STUDY OF EXTRA-SOLAR MATERIALS ON THE VIEW OF OXYGEN ISOTOPES

从氧同位素的角度研究太阳系外物质

• 批准号: 03640666
• 负责人: YURIMOTO Hisayoshi
• 金额: $ 1.28万
• 依托单位: UNIVERSITY OF TSUKUBA
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640666/
• 关键词: METEORITE; CA,AL-RICH INCLUSION; OXYGEN ISOTOPE; SECONDARY ION MASS SPECTROMETRY; NEGATIVE HEAVY ION; 二次イオン質量分析法; アレンデ隕石

Extra-solar materials in Ca, Al-rich inclusions (CAIs) from Allende meteorite have been investigated in this projects. The project may be summarized as follows:(1)Concentration mapping of CAI minerals has been generated by electron micro probe analyzer. The results show crystallization sequences of the minerals.(2)A novel negative-metal ion source (BLAKE-V) for secondary ion mass spectrometry (SIMS) was developed for precise oxygen isotope analyses of CAI minerals.(3)A precise oxygen isotope analysis in CAI minerals was developed using the Au^- primary beam from the BLAKE-V ion source.(4)Oxygen isotope distribution was homogeneous in intra-mineral in CAI, whereas was quite heterogeneous among minerals. Such relationship cannot be interpreted by chemical equilibrium among minerals.(5)The origin of CAI may be interpreted as follows: (a)Spinel grains in CAIs ware crystallized in super novae remnant. (b)pyroxene grains were generated in the mixing gas between the solar nebula and the remnant at the most outer rim of the solar nebulae. (c)In the solar nebulae super cooling liquid was precipitated, and melilite and anorthite grains were crystallized in the liquid.

在该项目中，已经研究了来自Allende陨石的CA，富含AL的夹杂物（CAI）的极性材料。该项目可以总结如下：（1）CAI矿物质的浓度图已通过电子微探针分析仪生成。结果显示了矿物质的结晶序列。（2）开发了用于二级离子质谱法（SIMS）的新型负金属离子源（Blake-V），用于用于精确的CAI矿物质的精确氧同位素分析。（3）使用AU^-VER of（4 ies cai seripers of Blake-ventrience of）开发了精确的CAI同位素分析。在CAI的矿物内均质，而矿物质中的异质性是非常异构的。这种关系不能通过矿物质之间的化学平衡来解释。（5）CAI的起源可以解释如下：（a）在超级Novae Remnant中结晶的CAIS Ware中的尖晶石晶粒。 （b）在太阳星云中最外侧边缘的太阳星云和残留物之间的混合气中产生辉石晶粒。 （c）在太阳星云中沉淀出超级冷却液体，并在液体中结晶的梅里岩和钙石晶粒。

项目成果

Yurimoto, H., Oishi, K., Nagasawa, H., Yuasa, H. and Sueno, S.: "Sector-zoned pyroxene in Allende CAI and the implications for oxygen isotope distribution." Papers presented to the 16th sympos. Antarct. Meteor.60-61 (1991)

Yurimoto, H.、Oishi, K.、Nagasawa, H.、Yuasa, H. 和 Sueno, S.：“阿连德 CAI 中的扇形辉石及其对氧同位素分布的影响。”

Sakaguchi,I.: "Strontium and silicon simultaneous diffusion in single-crystal MgO." J.Am.Ceram.Soc.75. 3477-3480 (1992)

Sakaguchi,I.：“单晶氧化镁中锶和硅的同时扩散。”

Uegomori, H., Kurita, K., Yurimoto, H. and Sueno, S.: "Size distribution and shape analysis of metal particles in ordinary chondrites." Papers presented to the 17th sympos. Antarct. Meteor.77-78 (1992)

Uegomori, H.、Kurita, K.、Yurimoto, H. 和 Sueno, S.：“普通球粒陨石中金属颗粒的尺寸分布和形状分析。”

Sakaguchi, I., Yurimoto, H. and Sueno, S.: "Strontium and silicon simultaneous diffusion in single-crystal MgO." J. Am. Ceram. Soc.75. 3477-3480 (1992)

Sakaguchi, I.、Yurimoto, H. 和 Sueno, S.：“单晶 MgO 中的锶和硅同时扩散。”

山本 博規,圦本 尚義,森 義治,池上 清: "SIMS用負重イオン源の開発" Proc.BEAMS1991.111-114 (1991)

Hironori Yamamoto、Naoyoshi Kazumoto、Yoshiharu Mori、Kiyoshi Ikegami：“SIMS 负重离子源的开发”Proc.BEAMS1991.111-114 (1991)