Development of new geothermometer and cooling speed-meter for extraterrestrial materials based upon phase transitions of silica minerals
Project/Area Number |
21K18645
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 17:Earth and planetary science and related fields
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Research Institution | The University of Tokyo |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
杉山 和正 東北大学, 金属材料研究所, 教授 (40196762)
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Project Period (FY) |
2021-07-09 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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Keywords | シリカ鉱物 / 相転移 / トリディマイト / 加熱冷却実験 / 冷却速度 / 地質温度計・冷却速度計 / 地球外物質 / 加熱・冷却実験 |
Outline of Research at the Start |
シリカ鉱物は地球外物質では微小な副成分鉱物でしか存在しないためほとんど注目されていないが、多くの多形を持ち、冷却過程の違いにより多形間での相転移挙動が異なるため有用な熱履歴情報を持つ。そこで本研究では、シリカ鉱物の加熱・冷却実験を通して広い温度範囲(1200度~室温)でのシリカ鉱物の冷却速度と相転移関係を明らかにすることを試み、地球外物質の熱履歴解明に有効な新しい地質温度・冷却速度計の構築に挑戦する。これを用いて様々な地球外試料中シリカ鉱物の相同定からこれまで未知だった熱履歴の検証を行う。
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Outline of Final Research Achievements |
We have analyzed silica minerals in diverse extraterrestrial materials. Among them, we especially analyzed lunar meteorites in particular. As with Martian meteorites, many silica phases were amorphous, suggesting that they were affected by strong shock metamorphism. In fact, many of the samples we analyzed were brecciated, further indicating the strong influence of shock metamorphism. Heating and cooling experiments using an electric furnace are continuing under various conditions, and it will take some more time to obtain comprehensive results. The results of X-ray diffraction experiments on tridymite in both terrestrial and extraterrestrial samples did not reveal any differences between "terrestrial" and "meteoritic" types, as has been suggested, but suggested that it may be only a matter of differences in crystallinity.
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Academic Significance and Societal Importance of the Research Achievements |
これまでに地球外物質中ではあまり注目を集めることの無かったシリカ鉱物であるが、多様な多形が存在し、重要な熱履歴・衝撃履歴の情報を含んでいることが示唆されることが、本研究を通じてあらためて示された。特にトリディマイトにおいては、複雑な多形、ポリタイプ、双晶組織を示すことからX線回折データの解釈が容易ではないが、地球型・隕石型とこれまでは区別して分けられていたものが、必ずしもそのような必要が無い可能性があることが分かって来た。
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Report
(3 results)
Research Products
(110 results)
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[Journal Article] Ryugu particles found outside the Hayabusa2 sample container2022
Author(s)
Nakato Aiko、Inada Shiori、Furuya Shizuho、Nishimura Masahiro、Yada Toru、Abe Masanao、Usui Tomohiro、Yoshida Hideto、Mikouchi Takashi、Sakamoto Kanako、Yano Hajime、Miura Yayoi N.、Takano Yoshinori、Yamanouchi Shinji、Okazaki Ryuji、Sawada Hirotaka、Tachibana Shogo
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Journal Title
GEOCHEMICAL JOURNAL
Volume: 56
Issue: 6
Pages: 197-222
DOI
ISSN
0016-7002, 1880-5973
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Crystal structure, XANES and charge distribution investigation of krennerite and sylvanite: analysis of Au-Te and Te-Te bonds in Au1-xAgxTe2 group minerals2022
Author(s)
Ginga Kitahara, Akira Yoshiasa, Makoto Tokuda, Massimo Nespolo, Hidetomo Hongu, Koichi Momma, Ritsuro Miyawaki, Kazumasa Sugiyama
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Journal Title
Acta crystallographica Section B, Structural science, crystal engineering and materials
Volume: 78
Pages: 117-132
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Olivine mineralogy of asteroid Ryugu samples and CI chondrites: Further evidence for their common origin2022
Author(s)
Mikouchi T., Yoshida H., Nakamura T., Zolensky M. E., Nakashima D., Hagiya K., Kikuiri M., Morita T., Amano K., Kagawa E., Yurimoto H., Noguchi T., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Watanabe S. and Tsuda Y.
Organizer
84th Annual Meeting of the Meteoritical Society
Related Report
Int'l Joint Research
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[Presentation] Shock-induced deformation recorded in the regolith particles from C-type asteroid Ryugu2022
Author(s)
Kikuiri M., Nakamura T., Langenhorst F., Pollok K., Mikouchi T., Yoshida H., Nakashima D. Zolensky M. E., Uesugi M., Yurimoto H., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Watanabe S. and Tsuda Y.
Organizer
84th Annual Meeting of the Meteoritical Society
Related Report
Int'l Joint Research
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[Presentation] Ryugu particles found outside the Hayabusa2 Sample Container2022
Author(s)
Inada S., Nakato A., Furuya S., Nishimura M., Yada T., Abe M., Usui T., Yoshida H., Mikouchi T., Sakamoto K., Okazaki R., Sawada H. and Tachibana S.
Organizer
84th Annual Meeting of the Meteoritical Society
Related Report
Int'l Joint Research
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[Presentation] Lithological variation of asteroid Ryugu samples returned by the Hayabusa2 spacecraftAssessment from the 18 particles distributed to the initial analysis “Stone” team2022
Author(s)
Mikouchi T., Yoshida H., Nakamura T., Matsumoto M., Tsuchiyama A., Matsuno J., Tustsui K., Zolensky M. E., Nakashima D., Hagiya K., Kikuiri M., Morita T., Amano K., Kagawa E., Yurimoto H., Noguchi T., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Watanabe S. and Tsuda Y.
Organizer
Hayabusa Symposium 2022
Related Report
Int'l Joint Research
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[Presentation] Evidence of Permafrost Processes in C-asteroid Regoliths2022
Author(s)
Zolensky M., Nakamura T., Mikouchi T., Yurimoto H., Noguchi T., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Watanabe S. and Tsuda Y.
Organizer
Hayabusa Symposium 2022
Related Report
Int'l Joint Research
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[Presentation] High-pressure Synthesis, Crystal Structure, and Properties of High-entropy Chalcogenides with NiAs-type and Pyrite-type Structure2022
Author(s)
A. Yamamoto, A. Zakiyatul, R. Furui, H. Yokoyama, D. Murata, S. Kumegai, K. Sugiyama, N. Dragoe, M. Fronzi
Organizer
10th Asia Conf. High-Pressure Research(ACHPR-10)
Related Report
Int'l Joint Research / Invited
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[Presentation] Olivine Compositional Variation of Asteroid Ryugu Samples: Possible Precursors of Ryugu's Parent Asteroid2022
Author(s)
Mikouchi T., Nakamura T., Zolensky M. E., Yoshida H., Nakashima D., Hagiya K., Kikuiri M., Morita T., Amano K., Kagawa E., Yurimoto H., Noguchi T., Okazaki R., Yabuta H., Naraoka H., Sakamoto K., Tachibana S., Watanabe S. and Tsuda Y.
Organizer
53rd Lunar and Planetary Science Conference
Related Report
Int'l Joint Research
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[Presentation] Shock Recovery of Macro Blocks of Rocky Materials with Decaying Shock Waves2021
Author(s)
Kurosawa K., Ono H., Niihara T., Mikouchi T., Sakaiya T., Kondo T., Tomioka N., Genda H., Tada T., Tada R., Kayama M., Koike M., Sano Y., Matsuzaki T., Murayama M., Satake W., Okamoto T. and Matsui T.
Organizer
84th Annual Meeting of the Meteoritical Society
Related Report
Int'l Joint Research
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[Presentation] Shock recovery of rocks with a variety of shock-induced pressure at a single shot2021
Author(s)
Ono H., Kurosawa K., Niihara T., Mikouchi T., Genda H., Tomioka N., Sakaiya T., Koundo T., Kayama M., Koike M., Sano Y., Satake W. and Matsui T.
Organizer
Europlanet Sci. Congress 2021
Related Report
Int'l Joint Research
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[Presentation] Sr置換によるLa3Ta0.5Ga5.5O14結晶の熱物性制御2021
Author(s)
武田博明, 蕎麦田雄大, 臼井晴紀, 徳田誠, 杉山和正, 小玉翔平, 柳瀬郁夫, 保科拓也, 鶴見敬章, VILLORA Encarnacion G., 島村清史
Organizer
結晶成長国内会議
Related Report
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[Presentation] 高圧下での単結晶及び粉末中性子回折による氷VII相の精密構造解析2021
Author(s)
山下恵史朗, 小松一生, KLOTZ Stefan, FABERO Oscar, FERNANDEZ-DIAZ Maria T., 阿部淳, 町田真一, 服部高典, 入舩徹男, 新名亨, 杉山和正, 川又透, 鍵裕之
Organizer
分子科学討論会
Related Report
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