南极格罗夫山陨石GRV053645的岩石矿物学特征  

Petrography and Mineralogy of Grove Mountains Meteorite GRV053645

作　　者：辛补社[1,2] 王世杰[1] 李世杰[1] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002 [2]中国科学院研究生院,北京100049

出　　处：《矿物岩石地球化学通报》2010年第3期264-269,共6页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国科学院知识创新工程重要方向项目(KZCXZ-YW-110);国家科技基础条件平台建设项目(2005DKA21406);贵州省基金项目(2008GZ02717;2010GZ4439)

摘　　要：南极格罗夫山陨石GRV053645是一块非常原始的普通球粒陨石,它很好地保存有太阳星云凝聚和增生的相关信息,对研究太阳星云的起源意义重大。本文描述了这块陨石的岩石矿物学特征,包括球粒结构类型、基质不透明、橄榄石和低钙辉石具有明显的成分环带等。根据Fe-Ni合金含量、球粒平均直径大小和橄榄石平均Fa值,表明这块陨石属于低铁群(L)。利用橄榄石Fa的PMD值与岩石类型亚类的相关性,其岩石类型应为3.4亚类。该陨石冲击变质程度和风化等级都比较低,分别为S2和W1。GRV053645 is a primitive ordinary chondrite,it is well preserved and recorded the information of the condensation and accretion of early solar nebula,and it is of great significance in studying the origin of solar nebula.This paper mainly depicted the petrography and mineral chemistry of GRV053645,including very sharp-outlined chondrules,almost opaque fine-grained matrix,and zoned grains of olivine and low-ca pyroxene.According to abundance of metallic Fe-Ni,mean chondrule diameter,and mean Fa content of olivine,GRV053645 is classified as a Lordinary chondrite.Meanwhile,based on the relationship between the PMD of Fa of olivine and subtype of ordinary chondrites,the petrographic subtype of GRV053645 is 3.4.The shock stage is classified as S2,and the weathering grade is classified as W1.

关 键 词：南极陨石 格罗夫山 GRV053645 岩石矿物学 

分 类 号：P573[天文地球—矿物学]