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普通球粒陨石的物理和岩石学性质及其分类参数
Physical and petrologic properties of ordinary chondrites and their taxonomic parameters

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文摘 不同球粒陨石群的物理和岩石学性质,包括球粒的平均大小,球粒结构类型,复合球粒,带火成边球粒及含硫化物的比例,化学组成及矿物学特征等可用以划分球粒陨石的化学-岩石类型和小行星类型,这些性质提供了不同球粒陨石群有用的分类参数及其形成环境的信息.由于不同球粒陨石群的-17O与日心距离存在有相关关系,因此,依据不同球粒陨石群形成时的尘粒量和-17O值随着距太阳距离的增大依次形成:EH-EL,OC(H,L,LL),R,CR,CV-CK,CM-CO球粒陨石群,并推测早期太阳星云内曾发生过连续的化学分馏作用
其他语种文摘 The physical and petrologic properties of the different chondrite groups, including mean size of the chondrules, proportions of the chondrule textural types, proportions of compound chondrule, the proportions of chondrules with igneous rims, and the proportions of chondrules that contain sulfide, chemical compositions and mineral features derived from the early solar nebula are used to classify chemical-petrologic types and asteroids. These properties provided useful taxonomic parameters for different chondrite group(EH,EL,H,L,LL,R,CV,CK,CR,CM,CO) and the information of their formation environment in which chondrules formed. There is correlation between -17O and heliocentric distance for these chondrite groups. Thus, different chondrite groups may be put in the order of EH-EL,OC(H,L,LL),R,CR,CV-CK,CM-CO, with increasing heliocentric formation distance, based on the amount of dust present where they formed and -17O values of different chondrite groups. We infer that continual chemical fractionation occurred in the early solar system
来源 地球化学 ,2011,40(1):35-44 【核心库】
关键词 陨石 ; 球粒陨石 ; 分类 ; 分类参数
地址

中国科学院广州地球化学研究所, 中国科学院同位素年代学和地球化学重点实验室, 广东, 广州, 510640

语种 中文
文献类型 研究性论文
ISSN 0379-1726
学科 天文学;地质学
基金 国际极地年中国行动计划 ;  国家自然科学基金
文献收藏号 CSCD:4153056

参考文献 共 37 共2页

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