Nebular Fractionation, Classification and Formation Locationof Chrondritic Meteorites

球粒陨石的星云分异、分类及形成位置

• 批准号: 8816895
• 负责人: John Wasson
• 金额: $ 26.1万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816895&HistoricalAwards=false
• 关键词: Nebular; Fractionation; Classification; Formation; Locationof

The purpose of this project is to learn more of the history of the solar nebula by studying chondritic meteorites. The plan is to analyze chondrites to obtain compositional data that relate to: 1) the nebular processes that led to the formation of the chondrites, and 2) the heliocentric distances at which the different chondrite groups formed. Approximately 30 elements will be determined by high precision neutron activation analysis. The main current focus is on the study of unusual ordinary chondrites, particularly those that have compositions intermediate between those of members of the main (H, L, LL) groups. Phase analysis will be used to locate more of these and, in collaboration with other groups, bulk elememntal data and noble-gas isotopic data will be used to assess whether these originated in the same parent bodies as the main groups. Rare classes of chondrites will be analyzed, and fractionation trends among relted chondrites interpreted in terms of nebular fractionation processes.

这个项目的目的是了解更多的历史， 通过研究南极陨石来研究太阳星云。 该计划是 分析矿物以获得与之相关的成分数据 （1）星云的形成过程导致了 2）日心距离， 形成了不同的球粒陨石群。 约30种元素 将通过高精度中子活化分析来确定。 目前的主要焦点是研究不寻常的普通 特别是那些具有 介于主要成员（H、L、LL）之间 组 相位分析将用于定位更多的这些， 与其他小组合作，收集大量基本数据， 稀有气体同位素数据将用于评估这些 与主要群体起源于同一母体。 罕见 将分析碳酸盐的种类，以及分馏趋势 在用星云解释的相关星云中， 分馏过程。