普通球粒陨石的物理和岩石学性质及其分类参数

发布时间：2018-03-09 17:42

本文选题：陨石　切入点：球粒陨石　出处：《地球化学》2011年01期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:The physical and petrological properties of different chondrites, including the average size of chondrites, types of chondrites, composite chondrites, igneous chondrites and ratios of sulfides, Chemical composition and mineralogical characteristics can be used to distinguish the chemical-rock type and asteroid type of chondrites. These properties provide useful classification parameters for different chondrites and information about their forming environment. Because -17O of different chondrites is related to heliocentric distance, According to the formation of different chondrites, the dust content and -17O value of different chondrites formed in turn with the increase of distance from the sun to the sun. In turn, the chondrites were formed in order to form the chondrite group of RCV-CCKCM-CO, and it was speculated that the early solar nebula had had a continuous chemical fractionation.
【作者单位】：中国科学院广州地球化学研究所同位素年代学和地球化学重点实验室;
【基金】：国际极地年中国行动计划国家自然科学基金(40873054)
【分类号】：P185.83

【共引文献】