Thermal and Collision History of Jilin (H5) and Qingzhen (EH3) Chondrites  

作　　者：谢先德 黄婉康 

机构地区：[1]Institute of Geochemistry,Academia Sinica

出　　处：《Chinese Journal Of Geochemistry》1991年第2期109-119,共11页中国地球化学学报

摘　　要：This paper deals with the effects of thermal and collision events which had been experienced by the Jilin(H5) and Qingzhen(EH3) chondrites before they fell to the earth .The HRTEM and opti-cal microscopic investigations show that the Jilin chondrite has undergone more extensive thermal heating and two stages of collision,while the Qingzhen chondrite has experienced weak thermal events after the accretion of its parent body and one stage of moderate collision.The schematic dia-grams of the process of formation and evolution of these two meteorites are given in the present pa-per.This paper deals with the effects of thermal and collsion events which had been experienced by the Jilin(H5)and Qingzhen(EH3)chondrites before they fell to the earth. The HRTEM and opti- cal microscopic investigations show that the Jilin chondrite has undergone more extensive thermal heating and two stages of collision, while the Qingzhen chondrite has experienced weak thermal events after the accretion of its parent body and one stage of moderate collision. The schematic dia- grams of the process of fomation and evolution of these two meteorites are given in the present pa- per.

关 键 词：球粒状陨石 碰撞 热力学 高分辨率透射电子显微术 同位素年代学 地球 

分 类 号：P68[天文地球—地质学]