2024/09/26 更新

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写真a

マツノ　ジユンヤ
松野 淳也
MATSUNO JUNYA
所属
工学研究院 化学工学部門 助教
工学部 化学工学科（併任）
工学府 化学工学専攻（併任）
職名
助教
ホームページ
外部リンク

研究分野

  • 自然科学一般 / 宇宙惑星科学

経歴

  • 京都大学 立命館大学 園田女子大学 大谷大学

研究テーマ・研究キーワード

  • 研究テーマ：宇宙塵

    研究キーワード：宇宙塵

    研究期間： 2024年

  • 研究テーマ：宇宙鉱物学

    研究キーワード：宇宙鉱物学

    研究期間： 2024年

  • 研究テーマ：太陽系の始原物質に関する、物質科学的研究。 特に、模擬物質の合成、変成実験。電子顕微鏡やX線イメージングを用いた地球外物質の分析。

    研究キーワード：宇宙塵、宇宙鉱物学

    研究期間： 2009年10月

受賞

  • 最優秀発表賞

    2014年9月   日本惑星科学会  

  • 宇宙惑星科学セクション学生優秀発表賞

    2014年5月   日本地球惑星科学連合  

論文

  • はやぶさ2リターンサンプルの放射光分析が解き明かした小惑星リュウグウの形成史

    松本 恵, 土山 明, 松野淳也, 上椙真之, 安武正展, 上杉健太朗, 竹内晃久

    放射光   37 ( 4 )   238 - 252   2024年7月

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    記述言語：日本語   掲載種別：研究論文（学術雑誌）  

  • Synthesis of ternary titanium-niobium nitride nanoparticles by induction thermal plasma

    Wang, YR; Zhang, KW; Hirose, M; Matsuno, J; Tanaka, M; Watanabe, T

    JAPANESE JOURNAL OF APPLIED PHYSICS   63 ( 9 )   2024年9月   （ ISSN:0021-4922 eISSN:1347-4065 ）

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    出版者・発行元：Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers  

    High-purity ternary titanium-niobium nitride nanoparticles were prepared by an induction thermal plasma. Metallic Ti and Nb powders served as raw materials. Molar fractions of Nb/(Ti+Nb) were set at various levels including 0, 0.25, 0.5, 0.75, and 1. Ammonia was introduced from the bottom into the plasma equipment as a quench gas. Nanoparticles crystallized in a cubic rock salt structure in the crystallographic space group Fm-3m. All nanoparticles exhibited similar morphology. The average particle size across all samples is approximately 10-14 nm. Elements Ti, Nb, and N are almost uniformly distributed in the nanoparticles. Investigations into the formation mechanism were conducted by examining nucleation temperature and thermodynamic analysis. Ternary titanium-niobium nitride nanoparticles form rapidly through nucleation, condensation, and coagulation with a nitridation reaction. Induction thermal plasma proves to be a highly efficient method for synthesizing ternary titanium-niobium nitride nanoparticles.

    DOI： 10.35848/1347-4065/ad70be

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  • Three-dimensional textures of Ryugu samples and their implications for the evolution of aqueous alteration in the Ryugu parent body 査読

    Tsuchiyama, A; Matsumoto, M; Matsuno, J; Yasutake, M; Nakamura, T; Noguchi, T; Miyake, A; Uesugi, K; Takeuchi, A; Okumura, S; Fujioka, Y; Sun, MQ; Takigawa, A; Matsumoto, T; Enju, S; Mitsukawa, I; Enokido, Y; Kawamoto, T; Mikouchi, T; Michikami, T; Morita, T; Kikuiri, M; Amano, K; Kagawa, E; Rubino, S; Dionnet, Z; Aleon-Toppani, A; Brunetto, R; Zolensky, ME; Nakano, T; Nakano, N; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Nakazawa, S; Terui, F; Tachibana, S; Watanabe, S; Tsuda, Y

    GEOCHIMICA ET COSMOCHIMICA ACTA   375   146 - 172   2024年6月   （ ISSN:0016-7037 eISSN:1872-9533 ）

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    掲載種別：研究論文（学術雑誌）   出版者・発行元：Geochimica et Cosmochimica Acta  

    Samples collected from the surface/subsurface of C-type asteroid 162173 Ryugu by the Hayabusa2 mission were nondestructively analyzed in three dimensions (3D). Seventy-three small particles (approximately 10–180 µm in size) were observed using X-ray nanotomography, with an effective spatial resolution of approximately 200 nm. Detailed descriptions of these samples in terms of mineralogy, petrology, and variations among particles were reported. The 57 most common particles consisted of a phyllosilicate matrix containing mineral grains, mainly magnetite, pyrrhotite, dolomite and apatite. The remaining particles were mostly monomineralic particles (pyrrhotite, dolomite, breunnerite, apatite, and Mg-Na phosphate) with two unique particles (calcite in a Al2Si2O5(OH)4 matrix, and CaCO3, phyllosilicate, and tochilinite-chronstedtite inclusions in a carbonaceous material matrix). The results confirmed that the samples correspond to Ivuna-type carbonaceous chondrites (CI chondrites) or related materials. Many small inclusions of voids and carbonaceous materials were detected in pyrrhotite, dolomite, breunnerite, and apatite. However, no fluid inclusions were observed, except for those in pyrrhotite that have already been reported. Magnetite exhibited a wide variety of morphologies, from irregular shapes (spherulites, framboids, plaquettes, and whiskers) to euhedral shapes (equants, rods, and cubes), along with transitional shapes. In contrast, the other minerals exhibit predominantly euhedral shapes (pyrrhotite: pseudo-hexagonal plates, dolomite: flattened rhombohedrons, breunnerite: largely flattened rhombohedrons, and apatite: hexagonal prisms) or aggregates of faceted crystals, except for Mg-Na phosphate. The matrices were heterogeneous with variable phyllosilicate particle sizes, Mg/Fe ratios, density (1.7 ± 0.2 g/cm3), nanoporosities (36 ± 9 %), and abundances of nanograins of Fe(-Ni) sulfides. The macroporosity of the particles was estimated as 12 ± 4 %. The observed textural relationships among the minerals suggest a precipitation sequence of: magnetite (spherulite → plaquette/framboid → rod/equant) → pyrrhotite (pentlandite → pyrrhotite) → apatite → dolomite → breunnerite → coarse phyllosilicates. Fe-bearing olivine (or low-Ca pyroxene) might have precipitated later than dolomite, indicating a high Mg activity in the aqueous solution. This precipitation sequence corresponds to a transition from irregular crystal forms (as seen in some magnetite) to regular forms of euhedral crystals (observed in some magnetite and other minerals). Based on the precipitation sequence and mineral morphologies, together with previously reported observations, a model for aqueous alteration in the Ryugu parent body was proposed as follows: CO2-H2O ice, amorphous silicates (GEMS-like material), and some minerals (mostly metal, sulfides, and anhydrous silicates) accumulated to form the parent body of Ryugu. Amorphous silicates and Fe-Ni metal quickly dissolved into the melted ice to form a highly supersaturated aqueous solution. Poorly-crystalized phyllosilicate and spherulitic magnetite precipitated first, followed by plaquette/framboidal magnetites with decreasing degree of supersaturation due to precipitation. Pseudo-hexagonal pyrrhotite plates were formed by dissolution and reprecipitation under relatively low supersaturation. Subsequently, apatite, dolomite, and breunnerite precipitated in this order in response to decreasing supersaturation.

    DOI： 10.1016/j.gca.2024.03.032

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  • The influence of chondrules on sub-mm fragment shape distributions in Allende impact experiments 査読

    Tatsuhiro Michikami, Axel Hagermann, Akira Tsuchiyama, Yushi Otsuka, Michihiko Nakamura, Satoshi Okumura, Harumasa Kano, Junya Matsuno, Sunao Hasegawa

    Icarus   415   116068 - 116068   2024年6月   （ ISSN:0019-1035 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

    DOI： 10.1016/j.icarus.2024.116068

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  • Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite

    Harries, D; Matsumoto, T; Langenhorst, F; Noguchi, T; Miyake, A; Igami, Y; Haruta, M; Seto, Y; Miyahara, M; Tomioka, N; Saito, H; Hata, S; Takigawa, A; Nakauchi, Y; Tachibana, S; Nakamura, T; Matsumoto, M; Ishii, HA; Bradley, JP; Ohtaki, K; Dobrica, E; Leroux, H; Le Guillou, C; Jacob, D; de la Pena, F; Laforet, S; Mouloud, BE; Marinova, M; Beck, P; Phan, VH; Rebois, R; Abreu, NM; Gray, J; Zega, T; Zanetta, PM; Thompson, MS; Stroud, R; Burgess, K; Cymes, BA; Bridges, JC; Hicks, L; Lee, MR; Daly, L; Bland, PA; Zolensky, ME; Frank, DR; Martinez, J; Tsuchiyama, A; Yasutake, M; Matsuno, J; Okumura, S; Mitsukawa, I; Uesugi, K; Uesugi, M; Takeuchi, A; Sun, MQ; Enju, S; Michikami, T; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, SI; Tsuda, Y

    METEORITICS & PLANETARY SCIENCE   59 ( 8 )   2134 - 2148   2024年5月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    出版者・発行元：Meteoritics and Planetary Science  

    Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of hydrous asteroids. The mechanisms of space weathering, its effects on mineral surfaces, and the characteristic time scales on which alteration occurs are central to understanding the spectroscopic properties and the taxonomy of asteroids in the solar system. Here, we investigate the behavior of the iron monosulfides mineral pyrrhotite (Fe1−xS) at the earliest stages of space weathering. Using electron microscopy methods, we identified a partially exposed pyrrhotite crystal that morphologically shows evidence for mass loss due to exposure to solar wind ion irradiation. We find that crystallographic changes to the pyrrhotite can be related to sulfur loss from its space-exposed surface and the diffusive redistribution of resulting excess iron into the interior of the crystal. Diffusion profiles allow us to estimate an order of magnitude of the exposure time of a few thousand years consistent with previous estimates of space exposure. During this interval, the adjacent phyllosilicates did not acquire discernable damage, suggesting that they are less susceptible to alteration by ion irradiation than pyrrhotite.

    DOI： 10.1111/maps.14176

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  • Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples 査読

    Matsumoto, T; Noguchi, T; Miyake, A; Igami, Y; Haruta, M; Seto, Y; Miyahara, M; Tomioka, N; Saito, H; Hata, S; Harries, D; Takigawa, A; Nakauchi, Y; Tachibana, S; Nakamura, T; Matsumoto, M; Ishii, HA; Bradley, JP; Ohtaki, K; Dobrica, E; Leroux, H; Le Guillou, C; Jacob, D; de la Peña, F; Laforet, S; Marinova, M; Langenhorst, F; Beck, P; Phan, THV; Rebois, R; Abreu, NM; Gray, J; Zega, T; Zanetta, PM; Thompson, MS; Stroud, R; Burgess, K; Cymes, BA; Bridges, JC; Hicks, L; Lee, MR; Daly, L; Bland, PA; Zolensky, ME; Frank, DR; Martinez, J; Tsuchiyama, A; Yasutake, M; Matsuno, J; Okumura, S; Mitsukawa, I; Uesugi, K; Uesugi, M; Takeuchi, A; Sun, MQ; Enju, S; Michikami, T; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, S; Tsuda, Y

    NATURE ASTRONOMY   8 ( 2 )   207 - 215   2024年2月   （ ISSN:2397-3366 eISSN:2397-3366 ）

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    掲載種別：研究論文（学術雑誌）   出版者・発行元：Nature Astronomy  

    Large amounts of nitrogen compounds, such as ammonium salts, may be stored in icy bodies and comets, but the transport of these nitrogen-bearing solids into the near-Earth region is not well understood. Here, we report the discovery of iron nitride on magnetite grains from the surface of the near-Earth C-type carbonaceous asteroid Ryugu, suggesting inorganic nitrogen fixation. Micrometeoroid impacts and solar wind irradiation may have caused the selective loss of volatile species from major iron-bearing minerals to form the metallic iron. Iron nitride is a product of nitridation of the iron metal by impacts of micrometeoroids that have higher nitrogen contents than the CI chondrites. The impactors are probably primitive materials with origins in the nitrogen-rich reservoirs in the outer Solar System. Our observation implies that the amount of nitrogen available for planetary formation and prebiotic reactions in the inner Solar System is greater than previously recognized.

    DOI： 10.1038/s41550-023-02137-z

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  • Influx of nitrogen-rich material from the outer Solar System indicated by iron nitride in Ryugu samples

    Matsumoto Toru, Noguchi Takaaki, Miyake Akira, Igami Yohei, Haruta Mitsutaka, Seto Yusuke, Miyahara Masaaki, Tomioka Naotaka, Saito Hikaru, Hata Satoshi, Harries Dennis, Takigawa Aki, Nakauchi Yusuke, Tachibana Shogo, Nakamura Tomoki, Matsumoto Megumi, Ishii Hope A., Bradley John P., Ohtaki Kenta, Dobrică Elena, Leroux Hugues, Le Guillou Corentin, Jacob Damien, de la Peña Francisco, Laforet Sylvain, Marinova Maya, Langenhorst Falko, Beck Pierre, Phan Thi H. V., Rebois Rolando, Abreu Neyda M., Gray Jennifer, Zega Thomas, Zanetta Pierre-M., Thompson Michelle S., Stroud Rhonda, Burgess Kate, Cymes Brittany A., Bridges John C., Hicks Leon, Lee Martin R., Daly Luke, Bland Phil A., Zolensky Michael E., Frank David R., Martinez James, Tsuchiyama Akira, Yasutake Masahiro, Matsuno Junya, Okumura Shota, Mitsukawa Itaru, Uesugi Kentaro, Uesugi Masayuki, Takeuchi Akihisa, Sun Mingqi, Enju Satomi, Michikami Tatsuhiro, Yurimoto Hisayoshi, Okazaki Ryuji, Yabuta Hikaru, Naraoka Hiroshi, Sakamoto Kanako, Yada Toru, Nishimura Masahiro, Nakato Aiko, Miyazaki Akiko, Yogata Kasumi, Abe Masanao, Okada Tatsuaki, Usui Tomohiro, Yoshikawa Makoto, Saiki Takanao, Tanaka Satoshi, Terui Fuyuto, Nakazawa Satoru, Watanabe Sei-ichiro, Tsuda Yuichi

    Nature Astronomy   8 ( 2 )   207 - 215   2024年2月   （ eISSN:23973366 ）

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    記述言語：英語  

    Large amounts of nitrogen compounds, such as ammonium salts, may be stored in icy bodies and comets, but the transport of these nitrogen-bearing solids into the near-Earth region is not well understood. Here, we report the discovery of iron nitride on magnetite grains from the surface of the near-Earth C-type carbonaceous asteroid Ryugu, suggesting inorganic nitrogen fixation. Micrometeoroid impacts and solar wind irradiation may have caused the selective loss of volatile species from major iron-bearing minerals to form the metallic iron. Iron nitride is a product of nitridation of the iron metal by impacts of micrometeoroids that have higher nitrogen contents than the CI chondrites. The impactors are probably primitive materials with origins in the nitrogen-rich reservoirs in the outer Solar System. Our observation implies that the amount of nitrogen available for planetary formation and prebiotic reactions in the inner Solar System is greater than previously recognized.

    CiNii Research

  • Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro- to nano-scale

    Stroud R.M., Barosch J., Bonal L., Burgess K., Cody G.D., De Gregorio B.T., Daly L., Dartois E., Dobrică E., Duprat J., Engrand C., Harries D., Hashiguchi M., Ishii H., Kebukawa Y., Kilcoyne A.D., Langenhorst F., Lee M.R., Nittler L.R., Quirico E., Okumura T., Remusat L., Sandford S., Yabuta H., Abe M., Abreu N.M., Bagot P.A.J., Beck P., Bejach L., Bland P.A., Bridges J.C., Cymes B.A., Dazzi A., de la Peña F., Deniset-Besseau A., Enju S., Enokido Y., Frank D.R., Gray J., Haruta M., Hata S., Hicks L., Igami Y., Jacob D., Kamide K., Komatsu M., Laforet S., Leroux H., Le Guillou C., Martins Z., Marinova M., Martinez J., Mathurin J., Matsumoto M., Matsumoto T., Matsuno J., McFadzean S., Michikami T., Mitsukawa I., Miyake A., Miyahara M., Miyazaki A., Montagnac G., Mostefaoui S., Nakamura T., Nakato A., Naraoka H., Nakauchi Y., Nakazawa S., Nishimura M., Noguchi T., Ohtaki K., Ohigashi T., Okada T., Okumura S., Okazaki R., Phan T.H.V., Rebois R., Sakamoto K., Saiki T., Saito H., Seto Y., Shigenaka M., Smith W., Suga H., Sun M., Tachibana S., Takahashi Y., Takeichi Y., Takeuchi A., Takigawa A., Tamenori Y., Tanaka S., Terui F., Thompson M.S., Tomioka N., Tsuchiyama A., Tsuda Y., Uesugi K., Uesugi M.

    Meteoritics and Planetary Science   59 ( 8 )   2023 - 2043   2024年1月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    掲載種別：研究論文（学術雑誌）   出版者・発行元：Meteoritics and Planetary Science  

    Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that have experienced low-temperature aqueous alteration. Both nanoglobules and diffuse organic matter are abundant. Non-globular organic particles are also present, and including some that contain nanodiamond clusters. Diffuse organic matter is finely distributed in and around phyllosilicates, forms coatings on other minerals, and is also preserved in vesicles in secondary minerals such as carbonate and pyrrhotite. The average elemental compositions determined by energy-dispersive spectroscopy of extracted, demineralized insoluble organic matter samples A0107 and C0106 are C100N3O9S1 and C100N3O7S1, respectively, with the difference in O/C slightly outside the difference in the standard error of the mean. The functional chemistry of the nanoglobules varies from mostly aromatic C=C to mixtures of aromatic C=C, ketone C=O, aliphatic (CHn), and carboxyl (COOH) groups. Diffuse organic matter associated with phyllosilicates has variable aromatic C, ketone and carboxyl groups, and some localized aliphatics, but is dominated by molecular carbonate (CO3) absorption, comparable to prior observations of clay-bound organic matter in CI meteorites.

    DOI： 10.1111/maps.14128

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  • Four‐dimensional‐STEM analysis of the phyllosilicate‐rich matrix of Ryugu samples

    Bahae‐eddine Mouloud, Damien Jacob, Francisco de la Peña, Maya Marinova, Corentin Le Guillou, Jean‐Christophe Viennet, Sylvain Laforet, Hugues Leroux, Adrien Teurtrie, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrica, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre‐M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda

    METEORITICS & PLANETARY SCIENCE   59 ( 8 )   2002 - 2022   2024年1月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Meteoritics and Planetary Science  

    Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate‐rich matrix with four‐dimensional scanning transmission electron microscopy (4D‐STEM). We have identified and mapped the mineral phases at the nanometer scale (serpentine, smectite, pyrrhotite), observed the presence of Ni‐bearing pyrrhotite, and identified the serpentine polymorph as lizardite, in agreement with the reported aqueous alteration history of Ryugu. Furthermore, we have mapped the d‐spacings of smectite and observed a broad distribution of values, ranging from 1 to 2 nm, with an average d‐spacing of 1.24 nm, indicating significant heterogeneity within the sample. Such d‐spacing variability could be the result of either the presence of organic matter trapped in the interlayers or the influence of various geochemical conditions at the submicrometer scale, suggestive of a range of organic compounds and/or changes in smectite crystal chemistry.

    DOI： 10.1111/maps.14124

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  • Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid Ryugu

    Matsumoto, M; Matsuno, J; Tsuchiyama, A; Nakamura, T; Enokido, Y; Kikuiri, M; Nakato, A; Yasutake, M; Uesugi, K; Takeuchi, A; Enju, S; Okumura, S; Mitsukawa, I; Sun, MQ; Miyake, A; Haruta, M; Igami, Y; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Zolensky, M; Yada, T; Nishimura, M; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, S; Tsuda, Y

    SCIENCE ADVANCES   10 ( 3 )   eadi7203   2024年1月   （ ISSN:2375-2548 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Science Advances  

    The Hayabusa2 spacecraft delivered samples of the carbonaceous asteroid Ryugu to Earth. Some of the sample particles show evidence of micrometeoroid impacts, which occurred on the asteroid surface. Among those, particles A0067 and A0094 have flat surfaces on which a large number of microcraters and impact melt splashes are observed. Two impact melt splashes and one microcrater were analyzed to unveil the nature of the objects that impacted the asteroid surface. The melt splashes consist mainly of Mg-Fe–rich glassy silicates and Fe-Ni sulfides. The microcrater trapped an impact melt consisting mainly of Mg-Fe–rich glassy silicate, Fe-Ni sulfides, and minor silica-rich glass. These impact melts show a single compositional trend indicating mixing of Ryugu surface materials and impactors having chondritic chemical compositions. The relict impactor in one of the melt splashes shows mineralogical similarity with anhydrous chondritic interplanetary dust particles having a probable cometary origin. The chondritic micrometeoroids probably impacted the Ryugu surface during its residence in a near-Earth orbit.

    DOI： 10.1126/sciadv.adi7203

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  • In situ investigation of an organic micro‐globule and its mineralogical context within a Ryugu “sand” grain

    Van T. H. Phan, Pierre Beck, Rolando Rebois, Eric Quirico, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre‐M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Jérémie Mathurin, Alexandre Dazzi, Emmanuel Dartois, Cécile Engrand, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Peter Hoppe, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda

    METEORITICS & PLANETARY SCIENCE   59 ( 8 )   1983 - 2001   2024年1月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Meteoritics and Planetary Science  

    The Hayabusa2 mission from the Japan Aerospace Exploration Agency (JAXA) returned to the Earth samples of carbonaceous asteroid (162173) Ryugu. This mission offers a unique opportunity to investigate in the laboratory samples from a C‐type asteroid, without physical or chemical alteration by the terrestrial atmosphere. Here, we report on an investigation of the mineralogy and the organo‐chemistry of Hayabusa2 samples using a combination of micro‐ and nano‐infrared spectroscopy. Particles investigated with conventional FTIR spectroscopy have spectra dominated by phyllosilicate‐related absorption, as observed for samples of CI‐chondrites, selected ungrouped carbonaceous chondrites, and selected hydrated micrometeorites. Ryugu samples show smaller sulfate‐related absorption than CI‐chondrites. Our samples that were only briefly exposed to the Earth atmosphere show absorptions related to molecular water, revealing fast terrestrial contamination of the spectral signature at 3 μm. Overall, our FTIR data are in agreement with other work done on Ryugu samples, revealing a low degree of mineralogical variability across Ryugu samples. AFM‐IR mapping of the grains shows the presence of a micrometer‐sized organic globule in one of our analyzed grains. The AFM‐IR spectra obtained on this globule are similar to IR spectra obtained on IOM suggesting that it is constituted of refractory organic matter. This globule may host silicate in its interior, with a different mineralogy than bulk Ryugu phyllosilicate. The shape, presence of peculiar silicate, and the nature of organic constituting the globule point toward a pre‐accretionary origin of this globule and that at least part of Ryugu organics were inherited from the protosolar nebulae or the interstellar media. Altogether, our results show the similarities between Ryugu samples and CI chondrites.

    DOI： 10.1111/maps.14122

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  • Synthesis of Tungsten-Tantalum Alloy Nanoparticles by Induction Thermal Plasma

    Hirose M., Yamashita K., Matsuno J., Tanaka M., Watanabe T.

    IEEE International Conference on Plasma Science   2024年   （ ISSN:07309244 ISBN:9798350360912 ）

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    出版者・発行元：IEEE International Conference on Plasma Science  

    Refractory metal-based alloy nanoparticles are attractive material due to high hardness, high thermal conductivity, and great thermal resistance1. Synthesis methods of refractory metal-based alloys with a high processing rate are limited because of their high melting point, and other synthesis methods need to be established. Induction thermal plasma is considered as one of effective synthesis methods of refractory metal nanoparticles, due to high enthalpy, flexible atmosphere selection, and strong quenching effect. The purpose of this study is to synthesize tungsten-based alloy nanoparticles by induction thermal plasma and investigate the effects of physical properties on the composition and crystal structure of the products.

    DOI： 10.1109/ICOPS58192.2024.10626598

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  • Synthesis of Tantalum Nitride Nanoparticles by Induction Thermal Plasma

    Zhang K., Hirose M., Wang Y., Matsuno J., Tanaka M., Watanabe T.

    IEEE International Conference on Plasma Science   2024年   （ ISSN:07309244 ISBN:9798350360912 ）

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    出版者・発行元：IEEE International Conference on Plasma Science  

    Tantalum nitrides attract much attention due to brilliant thermal stability, high dielectric constant, and unique optoelectronic properties. Therefore, tantalum nitrides have been widely applied on many fields, like water splitting catalyst, capacitor, and conductive barrier layer in integrated circuit manufacturing1. Abundant types of stable phases exist in Ta-N system, like TaN0.5, TaN0.8, TaN, Ta3N5, and Ta5N62. Moreover, TaN exhibits two different structures of δ-phase (high temperature phase) and ε-phase (low temperature phase) under different quenching conditions.

    DOI： 10.1109/ICOPS58192.2024.10625940

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  • Synthesis of transition metal nitride nanoparticles by DC arc based on the nitridation mechanism

    Nogami H., Hirose M., Takemoto Y., Matsuno J., Tanaka M., Watanabe T.

    IEEE International Conference on Plasma Science   2024年   （ ISSN:07309244 ISBN:9798350360912 ）

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    出版者・発行元：IEEE International Conference on Plasma Science  

    Transition metal nitride nanoparticles are promising material in electronics field because of their many attractive features such as high electrical conductivity, corrosion resistance, and so on1. The development of mass synthesis methods for them with high purity is required, and thermal plasma is one of the candidates with their several advantages such as high enthalpy and high chemical reactivity. DC arc is a practical and versatile method to generate thermal plasma because of its high thermal efficiency and stable discharge. The purpose of this study is to synthesize transition metal nitride nanoparticles by DC arc and clarify the nitridation mechanism of metal nitride nanoparticles.

    DOI： 10.1109/ICOPS58192.2024.10626277

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  • Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil

    Hugues Leroux, Corentin Le Guillou, Maya Marinova, Sylvain Laforet, Jean‐Christophe Viennet, Bahae‐Eddine Mouloud, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Daniel Hallatt, Mario Pelaez Fernandez, David Troadec, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre‐M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐Ichiro Watanabe, Yuichi Tsuda

    METEORITICS & PLANETARY SCIENCE   59 ( 8 )   1947 - 1965   2023年11月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Meteoritics and Planetary Science  

    Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They resemble CI chondrites material, thus showing clear evidence of extensive aqueous alteration attested by the widespread presence of a mixture of serpentine and saponite. We present here a scanning transmission electron microscopy study of the Ryugu dominant lithology of the phyllosilicate matrix at the nanometer scale, which we compare with that of the Orgueil CI chondrite. In both objects, the phyllosilicates are of comparable nature and texture, consisting of a mixture of small‐sized crystallites of serpentine and saponite. At the micrometer scale or less, the texture is an alternation of fine and coarse domains. The fine‐grained regions are dominated by saponite. In Ryugu, they enclose numerous Fe,Ni nanosulfides, whereas in Orgueil, S‐ and Ni‐rich ferrihydrite is abundant. The coarse‐grained regions contain more serpentine and no or little Fe,Ni sulfides or ferrihydrite. Scanning transmission x‐ray microscopy at the Fe‐L3 edge also reveals that iron valency of phyllosilicates is higher and more homogeneous in Orgueil (~70% Fe3+) than in Ryugu (<50% Fe3+). We interpret the observed textures as being mostly a consequence of aqueous alteration, likely resulting from the replacement by phyllosilicates of submicrometric components, initially agglomerated by a primary accretion. The fine‐grained domains may result from the replacement of GEMS (GEMS—glass with embedded metal and sulfides) objects or from other types of nanometric assemblages of silicate and Fe‐based nanophases. On the other hand, the coarse‐grained regions may correspond to the replacement of anhydrous crystalline silicates of the olivine and pyroxene type. The major difference is the presence of Fe,Ni sulfides in Ryugu and of ferrihydrite and higher iron valency of phyllosilicates in Orgueil. This might be due to long‐term terrestrial weathering that would have destabilized the nanosulfides. We also explore an alternative scenario involving more oxidizing hydrothermal conditions on the Orgueil parent body.

    DOI： 10.1111/maps.14101

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  • Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu

    Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Bahae‐Eddine Mouloud, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre‐M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, William A. Smith, Sam McFadzean, Pierre‐Etienne Martin, Paul A. J. Bagot, Dennis Fougerouse, David W. Saxey, Steven Reddy, William D. A. Rickard, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Peter Hoppe, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda

    METEORITICS & PLANETARY SCIENCE   59 ( 8 )   1877 - 1906   2023年11月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Meteoritics and Planetary Science  

    Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI chondrites and some types of space weathering. We report detailed mineralogy of the fine‐grained Ryugu samples allocated to our “Sand” team and report additional space weathering features found on the grains. The dominant mineralogy is composed of a fine‐grained mixture of Mg‐rich saponite and serpentine, magnetite, pyrrhotite, pentlandite, dolomite, and Fe‐bearing magnesite. These grains have mineralogy comparable to that of CI chondrites, showing severe aqueous alteration but lacking ferrihydrite and sulfate. These results are similar to previous works on large Ryugu grains. In addition to the major minerals, we also find many minerals that are rare or have not been reported among CI chondrites. Accessory minerals identified are hydroxyapatite, Mg‐Na phosphate, olivine, low‐Ca pyroxene, Mg‐Al spinel, chromite, manganochromite, eskolaite, ilmenite, cubanite, polydymite, transjordanite, schreibersite, calcite, moissanite, and poorly crystalline phyllosilicate. We also show scanning transmission electron microscope and scanning electron microscope compositional maps and images of some space‐weathered grains and severely heated and melted grains. Although our mineralogical results are consistent with that of millimeter‐sized grains, the fine‐grained fraction is best suited to investigate impact‐induced space weathering.

    DOI： 10.1111/maps.14093

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  • Nonequilibrium spherulitic magnetite in the Ryugu samples

    Elena Dobrică, Hope A. Ishii, John P. Bradley, Kenta Ohtaki, Adrian J. Brearley, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H.V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Hisayoshi Yurimoto, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei ichiro Watanabe, Yuichi Tsuda

    GEOCHIMICA ET COSMOCHIMICA ACTA   346   65 - 75   2023年4月   （ ISSN:0016-7037 eISSN:1872-9533 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Geochimica et Cosmochimica Acta  

    We have investigated several particles collected during each of two touchdowns of the Hayabusa2 spacecraft at the surface of the C-type asteroid 162173 Ryugu using various electron microscope techniques. Our detailed transmission electron microscopy study shows the presence of magnetite with various morphologies coexisting in close proximity. This is characteristic of CI chondrite-like materials and consistent with the mineral assemblages and compositions in the Ryugu parent body. We describe the microstructural characteristics of magnetite with different morphologies, which could have resulted from the chemical conditions (growth vs. diffusion rate) during their formation. Furthermore, we describe the presence of magnetites with a spherulitic structure composed of individual radiating fibers that are characterized by pervasive, homogeneously distributed euhedral to subhedral pores that have not been described in previous chondrite studies. This particular spherulitic structure is consistent with crystallization under nonequilibrium conditions. Additionally, the presence of a high density of defects within the magnetite fibers, the high surface/volume ratio of this morphology, and the presence of amorphous materials in several pores and at the edges of the acicular fibers further support their formation under nonequilibrium conditions. We suggest that the growth processes that lead to this structure result from the solution reaching a supersaturated state, resulting in an adjustment to a lower free energy condition via nucleation and rapid growth.

    DOI： 10.1016/j.gca.2023.02.003

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  • Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples

    T. Nakamura, M. Matsumoto, K. Amano, Y. Enokido, M. E. Zolensky, T. Mikouchi, H. Genda, S. Tanaka, M. Y. Zolotov, K. Kurosawa, S. Wakita, R. Hyodo, H. Nagano, D. Nakashima, Y. Takahashi, Y. Fujioka, M. Kikuiri, E. Kagawa, M. Matsuoka, A. J. Brearley, A. Tsuchiyama, M. Uesugi, J. Matsuno, Y. Kimura, M. Sato, R. E. Milliken, E. Tatsumi, S. Sugita, T. Hiroi, K. Kitazato, D. Brownlee, D. J. Joswiak, M. Takahashi, K. Ninomiya, T. Takahashi, T. Osawa, K. Terada, F. E. Brenker, B. J. Tkalcec, L. Vincze, R. Brunetto, A. Aléon-Toppani, Q. H. S. Chan, M. Roskosz, J.-C. Viennet, P. Beck, E. E. Alp, T. Michikami, Y. Nagaashi, T. Tsuji, Y. Ino, J. Martinez, J. Han, A. Dolocan, R. J. Bodnar, M. Tanaka, H. Yoshida, K. Sugiyama, A. J. King, K. Fukushi, H. Suga, S. Yamashita, T. Kawai, K. Inoue, A. Nakato, T. Noguchi, F. Vilas, A. R. Hendrix, C. Jaramillo-Correa, D. L. Domingue, G. Dominguez, Z. Gainsforth, C. Engrand, J. Duprat, S. S. Russell, E. Bonato, C. Ma, T. Kawamoto, T. Wada, S. Watanabe, R. Endo, S. Enju, L. Riu, S. Rubino, P. Tack, S. Takeshita, Y. Takeichi, A. Takeuchi, A. Takigawa, D. Takir, T. Tanigaki, A. Taniguchi, K. Tsukamoto, T. Yagi, S. Yamada, K. Yamamoto, Y. Yamashita, M. Yasutake, K. Uesugi, I. Umegaki, I. Chiu, T. Ishizaki, S. Okumura, E. Palomba, C. Pilorget, S. M. Potin, A. Alasli, S. Anada, Y. Araki, N. Sakatani, C. Schultz, O. Sekizawa, S. D. Sitzman, K. Sugiura, M. Sun, E. Dartois, E. De Pauw, Z. Dionnet, Z. Djouadi, G. Falkenberg, R. Fujita, T. Fukuma, I. R. Gearba, K. Hagiya, M. Y. Hu, T. Kato, T. Kawamura, M. Kimura, M. K. Kubo, F. Langenhorst, C. Lantz, B. Lavina, M. Lindner, J. Zhao, B. Vekemans, D. Baklouti, B. Bazi, F. Borondics, S. Nagasawa, G. Nishiyama, K. Nitta, J. Mathurin, T. Matsumoto, I. Mitsukawa, H. Miura, A. Miyake, Y. Miyake, H. Yurimoto, R. Okazaki, H. Yabuta, H. Naraoka, K. Sakamoto, S. Tachibana, H. C. Connolly, D. S. Lauretta, M. Yoshitake, M. Yoshikawa, K. Yoshikawa, K. Yoshihara, Y. Yokota, K. Yogata, H. Yano, Y. Yamamoto, D. Yamamoto, M. Yamada, T. Yamada, T. Yada, K. Wada, T. Usui, R. Tsukizaki, F. Terui, H. Takeuchi, Y. Takei, A. Iwamae, H. Soejima, K. Shirai, Y. Shimaki, H. Senshu, H. Sawada, T. Saiki, M. Ozaki, G. Ono, T. Okada, N. Ogawa, K. Ogawa, R. Noguchi, H. Noda, M. Nishimura, N. Namiki, S. Nakazawa, T. Morota, A. Miyazaki, A. Miura, Y. Mimasu, K. Matsumoto, K. Kumagai, T. Kouyama, S. Kikuchi, K. Kawahara, S. Kameda, T. Iwata, Y. Ishihara, M. Ishiguro, H. Ikeda, S. Hosoda, R. Honda, C. Honda, Y. Hitomi, N. Hirata, N. Hirata, T. Hayashi, M. Hayakawa, K. Hatakeda, S. Furuya, R. Fukai, A. Fujii, Y. Cho, M. Arakawa, M. Abe, S. Watanabe, Y. Tsuda

    SCIENCE   379 ( 6634 )   787 - +   2023年2月   （ ISSN:0036-8075 eISSN:1095-9203 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Science  

    Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed 17 Ryugu samples measuring 1 to 8 millimeters. Carbon dioxide–bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu’s parent asteroid formed in the outer Solar System. The samples contain low abundances of materials that formed at high temperatures, such as chondrules and calcium- and aluminum-rich inclusions. The samples are rich in phyllosilicates and carbonates, which formed through aqueous alteration reactions at low temperature, high pH, and water/rock ratios of <1 (by mass). Less altered fragments contain olivine, pyroxene, amorphous silicates, calcite, and phosphide. Numerical simulations, based on the mineralogical and physical properties of the samples, indicate that Ryugu’s parent body formed ~2 million years after the beginning of Solar System formation.

    DOI： 10.1126/science.abn8671

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  • A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu 査読

    Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre-M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naru Hirata, Naoyuki Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kousuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, 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, Ryudo Tsukizaki, Koji Wada, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Ryohta Fukai, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako I. Suzuki, Tomohiro Usui, Toru Yada, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Harold C. Connolly, Dante S. Lauretta, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda

    NATURE ASTRONOMY   7 ( 2 )   170 - 181   2022年12月   （ ISSN:2397-3366 eISSN:23973366 ）

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    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer Nature  

    Without a protective atmosphere, space-exposed surfaces of airless Solar System bodies gradually experience an alteration in composition, structure and optical properties through a collective process called space weathering. The return of samples from near-Earth asteroid (162173) Ryugu by Hayabusa2 provides the first opportunity for laboratory study of space-weathering signatures on the most abundant type of inner solar system body: a C-type asteroid, composed of materials largely unchanged since the formation of the Solar System. Weathered Ryugu grains show areas of surface amorphization and partial melting of phyllosilicates, in which reduction from Fe3+ to Fe2+ and dehydration developed. Space weathering probably contributed to dehydration by dehydroxylation of Ryugu surface phyllosilicates that had already lost interlayer water molecules and to weakening of the 2.7 µm hydroxyl (–OH) band in reflectance spectra. For C-type asteroids in general, this indicates that a weak 2.7 µm band can signify space-weathering-induced surface dehydration, rather than bulk volatile loss.

    DOI： 10.1038/s41550-022-01841-6

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    その他リンク： https://www.nature.com/articles/s41550-022-01841-6

  • UPDATE ON MEASUREMENT OF THE COMPOSITION OF RYUGU FLUID INCLUSIONS

    Zolensky, M; Dolocan, A; Bodnar, R; Gearba, I; Martinez, J; Han, J; Nakamura, T; Tsuchiyama, A; Matsuno, J; Sun, M; Matsumoto, M; Fujioka, Y; Enokido, Y; Uesugi, K; Takeuchi, A; Yasutake, M; Miyake, A; Okumura, S; Mitsukawa, I; Takigawa, A; Mikouchi, T; Enju, S; Morita, T; Kikuiri, M; Amano, K; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

    METEORITICS & PLANETARY SCIENCE   57   2022年8月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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  • 3D MORPHOLOGIES OF MAGNETITE, SULFIDES, CARBONATES AND PHOSPHATES IN RYUGU SAMPLES AND THEIR CRYSTALLIZATION SEQUENCE DURING AQUEOUS ALTERATION.

    Tsuchiyama, A; Matsumoto, M; Matsuno, J; Nakamura, T; Noguchi, T; Yasutake, M; Uesugi, K; Takeuchi, A; Miyake, A; Okumura, S; Enju, S; Mitsukawa, I; Fujioka, Y; Sun, M; Takigawa, A; Enokido, Y; Kawamoto, T; Morita, T; Kikuiri, M; Amano, K; Kagawa, E; Matsumoto, T; Nakano, N; Rubino, S; Nakano, T; Yurimoto, H; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

    METEORITICS & PLANETARY SCIENCE   57   2022年8月   （ ISSN:1086-9379 eISSN:1945-5100 ）

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  • ACQUEOUS ALTERATION PROBED BY MUTLI-ASSEMBLY AND 3D HETEROGENEITY IN SMALL RYUGU FRAGMENTS

    Dionnet, Z; Aléon-Toppani, A; Brunetto, R; Rubino, S; Nakamura, T; Baklouti, D; Djouadi, Z; Lantz, C; Mivumbi, O; Borondics, F; Héripré, E; Troadec, D; Tsuchiyama-, A; Matsuno, J; Matsumoto, M; Morita, T; Kikuiri, M; Amano, K; Kagawa, E; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sa-Kamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

    METEORITICS & PLANETARY SCIENCE   57   2022年8月   （ ISSN:1086-9379 eISSN:1945-5100 ）

    　詳細を見る

  • ANALYSIS OF "STONE" SAMPLES FROM C-TYPE ASTEROID RYUGU.

    Nakamura, T; Matsumoto, M; Amano, K; Enokido, Y; Zolensky, M; Mikouchi, T; Genda, H; Tanaka, S; Zolotov, Y; Kurosawa, K; Wakita, S; Hyodo, R; Nagano, H; Nakashima, D; Takahashi, Y; Fujioka, Y; Kikuiri, M; Kagawa, E; Matsuoka, M; Brearley, AJ; Tsuchiyama, A; Uesugi, M; Matsuno, J; Kimura, Y; Sato, M; Milliken, RE; Tatsumi, E; Sugita, S; Hiroi, T; Kitazato, K; Brownlee, D; Joswiak, DJ; Takahashi, M; Ninomiya, K; Takahashi, T; Osawa, T; Terada, K; Brenker, FE; Tkalcec, BJ; Vincze, L; Brunetto, R; Aleon-Toppani, A; Chan, Q; Roskosz, M; Viennet, JC; Beck, P; Alp, E; Michikami, I; Nagaashi, Y; Tsuji, T; Ino, Y; Martinez, J; Han, J; Dolocan, A; Bodnar, RJ; Tanaka, M; Yoshida, H; Sugiyama, K; King, AJ; Fukushi, K; Suga, H; Yamashita, S; Kawai, T; Inoue, K; Nakato, A; Noguchi, T; Vilas, F; Hendrix, AR; Jaramillo, C; Domingue, DL; Dominguez, G; Gainsforth, Z; Engrand, C; Duprat, J; Russell, SS; Bonato, E; Ma, C; Kawamoto, T; Yurimoto, H; Okazaki, R; Naraoka, H; Sakamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

    METEORITICS & PLANETARY SCIENCE   57   2022年8月   （ ISSN:1086-9379 eISSN:1945-5100 ）

    　詳細を見る

  • Condensation of cometary silicate dust using an induction thermal plasma system II. Mg–Fe–Si–O–S system and the effects of sulfur and redox conditions 査読

    661   A121 - A121   2022年5月   （ ISSN:0004-6361 eISSN:1432-0746 ）

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    Glass with embedded metal and sulfides (GEMS), the major components of chondritic-porous interplanetary dust particles (CP-IDPs), is one of the most primitive materials in the Solar System and may be analogous to the amorphous silicate dust observed in various astronomical environments. Mineralogical characteristics of GEMS should reflect their formation process and condition. In this study, synthetic experiments in the sulfur-bearing system of Fe–Mg–Si–O–S were performed with a systematic change in redox conditions using thermal plasma systems to reproduce the mineralogy and textures of GEMS. The resulting condensates were composed of amorphous silicates with Fe-bearing nano-inclusions. The Fe content and texture in the amorphous silicates as well as the mineral phases of the nanoparticles correlate with redox conditions. Fe dissolved in the amorphous silicate as FeO in oxidizing conditions formed Fe-metal nanoparticles in intermediate redox conditions, and gupeiite (Fe3 Si) nanoparticles in reducing conditions. In intermediate to reducing redox conditions, Fe-poor amorphous silicate formed a biphasic texture with Mg- and Si-rich regions, indicating liquid immiscibility during the melt phase. Most Fe-metal particles were surrounded by FeS and formed on the surface of amorphous silicate grains. Condensates produced in intermediate to slightly reducing redox conditions resemble GEMS in that they have similar mineral assemblages and chemical compositions to amorphous silicate, except that the Fe-metal grains are absent from the interior of the amorphous silicate grains. This textural difference can be explained by the sulfidation at high temperatures in this study, in contrast to sulfidation occurring at low temperatures in the presence of H2 in natural GEMS formation. Based on the two-liquid structures observed in the experimental products and in GEMS, also recognized in infrared spectra, we propose that GEMS condensed as silicate melt under limited redox conditions followed by incorporation of multiple metal grains into the silicate melt or by aggregation of coreshell structured grains before sulfidation of the metallic iron. Condensates produced in oxidizing conditions are similar to GEMS-like material in the matrices of primitive carbonaceous chondrite meteorites, indicating the possibility that they form by direct condensation from nebula gas in relatively oxidizing conditions compared to GEMS.

    DOI： 10.1051/0004-6361/202142620

    researchmap

  • Three-dimensional microstructure and mineralogy of a cosmic symplectite in the Acfer 094 carbonaceous chondrite: Implication for its origin

    Megumi Matsumoto, Akira Tsuchiyama, Akira Miyake, Motoo Ito, Junya Matsuno, Kentaro Uesugi, Akihisa Takeuchi, Yu Kodama, Masahiro Yasutake, Epifanio Vaccaro

    Geochimica et Cosmochimica Acta   323   220 - 241   2022年4月   （ ISSN:0016-7037 ）

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

    DOI： 10.1016/j.gca.2022.02.024

    researchmap

  • Three-dimensional observation of GEMS grains: Their high-temperature condensation origin

    Junya Matsuno, Akira Tsuchiyama, Akira Miyake, Keiko Nakamura-Messenger, Scott Messenger

    Geochimica et Cosmochimica Acta   320   207 - 222   2022年3月   （ ISSN:0016-7037 ）

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier {BV}  

    DOI： 10.1016/j.gca.2021.12.031

    researchmap

  • Condensation of cometary silicate dust using an induction thermal plasma system

    T. H. Kim, A. Takigawa, A. Tsuchiyama, J. Matsuno, S. Enju, H. Kawano, H. Komaki

    Astronomy & Astrophysics   656   A42 - A42   2021年12月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1051/0004-6361/202141216

  • Condensation of Glass with Multimetal Nanoparticles: Implications for the Formation Process of GEMS Grains

    Junya Matsuno, Akira Tsuchiyama, Takayuki Watanabe, Manabu Tanaka, Aki Takigawa, Satomi Enju, Chiyoe Koike, Hiroki Chihara, Akira Miyake

    The Astrophysical Journal   911 ( 1 )   47 - 47   2021年4月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.3847/1538-4357/abe5a0

  • Discovery of fossil asteroidal ice in primitive meteorite Acfer 094

    Megumi Matsumoto, Akira Tsuchiyama, Aiko Nakato, Junya Matsuno, Akira Miyake, Akimasa Kataoka, Motoo Ito, Naotaka Tomioka, Yu Kodama, Kentaro Uesugi, Akihisa Takeuchi, Tsukasa Nakano, Epifanio Vaccaro

    Science Advances   5 ( 11 )   2019年11月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1126/sciadv.aax5078

  • Formation of Transition Alumina Dust around Asymptotic Giant Branch Stars: Condensation Experiments using Induction Thermal Plasma Systems

    Aki Takigawa, Tae Hee Kim, Yohei Igami, Tatsuki Umemoto, Akira Tsuchiyama, Chiyoe Koike, Junya Matsuno, Takayuki Watanabe

    Astrophysical Journal Letters   878 ( 1 )   2019年6月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.3847/2041-8213/ab1f80

  • XANES spectra of forsterite in crystal, surface, and amorphous states

    Osamu Takahashi, Yusuke Tamenori, Taiga Suenaga, Tomoko Ikeda-Fukazawa, Junya Matsuno, Akira Tsuchiyama

    AIP Advances   8 ( 2 )   2018年2月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1063/1.5017245

  • Variations in the Infrared Spectra of Wüstite with Defects and Disorder

    845 ( 2 )   115 - 115   2017年8月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    The presence of FeO particles in circumstellar space has been suggested based on the observation of a mysterious 21 μm emission band. However, the complete infrared spectra of FeO have not been obtained so far; hence, data of the infrared (IR) spectra of FeO need to be investigated. We prepared synthetic and commercial samples of FeO, which were obtained by crushing bulk samples, annealing iron oxalate dihydrate (${mathrm{FeC } }_{2}{ {
    m{O } } }_{4}cdot 2{ {
    m{H } } }_{2}{
    m{O } }$), and mechanical milling of a powder mixture comprising (Fe and ${mathrm{Fe } }_{2}{ {
    m{O } } }_{3}$) particles with different milling times. We present a new study on the IR spectra of these samples, and show that these spectra changed according to defects and disorders. Furthermore, FeO particles are very sensitive to oxygen fugacity and temperature. The spectra of FeO particles were compared with the unidentified observed feature. It may be difficult for FeO particles to exist alone in the ISM and circumstellar space. This may be connected to the problem of missing iron in the ISM.

    DOI： 10.3847/1538-4357/aa7deb

  • Evolution of Morphological and Physical Properties of Laboratory Interstellar Organic Residues with Ultraviolet Irradiation 査読

    L. Piani, S. Tachibana, T. Hama, H. Tanaka, Y. Endo, I. Sugawara, L. Dessimoulie, Y. Kimura, A. Miyake, J. Matsuno, A. Tsuchiyama, K. Fujita, S. Nakatsubo, H. Fukushi, S. Mori, T. Chigai, H. Yurimoto, A. Kouchi

    ASTROPHYSICAL JOURNAL   837 ( 1 )   35 (11pp)   2017年3月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.3847/1538-4357/aa5ca6

  • Nanomorphology of Itokawa regolith particles: Application to space-weathering processes affecting the Itokawa asteroid 査読

    Toru Matsumoto, Akira Tsuchiyama, Kentaro Uesugi, Tsukasa Nakano, Masayuki Uesugi, Junya Matsuno, Takashi Nagano, Akira Shimada, Akihisa Takeuchi, Yoshio Suzuki, Tomoki Nakamura, Michihiko Nakamura, Arnold Gucsik, Keita Nagaki, Tatsuhiro Sakaiya, Tadashi Kondo

    GEOCHIMICA ET COSMOCHIMICA ACTA   187   195 - 217   2016年8月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.gca.2016.05.011

  • TEMによる三次元観察から探るGEMSの起源 招待 査読

    松野 淳也, 土'山 明, 三宅 亮, 中村 圭子, Scott MESSENGER

    日本惑星科学会誌遊星人   24 ( 2 )   86 - 91   2015年6月

    　詳細を見る

    記述言語：日本語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.14909/yuseijin.24.2_86

  • Chemical and mineralogical compositions of two grains recovered from asteroid Itokawa

    M. Ebihara, N. Shirai, S. Sekimoto, T. Nakamura, A. Tsuchiyama, J. Matsuno, T. Matsumoto, M. Tanaka, M. Abe, A. Fujimura, Y. Ishibashi, Y. Karouji, T. Mukai, T. Okada, M. Uesugi, T. Yada

    Meteoritics & Planetary Science   50 ( 2 )   243 - 254   2015年2月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1111/maps.12418

  • Sample preparation toward seamless 3D imaging technique from micrometer to nanometer scale

    Akira Miyake, Junya Matsuno, Shoichi Toh

    Microscopy   63 ( suppl 1 )   i24 - i25   2014年10月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1093/jmicro/dfu055

  • REDUCTION EXPERIMENT OF FeO-BEARING AMORPHOUS SILICATE: APPLICATION TO ORIGIN OF METALLIC IRON IN GEMS

    Matsuno Junya, Tsuchiyama Akira, Miyake Akira, Noguchi Ryo, Ichikawa Satoshi

    The Astrophysical Journal   792 ( 2 )   136 - 136   2014年8月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    REDUCTION EXPERIMENT OF FeO-BEARING AMORPHOUS SILICATE: APPLICATION TO ORIGIN OF METALLIC IRON IN GEMS

    DOI： 10.1088/0004-637x/792/2/136

  • Sylvite and halite on particles recovered from 25143 Itokawa: A preliminary report 査読

    T. Noguchi, M. Kimura, T. Hashimoto, M. Konno, T. Nakamura, M. E. Zolensky, A. Tsuchiyama, T. Matsumoto, J. Matsuno, R. Okazaki, M. Uesugi, Y. Karouji, T. Yada, Y. Ishibashi, K. Shirai, M. Abe, T. Okada

    Meteoritics and Planetary Science   49 ( 7 )   1305 - 1314   2014年7月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1111/maps.12333

  • Investigation of cutting methods for small samples of Hayabusa and future sample return missions 査読

    Masayuki Uesugi, Ryo Noguchi, Tooru Matsumoto, Junya Matsuno, Takashi Nagano, Akira Tsuchiyama, Shigenori Harada, Kaori Yokoyama, Yoshiaki Yodo, Noboru Takeda, Toru Yada, Shogo Yakame, Yuzuru Karouji, Yukihiro Ishibashi, Masanao Abe, Tatsuaki Okada, Akio Fujimura, Mitsuru Ebihara, Fumio Kitajima, Keisuke Nagao, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Hisayoshi Yurimoto

    Meteoritics and Planetary Science   49 ( 7 )   1186 - 1201   2014年7月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1111/maps.12322

  • Space weathered rims found on the surfaces of the Itokawa dust particles 査読

    Takaaki Noguchi, Makoto Kimura, Takahito Hashimoto, Mitsuru Konno, Tomoki Nakamura, Michael E. Zolensky, Ryuji Okazaki, Masahiko Tanaka, Akira Tsuchiyama, Aiko Nakato, Toshinori Ogami, Hatsumi Ishida, Ryosuke Sagae, Shinichi Tsujimoto, Toru Matsumoto, Junya Matsuno, Akio Fujimura, Masanao Abe, Toru Yada, Toshifumi Mukai, Munetaka Ueno, Tatsuaki Okada, Kei Shirai, Yukihiro Ishibashi

    METEORITICS & PLANETARY SCIENCE   49 ( 2 )   188 - 214   2014年2月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1111/maps.12111

  • Three-dimensional microstructure of samples recovered from asteroid 25143 Itokawa: Comparison with LL5 and LL6 chondrite particles 査読

    Akira Tsuchiyama, Masayuki Uesugi, Kentaro Uesugi, Tsukasa Nakano, Ryo Noguchi, Toru Matsumoto, Junya Matsuno, Takashi Nagano, Yuta Imai, Akira Shimada, Akihisa Takeuchi, Yoshio Suzuki, Tomoki Nakamura, Takaaki Noguchi, Masanao Abe, Toru Yada, Akio Fujimura

    METEORITICS & PLANETARY SCIENCE   49 ( 2 )   172 - 187   2014年2月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1111/maps.12177

  • Analytical dual-energy microtomography: A new method for obtaining three-dimensional mineral phase images and its application to Hayabusa samples 査読

    A. Tsuchiyama, T. Nakano, K. Uesugi, M. Uesugi, A. Takeuchi, Y. Suzuki, R. Noguchi, T. Matsumoto, J. Matsuno, T. Nagano, Y. Imai, T. Nakamura, T. Ogami, T. Noguchi, M. Abe, T. Yada, A. Fujimura

    Geochimica et Cosmochimica Acta   116   5 - 16   2013年9月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1016/j.gca.2012.11.036

  • CRYSTALLIZATION EXPERIMENTS OF SiO2-RICH AMORPHOUS SILICATE: APPLICATION TO SiO2-RICH CIRCUMSTELLAR DUST AND GEMS

    Junya Matsuno, Akira Tsuchiyama, Chiyoe Koike, Hiroki Chihara, Shugo Ohi, Yuta Imai, Ryo Noguchi

    The Astrophysical Journal   753 ( 2 )   141 - 141   2012年7月

    　詳細を見る

    記述言語：その他   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1088/0004-637x/753/2/141

  • Three-dimensional structure of hayabusa samples: Origin and evolution of itokawa regolith 査読 国際誌

    Akira Tsuchiyama, Masayuki Uesugi, Takashi Matsushima, Tatsuhiro Michikami, Toshihiko Kadono, Tomoki Nakamura, Kentaro Uesugi, Tsukasa Nakano, Scott A. Sandford, Ryo Noguchi, Toru Matsumoto, Junya Matsuno, Takashi Nagano, Yuta Imai, Akihisa Takeuchi, Yoshio Suzuki, Toshihiro Ogami, Jun Katagiri, Mitsuru Ebihara, Trevor R. Ireland, Fumio Kitajima, Keisuke Nagao, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Hisayoshi Yurimoto, Michael E. Zolensky, Toshifumi Mukai, Masanao Abe, Toru Yada, Akio Fujimura, Makoto Yoshikawa, Junichiro Kawaguchi

    Science   333 ( 6046 )   1125 - 1128   2011年8月

    　詳細を見る

    記述言語：英語   掲載種別：研究論文（学術雑誌）  

    DOI： 10.1126/science.1207807

▼全件表示

講演・口頭発表等

  • CTデータを眺める：3Dプリンタ・ホログラフィ・バーチャルリアリティ 招待

    松野淳也

    鉱物科学若手の会  2018年9月 

    　詳細を見る

    開催年月日： 2018年9月

    記述言語：日本語   会議種別：口頭発表（一般）  

    開催地：山形市   国名：日本国  

  • ナノCT が拓く宇宙物質科学 －小惑星探査機はやぶさの試料分析を例に－ 招待

    松野淳也

    日本放射線技術学会近畿支部第59回学術大会  2015年11月 

    　詳細を見る

    開催年月日： 2015年11月

    記述言語：日本語   会議種別：口頭発表（一般）  

    開催地：京都市   国名：日本国  

MISC

所属学協会

  • 日本鉱物科学会

  • 日本惑星科学会

その他

  • Accepted proposals of the Ryugu Sample 2nd AO

    2024年4月

    　詳細を見る

    人類初のC型小惑星の帰還粒子である「リュウグウ試料」の第二回国際分析研究へ応募し、粒子が配分された。
    https://curation.isas.jaxa.jp/RyuguAO2/

共同研究・競争的資金等の研究課題

  • コンドリュール―GEMS同時再現実験

    2022年4月 - 2025年3月

    　 詳細を見る

    担当区分：研究代表者 

    科研費「若手研究」
    https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-22K14088/

  • コンドリュール―GEMS同時再現実験

    研究課題/領域番号：22K14088  2022年 - 2024年

    日本学術振興会  科学研究費助成事業  若手研究

    　 詳細を見る

    担当区分：研究代表者  資金種別：科研費

  • はやぶさ２試料の有機包有物の三次元形状分析

    2021年

    立命館大学：研究推進プログラム（科研費獲得推進型）

    　 詳細を見る

    担当区分：研究代表者  資金種別：学内資金・基金等

  • 彗星塵に含まれる微粒子ＧＥＭＳの再現実験からみる初期太陽系物質の起源

    研究課題/領域番号：13J01031  2013年 - 2014年

    日本学術振興会  科学研究費助成事業  若手研究

    　 詳細を見る

    担当区分：研究代表者  資金種別：科研費

教育活動概要

  • 非常勤講師して、これまでに2大学にて、惑星科学に関する講義を担当した。
    本学では、「化学工学実験第一」、「化学工学実験第二」を担当（分担）。

担当授業科目

  • 化学工学実験第二

    2024年4月 - 2024年9月   前期

他大学・他機関等の客員・兼任・非常勤講師等

  • 2022年  園田女子大学  区分:非常勤講師  国内外の区分:国内 

    学期、曜日時限または期間：前期

  • 2022年  大谷大学  区分:非常勤講師  国内外の区分:国内 

    学期、曜日時限または期間：前期

  • 2021年  園田女子大学  区分:非常勤講師  国内外の区分:国内 

    学期、曜日時限または期間：前期

社会貢献活動

  • 大地は語る2013　－地質の日記念企画展－

    京都大学理学部地質学鉱物学教室・総合博物館  京都大学総合博物館  2013年5月

    　詳細を見る

    対象： 社会人・一般,　学術団体,　企業,　市民団体,　行政機関

    種別：講演会