A study on isotopic homogenization processes in the early solar system

• Project/Area Number: 26400524
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geochemistry/Cosmochemistry
• Research Institution: The University of Tokyo
• Principal Investigator: Hiyagon Hajime 東京大学, 大学院理学系研究科(理学部), 准教授 (70192292)
• Co-Investigator(Kenkyū-buntansha): 森下 祐一 静岡大学, 理学部, 教授 (90358185)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: SIMS / ICP-MS / CAI / コンドルール / マグネシウム同位体 / ベリリウム10 / 同位体不均一 / 初期太陽系 / NanoSIMS / CH/CBコンドライト / LLコンドライト / 二次イオン質量分析 / 誘導結合プラズマ質量分析 / ホウ素同位体 / 始原的隕石 / 二次イオン質量分析計 / シリコン同位体 / 質量依存同位体分別 / ヒボナイト / 難揮発性包有物 / FUN包有物 / 酸素同位体

Outline of Final Research Achievements

(1) Isotopic studies were conducted on so-called FUN inclusions from Murchison (CM2) and Allende (CV3) chondrites, and their origin and chemical compositions of their precursors were considered. (2) Isotopic analyses of Be-B systematics were conducted for CAIs from CH/CB chondrites using NanoSIMS, and the origin of 10Be was discussed. (3) A high precision Mg isotope analysis technique has been developed using ICP-MS and applied to chondrules from an LL 3.15 chondrite, and possible heterogeneity in the distribution of 26Al (26Al/27Al ratio) in the early solar system was considered.

Research Products

• [Journal Article] Origin of the eclogitic clasts with graphite-bearing and graphite-free lithologies in the Northwest Africa 801 (CR2) chondrite: Possible origin from a Moon-sized planetary body inferred from chemistry, oxygen isotopes and REE abundances (2016)
  • Author(s): H. Hiyagon, N. Sugiura, N.T. Kita, M. Kimura, Y. Morishita, Y. Takehana
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 186 Pages: 32-48
  • DOI: 10.1016/j.gca.2016.04.030
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A long duration of the 16O-rich reservoir in the solar nebula, as recorded in fine-grained refractory inclusions from the least metamorphosed carbonaceous chondrites. (2016)
  • Author(s): Ushikubo T., Tenner T. J., Hiyagon H. and Kita N. T.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 201 Pages: 103-122
  • DOI: 10.1016/j.gca.2016.08.032
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 二次イオン質量分析装置の原理 (2016)
  • Author(s): 比屋根肇
  • Journal Title: ぶんせき（日本分析化学会誌） Volume: 9 Pages: 352-357
  • Peer Reviewed
• [Journal Article] Comprehensive study of carbon and oxygen isotopic compositions, trace element abundances, and cathodoluminescence intensities in calcite in the Murchison CM2 chondrite. (2015)
  • Author(s): Fujiya W., Sugiura N., Marrocchi T., Takahata N., Hoppe P., Shirai K., Sano Y. and Hiyagon H.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 161 Pages: 101-117
  • Peer Reviewed / Int'l Joint Research
• [Presentation] IC-ICPMSを用いた普通コンドライトコンドルールの高精度Mg同位体分析 (2017)
  • Author(s): 早川瑛庸、福田航平、飯塚毅、比屋根肇
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ (千葉県、千葉市)
  • Year and Date: 2017-05-20
• [Presentation] A combined study of Be-B and Al-Mg systematics on CH and CH/CB CAIs. (2017)
  • Author(s): 福田航平、藤谷渉、比屋根肇、杉浦直治、鹿児島渉悟、高畑直人、佐野有司
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ (千葉県、千葉市)
  • Year and Date: 2017-05-20
• [Presentation] High precision magnesium isotopic measurements for CV chondrite CAIs and LL 3.15 chondrite chondrules (2017)
  • Author(s): Hayakawa A., Fukuda K., Iizuka T. and Hiyagon H.
  • Organizer: 48th Lunar Planetary Science Conference
  • Place of Presentation: Woodlands (Texas, USA)
  • Year and Date: 2017-03-20
  • Int'l Joint Research
• [Presentation] MC-ICPMSを用いたコンドライト隕石の高精度Mg同位体分析 (2016)
  • Author(s): 早川瑛庸、福田航平、飯塚毅、比屋根肇
  • Organizer: 日本惑星科学会
  • Place of Presentation: ノートルダム清心女子大学、(岡山県、岡山市）
  • Year and Date: 2016-09-12
• [Presentation] An ion microprobe study of Be-B isotope systematics in melilite-rich CAIs based on newly determined Be/B relative sensitivity factors for glass standards. (2016)
  • Author(s): Fukuda K., Fujiya W., Hiyagon H., Sugiura N., Takahata N. and Sano Y.
  • Organizer: 79th Annual Meeting of the Meteoritical Society
  • Place of Presentation: Berlin (Germany)
  • Year and Date: 2016-08-07
  • Int'l Joint Research
• [Presentation] COおよびCHコンドライト中難揮発性包有物のBe-Bシステマティクス (2016)
  • Author(s): 福田航平、藤谷渉、比屋根肇、杉浦直治、高畑直人、佐野有司
  • Organizer: 日本地球惑星科学連合2016年大会
  • Place of Presentation: 幕張メッセ、千葉県
  • Year and Date: 2016-05-24
• [Presentation] 質量依存同位体分別から考察するアエンデ隕石F(UN)包有物前駆物質の化学組成 (2015)
  • Author(s): 福田航平、比屋根肇、高畑直人、佐野有司、橋元明彦
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ、千葉県
  • Year and Date: 2015-05-28
• [Presentation] 質量依存同位体分別から考察するアエンデF(UN)包有物前駆物質の化学組成 (2015)
  • Author(s): 福田航平、比屋根肇、高畑直人、佐野有司、橋元明彦
  • Organizer: 日本地球惑星科学連合2015年大会
  • Place of Presentation: 幕張メッセ（千葉県）
  • Year and Date: 2015-05-28
• [Presentation] A silicon isotopic study of a FUN-like forsterite-bearing inclusion from Allende (2015)
  • Author(s): Fukuda K., Hiyagon H., Takahata N., Sano Y. and Hashimoto A.
  • Organizer: 46th Lunar and Planetary Science Conference
  • Place of Presentation: ウッドランド（アメリカ）
  • Year and Date: 2015-03-19
• [Presentation] 二次イオン質量分析計を用いた難揮発性包有物の質量依存同位体分別に関する研究 (2014)
  • Author(s): 福田航平、比屋根肇、石田章純、高畑直人、佐野有司、橋元明彦
  • Organizer: 日本質量分析学会同位体比部会
  • Place of Presentation: 彩香の宿 一望（茨城県）
  • Year and Date: 2014-11-28