Wadhwa, M., Walker, R.J., Yamashita, K., Yin, Q.-Z., Yoneda, S., Young, E.D., Yui, H., Zhang, A.-C., Nakamura, T., Naraoka, H., Noguchi, T., Okazaki, R., Sakamoto, K., Yabuta, H., Abe, M., Miyazaki, A., Nakato, A., Nishimura, M., Okada, T., Yada, T., Yogata, K., Nakazawa, S., Saiki, T., Tanaka, S., Terui, F., Tsuda, Y., Watanabe, S.-I., Yoshikawa, M., Tachibana, S., Yurimoto, H.

    Nature Astronomy   7 ( 5 )   633 - 633   2023

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41550-023-01938-6

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  • Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2

    Noriyuki Kawasaki, Kazuhide Nagashima, Naoya Sakamoto, Toru Matsumoto, Ken-ichi Bajo, Sohei Wada, Yohei Igami, Akira Miyake, Takaaki Noguchi, Daiki Yamamoto, Sara S. Russell, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Science Advances   8 ( 50 )   2022.12

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    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    The extraterrestrial materials returned from asteroid (162173) Ryugu consist predominantly of low-temperature aqueously formed secondary minerals and are chemically and mineralogically similar to CI (Ivuna-type) carbonaceous chondrites. Here, we show that high-temperature anhydrous primary minerals in Ryugu and CI chondrites exhibit a bimodal distribution of oxygen isotopic compositions: 16 O-rich (associated with refractory inclusions) and 16 O-poor (associated with chondrules). Both the 16 O-rich and 16 O-poor minerals probably formed in the inner solar protoplanetary disk and were subsequently transported outward. The abundance ratios of the 16 O-rich to 16 O-poor minerals in Ryugu and CI chondrites are higher than in other carbonaceous chondrite groups but are similar to that of comet 81P/Wild2, suggesting that Ryugu and CI chondrites accreted in the outer Solar System closer to the accretion region of comets.

    DOI： 10.1126/sciadv.ade2067

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  • Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis

    Marine Paquet, Frederic Moynier, Tetsuya Yokoyama, Wei Dai, Yan Hu, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann N. Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Nature Astronomy   7 ( 2 )   182 - 189   2022.12

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    Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1038/s41550-022-01846-1

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    Other Link： https://www.nature.com/articles/s41550-022-01846-1

  • Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System

    Timo Hopp, Nicolas Dauphas, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto

    Science Advances   8 ( 46 )   2022.11

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    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Little is known about the origin of the spectral diversity of asteroids and what it says about conditions in the protoplanetary disk. Here, we show that samples returned from Cb-type asteroid Ryugu have Fe isotopic anomalies indistinguishable from Ivuna-type (CI) chondrites, which are distinct from all other carbonaceous chondrites. Iron isotopes, therefore, demonstrate that Ryugu and CI chondrites formed in a reservoir that was different from the source regions of other carbonaceous asteroids. Growth and migration of the giant planets destabilized nearby planetesimals and ejected some inward to be implanted into the Main Belt. In this framework, most carbonaceous chondrites may have originated from regions around the birthplaces of Jupiter and Saturn, while the distinct isotopic composition of CI chondrites and Ryugu may reflect their formation further away in the disk, owing their presence in the inner Solar System to excitation by Uranus and Neptune.

    DOI： 10.1126/sciadv.add8141

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  • The Solar System calcium isotopic composition inferred from Ryugu samples Reviewed

    F. Moynier, W. Dai, T. Yokoyama, Y. Hu, M. Paquet, Y. Abe, J. Aléon, C.M.O'D Alexander, S. Amari, Y. Amelin, K.-I. Bajo, M. Bizzarro, A. Bouvier, R.W. Carlson, M. Chaussidon, B.-G. Choi, N. Dauphas, A.M. Davis, T. Di Rocco, W. Fujiya, R. Fukai, I. Gautam, M.K. Haba, Y. Hibiya, H. Hidaka, H. Homma, P. Hoppe, G.R. Huss, K. Ichida, T. Iizuka, T.R. Ireland, A. Ishikawa, M. Ito, S. Itoh, N. Kawasaki, N.T. Kita, K. Kitajima, T. Kleine, S. Komatani, A.N. Krot, M.-C. Liu, Y. Masuda, K.D. McKeegan, M. Morita, K. Motomura, I. Nakai, K. Nagashima, D. Nesvorný, A. Nguyen, L. Nittler, M. Onose, A. Pack, C. Park, L. Piani, L. Qin, S.S. Russell, N. Sakamoto, M. Schönbächler, L. Tafla, H. Tang, K. Terada, Y. Terada, T. Usui, S. Wada, M. Wadhwa, R.J. Walker, K. Yamashita, Q.-Z. Yin, S. Yoneda, E.D. Young, H. Yui, A.-C. Zhang, T. Nakamura, H. Naraoka, T. Noguchi, R. Okazaki, K. Sakamoto, H. Yabuta, M. Abe, A. Miyazaki, A. Nakato, M. Nishimura, T. Okada, T. Yada, K. Yogata, S. Nakazawa, T. Saiki, S. Tanaka, F. Terui, Y. Tsuda, S.-I. Watanabe, M. Yoshikawa, S. Tachibana, H. Yurimoto

    Geochemical Perspectives Letters   24   1 - 6   2022.10

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    DOI： 10.7185/geochemlet.2238

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  • Presolar Stardust in Asteroid Ryugu

    Jens Barosch, Larry R. Nittler, Jianhua Wang, Conel M. O’D. Alexander, Bradley T. De Gregorio, Cécile Engrand, Yoko Kebukawa, Kazuhide Nagashima, Rhonda M. Stroud, Hikaru Yabuta, Yoshinari Abe, Jérôme Aléon, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Laure Bejach, Martin Bizzarro, Lydie Bonal, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, George D. Cody, Emmanuel Dartois, Nicolas Dauphas, Andrew M. Davis, Alexandre Dazzi, Ariane Deniset-Besseau, Tommaso Di Rocco, Jean Duprat, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Minako Hashiguchi, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Kanami Kamide, Noriyuki Kawasaki, A. L. David Kilcoyne, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Mutsumi Komatsu, Alexander N. Krot, Ming-Chang Liu, Zita Martins, Yuki Masuda, Jérémie Mathurin, Kevin D. McKeegan, Gilles Montagnac, Mayu Morita, Smail Mostefaoui, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann N. Nguyen, Takuji Ohigashi, Taiga Okumura, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Eric Quirico, Laurent Remusat, Sara S. Russell, Naoya Sakamoto, Scott A. Sandford, Maria Schönbächler, Miho Shigenaka, Hiroki Suga, Lauren Tafla, Yoshio Takahashi, Yasuo Takeichi, Yusuke Tamenori, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Maximilien Verdier-Paoletti, Sohei Wada, Meenakshi Wadhwa, Daisuke Wakabayashi, Richard J. Walker, Katsuyuki Yamashita, Shohei Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Shogo Tachibana, Hisayoshi Yurimoto

    The Astrophysical Journal Letters   935 ( 1 )   L3 - L3   2022.8

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    Abstract

    We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate, 1 oxide, 1 O-anomalous supernova grain of ambiguous phase, 38 SiC, and 16 carbonaceous grains. At least two of the carbonaceous grains are presolar graphites, whereas several grains with moderate C isotopic anomalies are probably organics. The presolar silicate was located in a clast with a less altered lithology than the typical extensively aqueously altered Ryugu matrix. The matrix-normalized presolar grain abundances in Ryugu are ${4.8}_{-2.6}^{+4.7}$ ppm for O-anomalous grains, ${25}_{-5}^{+6}$ ppm for SiC grains, and ${11}_{-3}^{+5}$ ppm for carbonaceous grains. Ryugu is isotopically and petrologically similar to carbonaceous Ivuna-type (CI) chondrites. To compare the in situ presolar grain abundances of Ryugu with CI chondrites, we also mapped Ivuna and Orgueil samples and found a total of 15 SiC grains and 6 carbonaceous grains. No O-anomalous grains were detected. The matrix-normalized presolar grain abundances in the CI chondrites are similar to those in Ryugu: ${23}_{-6}^{+7}$ ppm SiC and ${9.0}_{-3.6}^{+5.4}$ ppm carbonaceous grains. Thus, our results provide further evidence in support of the Ryugu–CI connection. They also reveal intriguing hints of small-scale heterogeneities in the Ryugu samples, such as locally distinct degrees of alteration that allowed the preservation of delicate presolar material.

    DOI： 10.3847/2041-8213/ac83bd

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    Other Link： https://iopscience.iop.org/article/10.3847/2041-8213/ac83bd/pdf

  • Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites Reviewed

    Tetsuya Yokoyama, Kazuhide Nagashima, Izumi Nakai, Edward D. Young, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Hiroharu Yui, Ai-Cheng Zhang, Harold C. Connolly, Dante S. Lauretta, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naoyuki Hirata, Naru Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kosuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Tatsuhiro Michikami, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Yuichi Tsuda, Ryudo Tsukizaki, Koji Wada, Sei-ichiro Watanabe, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako Suzuki, Toru Yada, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Shogo Tachibana, Hisayoshi Yurimoto

    Science   379 ( 6634 )   2022.6

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    Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. Samples of the C-type asteroid (162173) Ryugu were retrieved by the Hayabusa2 spacecraft. We measure the mineralogy, bulk chemical and isotopic compositions of Ryugu samples. They are mainly composed of materials similar to carbonaceous chondrite meteorites, particularly the CI (Ivuna-type) group. The samples consist predominantly of minerals formed in aqueous fluid on a parent planetesimal. The primary minerals were altered by fluids at a temperature of 37 ± 10°C, (Stat.) (Syst.) million years after formation of the first solids in the Solar System. After aqueous alteration, the Ryugu samples were likely never heated above ~100°C. The samples have a chemical composition that more closely resembles the Sun’s photosphere than other natural samples do.

    DOI： 10.1126/science.abn7850

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  • Giant impact onto a Vesta-like asteroid and formation of mesosiderites through mixing of metallic core and surface crust Reviewed

    Keisuke Sugiura, Makiko K. Haba, Hidenori Genda

    Icarus   114949 - 114949   2022.2

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    DOI： 10.1016/j.icarus.2022.114949

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  • Cosmogenic noble gas nuclides in zircons from the Estherville mesosiderite Reviewed

    Makiko K. Haba, Keisuke Nagao

    Meteoritics & Planetary Science   2021.5

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1111/maps.13660

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    Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/maps.13660

  • Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis Reviewed

    Makiko K. Haba, Yi-Jen Lai, Jörn-Frederik Wotzlaw, Akira Yamaguchi, Maria Lugaro, Maria Schönbächler

    Proceedings of the National Academy of Sciences   118 ( 8 )   e2017750118 - e2017750118   2021.2

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Proceedings of the National Academy of Sciences  

    The niobium-92–zirconium-92 (92Nb–92Zr) decay system with a half-life of 37 Ma has great potential to date the evolution of planetary materials in the early Solar System. Moreover, the initial abundance of the <italic>p</italic>-process isotope 92Nb in the Solar System is important for quantifying the contribution of <italic>p</italic>-process nucleosynthesis in astrophysical models. Current estimates of the initial 92Nb/93Nb ratios have large uncertainties compromising the use of the 92Nb–92Zr cosmochronometer and leaving nucleosynthetic models poorly constrained. Here, the initial 92Nb abundance is determined to high precision by combining the 92Nb–92Zr systematics of cogenetic rutiles and zircons from mesosiderites with U–Pb dating of the same zircons. The mineral pair indicates that the 92Nb/93Nb ratio of the Solar System started with (1.66 ± 0.10) × 10−5, and their 92Zr/90Zr ratios can be explained by a three-stage Nb–Zr evolution on the mesosiderite parent body. Because of the improvement by a factor of 6 of the precision of the initial Solar System 92Nb/93Nb, we can show that the presence of 92Nb in the early Solar System provides further evidence that both type Ia supernovae and core-collapse supernovae contributed to the light <italic>p</italic>-process nuclei.

    DOI： 10.1073/pnas.2017750118

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  • ID-TIMS zircon U–Pb geochronology of the Camel Donga eucrite Reviewed

    Makiko K. Haba, Jörn-Frederik Wotzlaw

    Chemical Geology   ( 567 )   120073 - 120073   2021.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.chemgeo.2021.120073

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  • Geochemistry and Sm‐Nd chronology of a Stannern‐group eucrite, Northwest Africa 7188 Reviewed

    Saya Kagami, Makiko K. Haba, Tetsuya Yokoyama, Tomohiro Usui, Richard C. Greenwood

    Meteoritics & Planetary Science   54 ( 11 )   2710 - 2728   2019.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1111/maps.13382

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  • Mesosiderite formation on asteroid 4 Vesta by a hit-and-run collision Reviewed

    Makiko K. Haba, Jörn-Frederik Wotzlaw, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    Nature Geoscience   2019.7

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    Authorship：Lead author,　Corresponding author   Publisher：Springer Science and Business Media {LLC}  

    DOI： 10.1038/s41561-019-0377-8

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  • Trace element composition and U-Pb age of zircons from Estherville: Constraints on the timing of the metal-silicate mixing event on the mesosiderite parent body Reviewed

    Makiko K. Haba, Akira Yamaguchi, Hiroyuki Kagi, Keisuke Nagao, Hiroshi Hidaka

    GEOCHIMICA ET COSMOCHIMICA ACTA   215   76 - 91   2017.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.gca.2017.07.028

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    Other Link： http://orcid.org/0000-0003-2554-7849

  • Major elements and noble gases of the Jinju (H5) meteorite, an observed fall on March 9, 2014, in South Korea Reviewed

    Keisuke Nagao, Makiko K. Haba, Jong Ik Lee, Taehoon Kim, Mi Jung Lee, Changkun Park, Yong Joo Jwa, Byeon-Gak Choi

    GEOCHEMICAL JOURNAL   50 ( 4 )   315 - 325   2016

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2343/geochemj.2.0418

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  • Mineralogy, petrology, chronology, and exposure history of the Chelyabinsk meteorite and parent body Reviewed

    K. Righter, P. Abell, D. Agresti, E. L. Berger, A. S. Burton, J. S. Delaney, M. D. Fries, E. K. Gibson, M. K. Haba, R. Harrington, G. F. Herzog, L. P. Keller, D. Locke, F. N. Lindsay, T. J. McCoy, R. V. Morris, K. Nagao, K. Nakamura-Messenger, P. B. Niles, L. E. Nyquist, J. Park, Z. X. Peng, C. -Y. Shih, J. I. Simon, C. C. Swisher, M. J. Tappa, B. D. Turrin, R. A. Zeigler

    METEORITICS & PLANETARY SCIENCE   50 ( 10 )   1790 - 1819   2015.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1111/maps.12511

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    Other Link： http://orcid.org/0000-0003-2554-7849

  • Timing of global crustal metamorphism on Vesta as revealed by high-precision U-Pb dating and trace element chemistry of eucrite zircon Reviewed

    Tsuyoshi Iizuka, Akira Yamaguchi, Makiko K. Haba, Yuri Amelin, Peter Holden, Sonja Zink, Magdalena H. Huyskens, Trevor R. Ireland

    EARTH AND PLANETARY SCIENCE LETTERS   409   182 - 192   2015.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.epsl.2014.10.055

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  • Major and trace elements of zircons from basaltic eucrites: Implications for the formation of zircons on the eucrite parent body Reviewed

    Makiko K. Haba, Akira Yamaguchi, Kenji Horie, Hiroshi Hidaka

    EARTH AND PLANETARY SCIENCE LETTERS   387   10 - 21   2014.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.epsl.2013.11.006

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  • Chelyabinsk airburst, damage assessment, meteorite recovery, and characterization Reviewed

    Olga P. Popova, Peter Jenniskens, Vacheslav Emel'yanenko, Anna Kartashova, Eugeny Biryukov, Sergey Khaibrakhmanov, Valery Shuvalov, Yurij Rybnov, Alexandr Dudorov, Victor I. Grokhovsky, Dmitry D. Badyukov, Qing-Zhu Yin, Peter S. Gural, Jim Albers, Mikael Granvik, Läslo G. Evers, Jacob Kuiper, Vladimir Kharlamov, Andrey Solovyov, Yuri S. Rusakov, Stanislav Korotkiy, Ilya Serdyuk, Alexander V. Korochantsev, Michail Yu. Larionov, Dmitry Glazachev, Alexander E. Mayer, Galen Gisler, Sergei V. Gladkovsky, Josh Wimpenny, Matthew E. Sanborn, Akane Yamakawa, Kenneth L. Verosub, Douglas J. Rowland, Sarah Roeske, Nicholas W. Botto, Jon M. Friedrich, Michael E. Zolensky, Loan Le, Daniel Ross, Karen Ziegler, Tomoki Nakamura, Insu Ahn, Jong Ik Lee, Qin Zhou, Xian-Hua Li, Qiu-Li Li, Yu Liu, Guo-Qiang Tang, Takahiro Hiroi, Derek Sears, Ilya A. Weinstein, Alexander S. Vokhmintsev, Alexei V. Ishchenko, Phillipe Schmitt-Kopplin, Norbert Hertkorn, Keisuke Nagao, Makiko K. Haba, Mutsumi Komatsu, Takashi Mikouchi

    Science   342 ( 6162 )   1069 - 1073   2013

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    DOI： 10.1126/science.1242642

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  • SHRIMP in situ isotopic analyses of REE, Pb and U in micro-minerals bearing fission products in the Oklo and Bangombe natural reactors A review of a natural analogue study for the migration of fission products Reviewed

    H. Hidaka, M. Kikuchi

    PRECAMBRIAN RESEARCH   183 ( 1 )   158 - 165   2010.11

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    DOI： 10.1016/j.precamres.2010.07.012

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    Other Link： http://orcid.org/0000-0003-2554-7849

  • Formation and geochemical significance of micrometallic aggregates including fissiogenic platinum group elements in the Oklo natural reactor, Gabon Reviewed

    Makiko Kikuchi, Hiroshi Hidaka, Francois Gauthier-Lafaye

    GEOCHIMICA ET COSMOCHIMICA ACTA   74 ( 16 )   4709 - 4722   2010.8

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    DOI： 10.1016/j.gca.2010.06.004

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  • Noble gas isotopic compositions of zircons above the Bangombe natural fission reactor Reviewed

    Makiko Kikuchi, Keisuke Nagao, Ken-ichi Bajo, Hiroshi Hidaka

    GEOCHIMICA ET COSMOCHIMICA ACTA   74 ( 12 )   A514 - A514   2010.6

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  • In-situ U-Pb analyses of highly altered zircon from sediments overlying the Bangombe&apos; natural fission reactor, Gabon Reviewed

    Makiko Kikuchi, Hiroshi Hidaka

    GEOSCIENCES JOURNAL   13 ( 3 )   257 - 264   2009.9

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    DOI： 10.1007/s12303-009-0025-1

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  • Formation process of micro-metallic aggregates in the Oklo natural reactor Reviewed

    Makiko Kikuchi, Hiroshi Hidaka

    GEOCHIMICA ET COSMOCHIMICA ACTA   73 ( 13 )   A650 - A650   2009.6

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  • Geochemical and isotopic properties of micro-metallic aggregates in the Oklo natural reactor Reviewed

    Makiko Kikuchi, Hiroshi Hidaka

    GEOCHIMICA ET COSMOCHIMICA ACTA   72 ( 12 )   A470 - A470   2008.7

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  • Geochernical behavior of radionuclides in highly altered zircon above the Bangombe natural fission reactor, Gabon Reviewed

    Makiko Kikuchi, Hiroshi Hidaka, Kenji Horie

    PHYSICS AND CHEMISTRY OF THE EARTH   33 ( 14-16 )   978 - 982   2008

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    DOI： 10.1016/j.pce.2008.05.009

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  • Redistribution of REE, Pb and U by supergene weathering studied from in-situ isotopic analyses of the Bangombe' natural reactor, Gabon Reviewed

    M. Kikuchi, H. Hidaka, K. Horie, F. Gauthier-Lafaye

    GEOCHIMICA ET COSMOCHIMICA ACTA   71 ( 19 )   4716 - 4726   2007.10

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    DOI： 10.1016/j.gca.2007.07.016

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MISC

  • 隕石ジルコンを用いた宇宙線照射年代測定法

    羽場麻希子, 長尾敬介

    日本地球惑星科学連合2022年大会   MTT44-P03   2022.5

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  • Precise determination of the initial abundance of Niobium-92 in the Solar System Invited

    2021.9

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  • High-precision CA-ID-TIMS U-Pb dating of meteoritic zircon

    Makiko K. Haba, Jörn-Frederik Wotzlaw

    2020.11

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  • Mesosiderite formation on asteroid Vesta by a giant collision

    Makiko K. Haba, Jörn-Fredrik Wotzlaw, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    2019.9

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  • Chronological evidence for mesosiderite formation on Vesta by a hit-and-run collision

    Makiko K. Haba, Jörn-Frederik Wotzlaw, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    The 82nd Annual Meeting of The Meteoritical Society   6242   2019.7

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  • Evolutionary history of asteroid Vesta based on the chronology of Vestan meteorites Invited

    Makiko K. Haba, Jörn-Frederik Wotzlaw, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    2019 Taiwan Geosciences Assembly   GS-V6-009   2019.5

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  • 高圧合成試料に基づくメソシデライト・ジルコンのHf‐W年代測定

    小山雄大, 高畑直人, 佐野有司, 杉浦直治, 小池みずほ, 羽場麻希子, 坂田周平, 桑原秀治, 入舩徹男

    日本地球惑星科学連合大会予稿集(Web)   2019   ROMBUNNO.SGL27‐08 (WEB ONLY)   2019

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  • Multi-chronology of meteoritic zircon and the initial abundance of plutonium-244 in the solar system

    Makiko K. Haba, Keisuke Nagao, Jörn-Frederik Wotzlaw, Akira Yamaguchi

    The 81st Annual Meeting of the Meteoritical Society   6189   2018.7

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  • Nb-Zr systematics of rutiles and U-Pb ages of zircons from mesosiderites: chronological implications for the early thermal evolution of the parent body Invited

    Makiko K. Haba, Jörn-Frederik Wotzlaw, Yi-Jen Lai, Maria Schönbächler, Akira Yamaguchi

    Asia Oceania Geosciences Society 15th annual meeting   PS12-A009   2018.6

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  • 隕石ジルコンの複合的年代学

    羽場麻希子, 長尾敬介, WOTZLAW Joern‐Frederik, 山口亮

    日本地球化学会年会要旨集(Web)   65th   ROMBUNNO.3P14(J‐STAGE)   2018

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  • 消滅核種Pu‐244の太陽系初生存在度

    羽場麻希子, 長尾敬介, WOTZLAW Joern‐Frederik, 山口亮

    日本地球化学会年会要旨集(Web)   65th   ROMBUNNO.2A10(J‐STAGE)   2018

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  • メタル組成からみたIAB鉄隕石とウィノナイトの関連性とその化学進化

    日高義浩, 日高義浩, 白井直樹, 羽場麻希子, 羽場麻希子, 山口亮, DEBAILLE Vinciane

    日本地球化学会年会要旨集(Web)   65th   ROMBUNNO.3P07(J‐STAGE)   2018

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  • Stannernグループユークライトの希ガス同位体測定

    鏡味沙耶, 羽場麻希子, 長尾敬介, 横山哲也, 山口亮

    日本地球化学会年会要旨集(Web)   65th   ROMBUNNO.3A07(J‐STAGE)   2018

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  • Rutiles and zircons of mesosiderites: combined niobium-zirconium and uranium-lead chronometry and the initial abundance of niobium-92 in the solar system

    Makiko K. Haba, Yi-Jen Lai, Jörn-Frederik Wotzlaw, Akira Yamaguchi, Maria Schönbächler

    48th Lunar and Planetary Science Conference   1739   2017.3

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  • 消滅核種92Nbの太陽系初生存在度とその起源への制約

    羽場麻希子, 羽場麻希子, LAI Yi‐Jen, WOTZLAW Joern‐Fredrik, 山口亮, SCHOENBAECHLER Maria

    日本地球化学会年会要旨集(Web)   64th   ROMBUNNO.3A14(J‐STAGE) - 198   2017

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    DOI： 10.14862/geochemproc.64.0_198

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  • Stannern trendユークライトNorthwest Africa7188の地球化学的特徴とSm‐Nd年代学

    鏡味沙耶, 横山哲也, 臼井寛裕, 羽場麻希子, GREENWOOD Richard C

    日本地球化学会年会要旨集(Web)   64th   ROMBUNNO.3P12(J‐STAGE)   2017

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  • 非炭素質コンドライト隕石の高精度Sr同位体測定

    杉本圭, 深井稜汰, 横山哲也, 鏡味沙耶, 羽場麻希子

    日本地球化学会年会要旨集(Web)   64th   ROMBUNNO.3A11(J‐STAGE) - 195   2017

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    DOI： 10.14862/geochemproc.64.0_195

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  • 石鉄隕石メソシデライトのジルコンの地球化学的研究

    八木晃, 羽場麻希子, 岡林識起, 山口亮, 横山哲也

    日本地球化学会年会要旨集(Web)   64th   ROMBUNNO.3P06(J‐STAGE) - 260   2017

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    DOI： 10.14862/geochemproc.64.0_260

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  • Niobium-zirconium systematics of meteoritic rutiles: application to the chronology of mesosiderites.

    Makiko K. Haba, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    The 79th Annual Meeting of the Meteoritical Society   51   6139 - A304   2016.8

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  • LL CHONDRITIC BRECCIAS AND THEIR SIGNIFICANCE TO THE EVOLUTION OF LL PARENT BODIES

    M. Kimura, A. Yamaguchi, K. Nagao, M. K. Haba, Ph. Chaeys, V. Debaille, L. Pittarello

    METEORITICS & PLANETARY SCIENCE   51   A371 - A371   2016.8

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  • WATER IN THE EARLY DIFFERENTIATED ASTEROIDS: INSIGHT FROM APATITE IN BASALTIC EUCRITES

    M. Koike, T. Iizuka, N. Takahatal, Y. Sano, M. K. Haba

    METEORITICS & PLANETARY SCIENCE   51   A381 - A381   2016.8

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  • NOBLE GASES IN NAKHLA AND THREE NAKHLITES MILLER RANGE 090030, 090032, AND 090136.

    K. Nagao, M. K. Haba, J. Park, J. Choi, J. M. Baek, C. Park, J. I. Lee, M. J. Lee, T. Mikouchi, L. E. Nyquist, G. F. Herzog, B. D. Turrin, F. N. Lindsay, J. S. Delaney, C. C. Swisher

    METEORITICS & PLANETARY SCIENCE   51   A479 - A479   2016.8

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  • Nb-Zr systematics of rutiles from mesosiderites

    Makiko K. Haba, Yi-Jen Lai, Akira Yamaguchi, Maria Schönbächler

    Goldschmidt Conference   1027   2016.6

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  • FORMATION MECHANISM OF ZIRCONS IN MESOSIDERITES.

    M. K. Haba, A. Yamaguchi, H. Hidaka

    METEORITICS & PLANETARY SCIENCE   50   2015.8

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  • NOBLE GASES OF THE JINJU (H5) METEORITE FELL ON MARCH 9, 2014, IN KOREA.

    K. Nagao, M. K. Haba, J. I. Lee, T. Kim, M. J. Lee

    METEORITICS & PLANETARY SCIENCE   50   2015.8

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  • "NORMAL PLANETARY" Ne-Q IN CHELYABINSK AND MARS

    L. E. Nyquist, J. Park, K. Nagao, M. K. Haba, T. Mikouchi, M. Kusakabe, C. -Y. Shih, G. F. Herzog

    METEORITICS & PLANETARY SCIENCE   50   2015.8

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  • 希ガス同位体組成に基づくチェリャビンスク隕石の宇宙化学的特徴

    羽場麻希子, 長尾敬介, 角野浩史, 三河内岳, 小松睦美, ZOLENSKY Michael E, ZOLENSKY Michael E

    スペースガード研究   ( 6 )   34 - 35   2014.11

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  • NWA7325エコンドライトの鉱物学及び希ガス同位体組成から見た形成過程について

    長谷川輝, 三河内岳, 長尾敬介, 羽場麻希子, BIZZARRO Martin

    日本鉱物科学会年会講演要旨集   2014   167   2014.9

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  • NOBLE GAS AND MINERALOGICAL STUDIES OF NWA 7325 UNGROUPED ACHONDRITE.

    H. Hasegawa, M. K. Haba, K. Nagao, T. Mikouchi, M. Bizzarro

    METEORITICS & PLANETARY SCIENCE   49   A158 - A158   2014.9

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  • NOBLE GASES IN YAMATO-82094, A NEW TYPE OF CARBONACEOUS CHONDRITE.

    M. K. Haba, K. Nagao

    METEORITICS & PLANETARY SCIENCE   49   A148 - A148   2014.9

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  • NOBLE GASES IN TWO FRAGMENTS OF DIFFERENT LITHOLOGIES FROM THE ALMAHATA SITTA METEORITE.

    K. Nagao, M. K. Haba, M. Zolensky, P. Jenniskens, M. H. Shaddad

    METEORITICS & PLANETARY SCIENCE   49   A294 - A294   2014.9

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  • メソシデライト中リン酸塩鉱物の希土類元素組成

    羽場麻希子, 白井直樹, 山口亮

    日本地球化学会年会講演要旨集   61st   326 - 306   2014

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    DOI： 10.14862/geochemproc.61.0_306

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  • ユークライト中ジルコンのU‐Pb年代及び微量元素組成から読み解く小惑星ベスタの初期地殻進化

    飯塚毅, 山口亮, 羽場麻希子, AMELIN Y, HOLDEN P, IRELAND T

    日本地球化学会年会講演要旨集   61st   193 - 181   2014

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    DOI： 10.14862/geochemproc.61.0_181

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  • メソシデライト中ジルコンの局所同位体化学的研究

    羽場麻希子, 山口亮, 鍵裕之, 長尾敬介, 日高洋

    日本地球化学会年会講演要旨集   60th   1   2013

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  • 福島第一原子力発電所事故:再臨界の可能性は?―オクロ天然原子炉の教訓

    羽場麻希子, 小嶋稔

    科学   82 ( 12 )   1343 - 1346   2012.12

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  • 「福島原発―再臨界の可能性」―オクロ天然原子炉の教訓

    小嶋稔, 羽場麻希子

    日本地球化学会年会講演要旨集   59th   39   2012

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  • 玄武岩質ユークライト中ジルコンの形成環境の推定

    羽場麻希子, 山口亮, 堀江憲路, 日高洋

    日本地球化学会年会講演要旨集   59th   290   2012

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  • ユークライト中ジルコンの希土類元素パターン

    菊池麻希子, 山口亮, 堀江憲路, 日高洋

    日本地球化学会年会講演要旨集   58th   184 - 174   2011

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    DOI： 10.14862/geochemproc.58.0.174.0

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  • バゴンベ天然原子炉上部に存在するジルコンの希ガス同位体組成

    菊池麻希子, 長尾敬介, 馬上謙一, 日高洋

    日本地球化学会年会講演要旨集   57th ( 0 )   42 - 39   2010

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    DOI： 10.14862/geochemproc.57.0.39.0

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  • Zr,Mo,Ru,Pb,U同位体組成からみた天然原子炉内の金属微粒子の形成過程について

    菊池麻希子, 日高洋

    日本地球化学会年会講演要旨集   56th   49 - 44   2009

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  • 天然原子炉内に存在する金属微粒子中のZr,Mo,Ru,Pb同位体特性

    菊池麻希子, 日高洋

    日本地球化学会年会講演要旨集   55th   53 - 49   2008

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  • 著しく損傷を受けたジルコン内でのU,Pb,REEの再分配挙動について

    菊池麻希子, 日高洋, 堀江憲路

    日本地球化学会年会講演要旨集   54th   81   2007

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  • Redistribution of REE in association with formation of secondary uranium minerals

    M. Kikuchi, H. Hidaka, K. Horie

    GEOCHIMICA ET COSMOCHIMICA ACTA   70 ( 18 )   A317 - A317   2006.8

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    DOI： 10.1016/j.gca.2006.06.641

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  • 変質作用を受けたジルコン内における放射性核種の挙動に関する同位体化学的検証

    菊池麻希子, 日高洋, 堀江憲路

    日本地球化学会年会講演要旨集   53rd   22   2006

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Awards

  • 令和3年度理学院若手研究奨励賞

    2021.12   東京工業大学  

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Research Projects

  • Determination of formation age of a giant crater on the asteroid Vesta based on (U-Th)/He ages of zircons

    Grant number：23K03474  2023.4 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

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    Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）

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  • 隕石の高精度年代測定に基づく小惑星ベスタでの大規模衝突の検証

    Grant number：22KK0229  2023 - 2025

    日本学術振興会  科学研究費助成事業  国際共同研究加速基金(国際共同研究強化(A))

    羽場 麻希子

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    Grant amount：\15470000 （ Direct Cost: \11900000 、 Indirect Cost：\3570000 ）

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  • Multi-isotopic analyses of the samples returned from Ryugu: Toward the comprehensive understanding of the origin and formation history of C-type asteroids

    Grant number：21KK0058  2021.10 - 2026.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

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    Grant amount：\19110000 （ Direct Cost: \14700000 、 Indirect Cost：\4410000 ）

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  • 小惑星ベスタの形成初期における大規模衝突破壊の年代学的検証 研究課題

    2019 - 2022

    科学研究費助成事業  基盤研究（C） 

    羽場麻希子

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  • 隕石ジルコンを用いた消滅核種プルトニウム244初生存在度の検証

    2017 - 2019

    科学研究費助成事業  若手研究（B） 

    羽場麻希子

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  • 隕石中微小鉱物を用いた消滅核種92Nbの初生存在度の検証

    2015 - 2017

    海外特別研究員制度 

    羽場麻希子

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    Authorship：Principal investigator  Grant type：Competitive

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  • ニオブ-ジルコニウム放射壊変系に基づく太陽系形成前後の元素・物質進化過程の解明

    2012 - 2013

    公益信託山村富美記念女性自然科学者研究助成基金  山村フェロー 

    羽場麻希子

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  • 惑星物質の進化過程解明のための局所同位体化学的アプローチ

    Grant number：11J08649  2011 - 2013

    科学研究費助成事業  特別研究員奨励費  特別研究員奨励費

    羽場麻希子

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    Authorship：Principal investigator  Grant type：Competitive

    本研究ではメソシデライト(Estherville隕石)中のジルコンの電子プローブマイクロアナライザ(EPMA)を用いた主要元素の定量分析、高感度高分解能イオンマイクロプロープ(SHRIMP)を用いた希土類元素(REE)定量分析およびU-Pb年代分析を行い、ジルコンの母天体における形成過程を解明することを試みた。
    Esthervine中からは小惑星起源隕石中で最大のジルコン(300μm×100μm)が見つかった。まず、反射電子像とカソードルミネッセンス(CL)像から、ジルコン内の直径50μm程度の領域がウランやトリウム、REEに濃集している可能性が示された。SHRIMPを用いたREEおよびウラン定量分析からは、これらの元素の濃集が示唆された領域でREEおよびウラン濃度がユークライト中のジルコンの濃度と良く一致していることが示された。それ以外の領域では、REEやウランはともに非常に濃度が低いことが確認された。周辺に存在する鉱物学的観察と併せて考えると、このジルコンは元々存在していたジルコン(REEおよびウラン濃集域に相当する部分)が還元的環境下において、周辺鉱物の部分溶融によって吐き出されたZrやSiをソースとして過成長を起こしたと考えられる。メソシデライト中に玄武岩質ユークライトと非常に良く似たREEおよびウラン濃度を持つジルコンが存在することは、ユークライトとメソシデライトの母天体が同一もしくは非常に類似した進化を遂げた小惑星であることを示唆している。U-Pb年代分析による形成年代は約45.2億年であり、これまで定まっていなかったメソシデライト母天体におけるメタルーシリケイト混合イベントの年代に対応すると考えられる。今後、各種メソシデライト中のジルコンを系統的に年代分析することにより、メソシデライト母天体の進化過程が明らかになると予想される。

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  • 局所分析に基づく放射性核種の地球環境中における固定・遅延効果の解明

    Grant number：07J08344  2007 - 2009

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    菊池 麻希子

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    Grant amount：\2700000 （ Direct Cost: \2700000 ）

    本年度は,地球表層における放射性核種や核分裂生成物の移動・固定・遅延のメカニズムに関する素過程を解明することを目的とし,以下のような研究を実施した.
    核分裂反応によって多量に生成されるZr,Mo,Ru,Rh,Pdから構成される金属微粒子の天然原子炉内における形成過程および核種の長期における移行挙動について考察を行った.本研究で見出された粒子の化学組成,同位体組成はこれまでに見つかっている粒子のそれとは明らかに異なっていることが示唆された.また,粒子のU,Pb,Ru同位体組成からは,これらの粒子内において形成後,水の放射線分解の影響を受けて酸化還元状態が著しく変化し,UやTcなどの核種の溶出が引き起こされたことが明らかとなった.
    一方で,天然原子炉周辺に存在するジルコンの希ガス同位体組成を調べることにより,核分裂連鎖反応の影響を受けた場合のジルコン中の希ガス組成を明らかにすること,また,これらのジルコンを用いて,一粒のジルコンから全ての希ガス(He,Ne,Ar,Kr,Xe)を抽出する方法を確立することを目指した.測定によって得られたKr,Xe同位体組成からは,^<238>Uの自発核分裂起源のKr,Xeの他に,わずかながら熱中性子による^<235>Uの核分裂起源のXeが検出された.この結果は原子炉稼動時に放出された中性子が原子炉周辺に達し,周辺部に存在していたジルコン内の^<235>Uの核分裂反応を引き起こしたためであると考えられる.

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Other

  • 消滅核種ニオブ92の太陽系初生存在度の決定｜プレスリリース（東工大）

    2021.3

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    https://www.titech.ac.jp/news/2021/049098.html

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  • 太陽系初期における原始惑星の巨大衝突｜プレスリリース（東工大）

    2019.6

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    https://www.titech.ac.jp/news/2019/044507.html

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Media Coverage

  • 科学ピックアップ 小惑星での巨大衝突特定 Newspaper, magazine

    毎日新聞  2019.7

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  • Rare Meteorites on Earth Forged in Massive Crash on Asteroid Vesta Internet

    SPACE.COM  2019.6

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    Author：Other 

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