A study of the early solar system through systematic analysis of Antarctic meteorites

通过对南极陨石的系统分析研究早期太阳系

• 批准号: 14340172
• 负责人: KUSAKABE Minoru
• 金额: $ 4.99万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340172/
• 关键词: Antarctic meteorite; Oxygen isotopic rations; δ^<17>O-δ^<18>O plot; mass-dependent fractionation; mass-independent fractionation; early solar system; VSMOW-SLAP scale; 初期大陽系の形成過程; δ^<17>O-δ^<18>Oプロット

The oxygen isotopic ratios of terrestrial materials plot along a mass-dependent line of δ^<17>O=0.52×δ^<18>O in the δ^<17>O-δ^<18>O space, whereas those of extraterrestrial materials such as meteorites plot off the mass-dependent line depending on the types of meteorites. The extraterrestrial materials can be divided into mass-dependent and mass-independent groups. This reflects the occurrence of the processes that induced isotopic heterogeneity in the early solar system. Thus, the oxygen isotopic signatures of meteorites give an essential key to understand the early solar system processes. More than 13,000 meteorites have been found from Antarctica during the recent expeditions by National Polar Research Institute, most of them are yet to be analyzed for oxygen isotopic ratios.In the present study, we have analyzed the oxygen isotopic ratios of the following types of Antarctic meteorites : CO3(ALH-77003,ALH-77307,A-881632,Y-791717,Y-81020,Y-82050), CM2(B-7904,Y-791198,Y-82054,Y-86720,CK5-6(A-881551,Y-82102, Ureilite(A-881931,Y-74123,Y-790981,Y-791538), Diogenite(Y-74013), Eucrite(Y-790266,Y-791195,Y-791826,Y-791960,A-880702,A-880761,A-881388), EH6(Y-793225,Y-8414). In addition to the above Antarctic meteorites, some recent falls and finds from various places have also been analyzed. They include meteorites from Towada, Hiroshima, Mars (SNCs), and North West Africa(NWA-series). Most of the samples analyzed plot in the regions of known meteorite groups by Clayton (1993), but some plot in a new and unkown region. These meteorites need further studies for chemical, mineralogical and petrological examinations.During the course of this study, we have determined precise δ^<17>O and δ^<18>O values of the international standard materials such as VSMOW,SLAP,NBS28 quartz, NBS30 biotite, UWG2 garnet, San Carlos olivine, etc. This gave a basis for reporting the oxygen isotopic ratios of meteorites in the SMOW scale.

陆地物质的氧同位素比在 δ^<17>O-δ^<18>O 空间中沿质量相关线 δ^<17>O=0.52×δ^<18>O 绘制，而陨石等地外物质根据陨石的类型绘制出质量相关线。地外物质可以分为质量相关组和质量无关组，这反映了其发生情况。因此，陨石的氧同位素特征是了解早期太阳系过程的重要关键，国家极地研究中心在最近的探险中从南极洲发现了 13,000 多块陨石。研究所，其中大部分尚未进行氧同位素比分析。在本研究中，我们分析了以下类型的南极陨石的氧同位素比：CO3（ALH-77003，ALH-77307，A-881632，Y-791717，Y-81020，Y-82050），CM2（B-7904，Y-791198，Y-82054，Y-86720，CK5-6（ A-881551，Y-82102，脲石(A-881931，Y-74123，Y-790981，Y-791538)，闪长石(Y-74013)，除上述南极陨石外，Eucrite（Y-790266，Y-791195，Y-791826，Y-791960，A-880702，A-880761，A-881388），EH6（Y-793225，Y-8414）。还分析了最近的一些坠落和来自不同地方的发现，其中包括陨石。来自十和田、广岛、火星（SNC）和西北非洲（NWA 系列）的大部分样本分析了 Clayton（1993）已知陨石群区域的情况，但也有一些样本分析了新的未知区域。陨石需要进一步研究进行化学、矿物学和岩石学检查。在本研究过程中，我们测定了国际标准材料的精确δ^<17>O和δ^<18>O值如VSMOW、SLAP、NBS28石英、NBS30黑云母、UWG2石榴石、圣卡洛斯橄榄石等，为SMOW尺度陨石氧同位素比值的报告提供了基础。

项目成果

Noble gas and oxygen isotopic compositions of Towada H6-chondrite, a fall from Aomori Prefecture, Japan

日本青森县坠落的十和田 H6 球粒陨石的稀有气体和氧同位素组成

• 发表时间: 2003
• 期刊: Geochemical Journal 37
• 作者: Park J.;Okazaki;R.;Nagao;K.;Yoneda;S.;Kusakabe M.
• 通讯作者: Kusakabe M.

Relationship among O, Mg isotopes and the petrography of two spinel-bearing compound chondrules

• DOI: 10.1016/s0016-7037(03)00172-8
• 发表时间: 2003-10
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: S. Maruyama;H. Yurimoto

SMOW-scale for isotopic ratios of NBS-28 quartz and some other reference silicate minerals

NBS-28 石英和其他一些参考硅酸盐矿物的同位素比的 SMOW 尺度

• 发表时间: 2005
• 期刊: Geochimica et Cosmochimica Acta 69(印刷中)
• 作者: Kusakabe;M.;Matsuhisa;Y.
• 通讯作者: Y.

Park J., Okazaki, R., Nagao, K., Yoneda, S., Kusakabe M.: "Noble gas and oxygen isotopic compositions of Towada H6-chondrite from Aomori Prefecture, Japan"Geochemical Journal. 37. 639-648 (2003)

Park J.、Okazaki, R.、Nagao, K.、Yoneda, S.、Kusakabe M.：“日本青森县十和田 H6 球粒陨石的稀有气体和氧同位素组成”地球化学杂志。

CO_2 lser-BrF_5 fuorination tchnique for analysis of oxygen three isotopes of rocks and minerals.

CO_2 lser-BrF_5氟化技术用于岩石和矿物氧三同位素分析。

• 发表时间: 2004
• 期刊: J.Mass Spectrom.Soc.Jpn. 52
• 作者: Kusakabe;M.;Maruyama;S.Nakamura;T.;Yada;T.
• 通讯作者: T.