Raw materials of the Earth: An experimental study on the chondrule-gas reaction

• Project/Area Number: 21K03652
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: National Institute of Polar Research
• Principal Investigator: 今栄 直也 国立極地研究所, 先端研究推進系, 助教 (60271037)
• Co-Investigator(Kenkyū-buntansha): 堀江 憲路 国立極地研究所, 先端研究推進系, 助教 (00571093)
• Project Period (FY): 2021-04-01 – 2026-03-31
• Project Status: Granted (Fiscal Year 2023)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2025: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2024: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
• Keywords: 石英ガラス管真空封入実験 / 珪酸塩鉱物の硫化 / エンスタタイトコンドライト / ニニンジェライト / オルダマイト / コンドリュール / 初期地球 / 地球組成 / 再現実験 / 硫化反応

Outline of Research at the Start

Eコンドライトの地球の原材料物質との関連性が高まっている。地球の化学組成を明らかにするには、Eコンドライトの形成過程の理解が不可欠である。このためには、再現実験が鍵となる。Eコンドライト中のコンドリュールの主な構成鉱物は輝石で、強還元的な鉱物を含む。この輝石コンドリュールはSiOガスの下で形成することを研究代表者は実験的に示した。これによりSi同位体比の変化が予測できる。この隕石のMg/Si原子比は太陽系元素存在度の値より小さい。強還元下で輝石の硫化反応が進行し、Mg/Si比が低下した。本課題は太陽系形成期における輝石コンドリュールのSi同位体変動と輝石の硫化メカニズムを実験的に探る。

Outline of Annual Research Achievements

エンスタタイトコンドライトには、ニニンジェライトやオルダマイトなど還元性の高い鉱物が多産する。これらは極めて低い酸素圧で高い硫黄圧の下、Mg珪酸塩の硫化反応により形成した。FleetとMacRae(1987)による先駆的実験を参考に、出発物質としてマグネシウムに富むかんらん石(サンカルロスオリビン)の単結晶を、硫黄ガス源および硫黄分圧バッファーとして、ピロータイトの単結晶を準備し、これらを各々グラファイト容器に入れて、一つの石英ガラス管に真空封入した。これを1200Cで79時間と1280Cで72時間の加熱を行った。石英管周囲を還元的にするためにアルゴンガスを流した。出発物質のサンカルロスオリビンを取り囲んでニニンジェライトとシリカが形成した。またサンカルロスオリビンと生成物（ニニンジェライトとシリカ）との境界にはエンスタタイトの薄層が2次的に形成した。エンスタタイトおよびディオプサイドの各単結晶でも実施した。また、ピロータイトの代わりにトロイライトの単結晶でも行った。トロイライトでは、1340Cと1430Cで実施した。ピロータイトを用いた時より高い反応温度を必要とするため、高温での石英管の破損を防ぐ二重真空封入法を導入した。さらにMg珪酸塩を炭素質コンドライトに変え、トロイライトをバッファーとして二重真空封入法にて、1430Cで100C/hでコンドリュール合成を行った。この中にニニンジェライトとオルダマイトを確認できた。また、この形成したコンドリュール形状組織は、エンスタタイトコンドライトのタイプIB型のコンドリュールと一致した。これは石英管内でシリカに富むガスが生成するためである。これによりエンスタタイトコンドライトのタイプIB型のコンドリュール形成過程を実験的に再現できることがわかった。実験結果の一部は、極域科学シンポジウムで英語による口頭発表を行った。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

リュウグウ試料分析と論文化を当年度６月頃に終えたために、本格的に当申請課題を開始することができた。

Strategy for Future Research Activity

一連の実験結果は次年度に地球惑星関連学会で口頭発表予定である。また英語による論文化を進める。エンスタタイトコンドライトにはニニンジェライトやオルダマイト以外にも還元性の高い鉱物が多種存在する。シュライバーサイトやペリアイトといった燐化鉄ニッケル合金の再現やカマサイト中の高いケイ素やクロム含有量の再現、などが対象になる。酸素分圧と硫黄分圧を制御して、さらに還元的な環境も実験的に上記の特異な鉱物の再現を試みる。

Research Products

• [Journal Article] A curation for uncontaminated Hayabusa2-returned samples in the extraterrestrial curation center of JAXA: from the beginning to present day (2023)
  • Author(s): Yada Toru、Abe Masanao、Nishimura Masahiro、...、Tachibana Shogo、Usui Tomohiro
  • Journal Title: Earth, Planets and Space Volume: 75 Issue: 1 Pages: 170-170
  • DOI: 10.1186/s40623-023-01924-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu (2023)
  • Author(s): Tomioka Naotaka、Yamaguchi Akira、Ito Motoo、Uesugi Masayuki、Imae Naoya、Shirai Naoki、Ohigashi Takuji、Kimura Makoto、Liu Ming-Chang、Greenwood Richard C., et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 6 Pages: 669-677
  • DOI: 10.1038/s41550-023-01947-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Insight into multi-step geological evolution of C-type asteroids from Ryugu particles (2023)
  • Author(s): Yamaguchi A., Tomioka N., Ito M., Shirai N., Kimura M., Greenwood R. C. et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 4 Pages: 398-405
  • DOI: 10.1038/s41550-023-01925-x
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Early fluid activity on Ryugu inferred by isotopic analyses of carbonates and magnetite (2023)
  • Author(s): McCain Kaitlyn A.、Matsuda Nozomi、Liu Ming-Chang、McKeegan Kevin D.、Yamaguchi Akira、Kimura Makoto、Tomioka Naotaka、Ito Motoo、Imae Naoya、Uesugi Masayuki、Shirai Naoki、Ohigashi Takuji、Greenwood Richard C., et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 3 Pages: 309-317
  • DOI: 10.1038/s41550-022-01863-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Oxygen isotope evidence from Ryugu samples for early water delivery to Earth by CI chondrites (2022)
  • Author(s): Greenwood Richard C.、Franchi Ian A.、Findlay Ross、Malley James A.、Ito Motoo、Yamaguchi Akira、Kimura Makoto、Tomioka Naotaka、Uesugi Masayuki、Imae Naoya、Shirai Naoki、Ohigashi Takuji, et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 1 Pages: 29-38
  • DOI: 10.1038/s41550-022-01824-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Antarctic micrometeorite composed of CP and CS IDP‐like material: A micro‐breccia originated from a partially ice‐melted comet‐like small body (2022)
  • Author(s): Noguchi Takaaki、Matsumoto Rikako、Yabuta Hikaru、Kobayashi Hanae、Miyake Akira、Naraoka Hiroshi、Okazaki Ryuji、Imae Naoya、Yamaguchi Akira、Kilcoyne A. L. David、Takeichi Yasuo、Takahashi Yoshio
  • Journal Title: Meteoritics & Planetary Science Volume: 57 Issue: 11 Pages: 2042-2062
  • DOI: 10.1111/maps.13919
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu (2022)
  • Author(s): Liu Ming-Chang、McCain Kaitlyn A.、Matsuda Nozomi、Yamaguchi Akira、Kimura Makoto、Tomioka Naotaka、Ito Motoo、Uesugi Masayuki、Imae Naoya、Shirai Naoki、Ohigashi Takuji、Greenwood Richard C., et al.
  • Journal Title: Nature Astronomy Volume: 6 Issue: 10 Pages: 1172-1177
  • DOI: 10.1038/s41550-022-01762-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A pristine record of outer Solar System materials from asteroid Ryugu’s returned sample (2022)
  • Author(s): Ito M.Tomioka N.Uesugi M.Yamaguchi A.Shirai N.Ohigashi T.Liu M.-C.Greenwood R. C.Kimura et al.
  • Journal Title: Nature Astronomy Volume: 6 Issue: 10 Pages: 1163-1171
  • DOI: 10.1038/s41550-022-01745-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth (2022)
  • Author(s): Tachibana S.、Abe M. et al.
  • Journal Title: Science Volume: 375 Issue: 6584 Pages: 1011-1016
  • DOI: 10.1126/science.abj8624
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A unique and pristine record of outer Solar System materials from C-type asteroid Ryugu (2022)
  • Author(s): Motoo Ito, Naotaka Tomioka, Masayuki Uesugi, Akira Yamaguchi,, Naoki Shirai, Takuji Ohigashi, Ming-Chang Liu, Richard C. Greenwood, Makoto Kimura, Naoya Imae, et al.
  • Journal Title: Nature Astronomy Volume: -
  • Peer Reviewed
• [Presentation] CHRISTIANSEN FEATURE AND RESTSTRAHLEN FEATURE OF ROCKY SAMPLES FOR FUTURE THERMAL INFRARED EXPLORATION (2024)
  • Author(s): S. Furukawa , T. Okada , Z.-L. Li , Y. Shimaki , N. Sakatani , H. Senshu , T. Sekiguchi , H. Demura , T. Arai , T. Kouyama , M. Kanamaru , T. Ishizaki , S. Tanaka , A. Yamaguchi , N. Imae , T. Ojima , R. Kanemaru
  • Organizer: 55th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] シリカに富む多孔質南極微隕石：未知のタイプの太陽系外縁天体起源ダストか？ (2023)
  • Author(s): 野口 高明、松本 里佳子、山口 亮、今栄 直也
  • Organizer: JpGU
• [Presentation] Mild shock metamorphism experienced by surface particles of asteroid Ryugu (2023)
  • Author(s): Naotaka Tomioka, Akira Yamaguchi, Motoo Ito, Masayuki Uesugi, Naoya Imae, et al.
  • Organizer: JpGU
• [Presentation] LABORATORY ALTERATION EXPERIMENTS OF THE UNCONTAMINATED RYUGU PARTICLES (2023)
  • Author(s): N. Imae, N. Tomioka, M. Uesugi, A. Yamaguchi, M. Ito, M. Kimura, R. C. Greenwood, T. Kawai, N. Shirai, T. Ohigashi, M.-C. Liu, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada, M. Abe, and T. Usui
  • Organizer: MetSoc
  • Int'l Joint Research
• [Presentation] COMPARISON BETWEEN CARBON AND NITROGEN IN SURFACE AND SUB-SURFACE MATERIALS FROM ASTEROID (162173) RYUGU (2023)
  • Author(s): Monica. M. Grady , A. B. Verchovsky , R. C. Greenwood , F. A. J. Abernethy , I. A. Franchi , M. Suttle , M. Ito , N. Tomioka , M. Uesugi , A. Yamaguchi , M. Kimura , N. Imae , N. Shirai , T. Ohigashi , J.-P. Bibring, D. Loizeau, C. Pilorge , M-C. Liu , T. Yada , M. Abe , T. Usui
  • Organizer: MetSoc
  • Int'l Joint Research
• [Presentation] QUANTITATIVE EVOLVED GAS ANALYSIS OF RYUGU SAMPLES IN COMPARISON WITH CI METEORITES (2023)
  • Author(s): A. B. Verchovsky , F. A. J. Abernethy , M. Anand , I. A. Franchi , M. M. Grady , R. C. Greenwood , S. J. Barber , M. Suttle , M. Ito , N. Tomioka , M. Uesugi , A. Yamaguchi , M. Kimura , N. Imae , N. Shirai , T. Ohigashi , M-C. Liu , T. Yada , M. Abe , T. Usui
  • Organizer: MetSoc
  • Int'l Joint Research
• [Presentation] EXTREMELY HIGH Xe CONCENTRATION IN THE HAYABUSA2 C0209 SAMPLE (2023)
  • Author(s): A. B.Verchovsky , F. A. J. Abernethy , M. Anand , I. A. Franchi , M. M. Grady , R. C. Greenwood , S. J. Barber , M. Suttle , M. Ito , N. Tomioka , M. Uesugi , A. Yamaguchi , M. Kimura , N. Imae , N. Shirai , T. Ohigashi , M-C. Liu , T. Yada , M. Abe , T. Usui
  • Organizer: MetSoc
  • Int'l Joint Research
• [Presentation] TIR MULTI-BAND SPECTROSCOPY OF METEORITES AND ROCKS FOR ASTEROID MISSIONS (2023)
  • Author(s): T. Okada , Z.-L. Li , S. Furukawa , Y. Shimaki , N. Sakatani , H. Senshu , T. Sekiguchi , H. Demura , T. Arai , T. Kouyama , M. Kanamaru , T. Ishizaki , S. Tanaka , A. Yamaguchi , N. Imae
  • Organizer: MetSoc
  • Int'l Joint Research
• [Presentation] メラノフロジャイト仮晶を含む多孔質な南極微隕石：氷衛星地下海からの放出物か，未知の太陽系外縁天体の物質か？ (2023)
  • Author(s): 野口高明 , 光成拓也 , 松本里佳子 , 山口亮 , 今栄直也 , 松本徹 , 荒木暢 , 湯澤勇人 , 三宅亮
  • Organizer: 日本鉱物科学会
• [Presentation] An experimental study on the formation of niningerite and oldhamite: Implication for the chondrule formation of the EH3 chondrite (2023)
  • Author(s): N. Imae
  • Organizer: The 14th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Thermal infrared spectroscopic features of meteorites, rocks, and minerals for the application to future planetary missions (2023)
  • Author(s): S. Furukawa , T. Okada , Z. LI , Y. Shimaki , N. Sakatani , H. Senshu , T. Sekiguchi , H. Demura , T. Arai , T. Kouyama , M. Kanamaru , T. Ishizaki , S. Tanaka , A. Yamaguchi , N. Imae
  • Organizer: The 14th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] 小惑星リュウグウ表層粒子の衝撃変成 (2022)
  • Author(s): 富岡尚敬, 山口亮, 伊藤元雄, 上椙真之, 今栄直也, 白井直樹, 大東琢治, 木村眞, 他
  • Organizer: 日本鉱物科学会年会
• [Presentation] CP IDPとCS IDP類似物の微細な角礫岩である南極微隕石 (2022)
  • Author(s): 野口高明, 松本理佳子, 薮田ひかる, 小林華栄, 三宅亮, 奈良岡浩, 岡崎隆司, 今栄直也, 山口亮, キルコイン・デービッド, 武市康男, 高橋嘉夫
  • Organizer: 日本鉱物科学会年会
• [Presentation] EARLY FLUID ACTIVITY ON THE RYUGU PARENT ASTEROID INFERRED FROM 53MN-53CR AGES OF RYUGU CARBONATE (2022)
  • Author(s): K. A. McCain, N. Matsuda, M.-C. Liu, K. D. McKeegan, A. Yamaguchi, M. Kimura, N. Tomioka, M. Ito, N. Imae, M. Uesugi, N. Shirai, T. Ohigashi, R. C. Greenwood, K. Uesugi, et al.
  • Organizer: 85th Annual Meeting of The Meteoritical Society
• [Presentation] THE O-ISOTOPE COMPOSITION OF RYUGU PARTICLES: THE MOST PRISTINE CIs? (2022)
  • Author(s): R. C. Greenwood, I. A. Franchi, R. Findlay, J. A. Malley, M. Ito, A. Yamaguchi, M. Kimura, N. Tomioka, M. Uesugi, N. Imae, N. Shirai, T. Ohigashi, et al.
  • Organizer: 85th Annual Meeting of The Meteoritical Society
• [Presentation] Chemical characteristics of Ryugu particles returned by the Hayabusa2 spacecraft (2022)
  • Author(s): N. Shirai, M. Ito, N. Tomioka, M. Uesugi, A. Yamguchi, N. Imae, T. Ohigashi, et al.
  • Organizer: JpGU
• [Presentation] X-ray diffraction study of the Ryugu powder: Comparison with carbonaceous chondrites (2022)
  • Author(s): N. Imae, A. Yamaguchi, M. Kimura, N. Tomioka, M. Ito, M. Uesugi, N. Shirai, T. Ohigashi, et al.
  • Organizer: JpGU
• [Presentation] Hayabusa2 returned samples: Unique and pristine record of Solar System materials from asteroid Ryugu (2022)
  • Author(s): 伊藤 元雄, 富岡 尚敬, 上椙 真之, 山口 亮, 今栄 直也, 白井 直樹, 大東 琢治, 木村 眞,他
  • Organizer: JpGU
• [Presentation] Characterization of organic materials in Ryugu particles and investigation for their origin and nature (2022)
  • Author(s): Masayuki Uesugi, Hayato Yuzawa, Takuji Ohigashi, Motoo Ito, Naotaka Tomioka, Yu Kodama, Naoki Shirai, Kentaro Uesugi, Akira Yamaguchi, Naoya Imae, Makoto Kimura, et al.
  • Organizer: JpGU
• [Presentation] Origin of silica polymorphs in eucrites: Implications for the crystallization of eucritic magma and metamorphic history of Vestan crust (2022)
  • Author(s): Rei Kanemaru, Akira Yamaguchi, Naoya Imae, Aiko Nakato, Junko Isa, Hirotsugu Nishido
  • Organizer: The 13th Symposium on Polar Science
• [Presentation] An artificial laboratory alteration of the Ryugu samples: Comparison with the Orgueil CI chondrite and implication to the long durational sample storage (2022)
  • Author(s): Naoya Imae, Naotaka Tomioka, Motoo Ito, Akira Yamaguchi, Makoto Kimura, Masayuki Uesugi, Naoki Shirai, Takuji Ohigashi, et al.
  • Organizer: The 13th Symposium on Polar Science
• [Presentation] The relationship between Ryugu samples and CY and CI chondrites: Another twist in the tale (2022)
  • Author(s): Richard Greenwood, I.A Franchi, R. Findlay, J. A. Malley, M. Ito, A. Yamaguchi, M. Kimura, N. Tomioka, M. Uesugi, N. Imae, N. Shirai, T. Ohigashi, et al.
  • Organizer: The 13th Symposium on Polar Science
• [Presentation] Na-rich phase in Ryugu particle: Evidence for metasomatic agent in the parent asteroid? (2022)
  • Author(s): Akira Yamaguchi, Naotaka Tomioka, Motoo Ito, Makoto Kimura, Naoki Shirai, Richard C. Greenwood, Ming-Chang Liu, Kaitlyn A. McCain, Nozomi Matsuda, Masayuki Uesugi, Naoya Imae, Takuji Ohigashi, et al.
  • Organizer: The 13th Symposium on Polar Science
• [Presentation] Ryugu’s volatiles investigated using stepped combustion and EGA methods (2022)
  • Author(s): A.B. Verchovsky, F. A. J. Abernethy, M. Anand, I. A. Franchi, M. M. Grady, R. C. Greenwood, M. Suttle, M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, M. Kimura, N. Imae, et al.
  • Organizer: Hayabusa2022
• [Presentation] P-rich compounds within the Ryugu sample collection: a perspective from joint MicrOmega/Curation, the OU and Phase2 Kochi curation activities (2022)
  • Author(s): Pilorget, C., Loizeau, D., Ito, M., Bibring, J.-P., Carter, J., Le Pivert-Jolivet, T., Riu, L., Brunetto, R., Tomioka, N., Uesugi, M., Yamaguchi, A., Imae, N., et al.
  • Organizer: Hayabusa2022
• [Presentation] Raman micro-spectroscopic study of carbonates on the surafce of Y-980115 (2022)
  • Author(s): Hiroharu Yui, Hayato Tsuchiya, Shu-hei Urashima, Keisuke Narahara, Aruto Kashima, Naoya Imae, Akira Yamaguchi
  • Organizer: The 13th Symposium on Polar Science
• [Presentation] 放射光CTで得られるリュウグウ試料の3次元構造 (2022)
  • Author(s): 上椙真之, 伊藤元雄, 松本恵, 土山明, 中村智樹, 平原佳織, 富岡尚敬, 上杉健太郎, 山口亮, 今栄直也, 白井直樹, 大東琢治, 他
  • Organizer: 日本惑星科学会秋季講演会
• [Presentation] The oxygen isotopic composition of Hayabusa2 particles: testing the relationship with CI and CY chondrites (2022)
  • Author(s): R. C. Greenwood, R. Findlay, I. A. Franchi, J. A. Malley, M. Ito, A. Yamaguchi, M. Kimura, N. Tomioka, M. Uesugi, N. Imae, N. Shirai, T. Ohigashi, M-C. Liu, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, A. Tsuchiyama, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada, M. Abe
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Hayabusa2 returned samples: Unique and pristine record of solar system materials from asteroid Ryugu (2022)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, N. et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Oxygen isotopes of carbonate and magnetite record fluid evolution on the Ryugu asteroid (2022)
  • Author(s): McCain, N. Matsuda, K.D. McKeegan, M-C. Liu, A. Yamaguchi, M. Kimura, N. Tomioka, M. Ito, M. Uesugi, N. Imae, N. et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Petrology of asteroid Ryugu particles allocated to the Phase2 curation Kochi team (2022)
  • Author(s): A. Yamaguchi,, M. Kimura, M. Ito, N. Tomioka, M. Uesugi, N. Imae, et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Transmission electron microscopy of the asteroid Ryugu particles allocated to the Phase2 curation Kochi team (2022)
  • Author(s): N. Tomioka, M. Ito, M. Uesugi, A. Yamaguchi, N. Imae, et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] In-situ oxygen isotope study of anhydrous minearals in a Ryugu particle: Implications for the precursors to CI-chondrite parent bodies (2022)
  • Author(s): M.-C. Liu, K. A. McCain, N. Matsuda, Yamaguchi, M. Kimura, N. Tomioka, M. Ito, M. Uesugi, N. Imae, et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Characterizing the Ryugu samples using the laboratory-based XRD and the meteorite collections at NIPR (2021)
  • Author(s): N. Imae, A. Yamaguchi, M. Kimura, M. Ito, N. Tomioka, M. Uesugi, N. Shirai, T. Ohigashi, M-C. Liu, R.C. Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama,, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada and M. Abe
  • Organizer: 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Multiscale characterization of the Asuka 12 meteorite; rehearsal of Hayabusa2 returned sample analysis – (2021)
  • Author(s): M. Uesugi, M. Ito, N. Tomioka, N. Imae, A. Yamaguchi, M. Kimura, N. Shirai, T. Ohigashi, M-C. Liu,R.C Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama,, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada and M. Abe
  • Organizer: 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] Thermal and shock history of diogenites based on the occurrence of silica minerals (2021)
  • Author(s): Rei Kanemaru, Akira Yamaguchi, Naoya Imae, and Atsushi Takenouchi
  • Organizer: 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] An attempt for estimating aqueous alteration environment from Raman spectra of iron sulfide (2021)
  • Author(s): Keisuke Narahara, Shu-hei Urashima, Akira Yamaguchi, Naoya Imae, and Hiroharu Yui
  • Organizer: 12th Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] The C-type asteroid Ryugu: A first detailed look by Phase2 Curation Kochi (Ph2K) (2021)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, et al.
  • Organizer: HAYABUSA2021
  • Int'l Joint Research / Invited
• [Presentation] シリカ鉱物の産状に基づくダイオジェナイトの熱・衝撃史 (2021)
  • Author(s): 金丸 礼, 山口 亮, 今栄 直也, 竹之内 惇志
  • Organizer: 日本鉱物科学会