我国九个普通球粒陨石的岩石学研究  

PETROLOGY OF NINE ORDINARY CHONDRITES FROM CHINA

作　　者：王道德[1] Alan E.Rubin 

机构地区：[1]中国科学院地球化学研究所 [2]美国加利福尼亚大学洛杉矶分校地球物理和行星物理研究所

出　　处：《地球化学》1987年第4期295-302,共8页Geochimica

摘　　要：对我国新近降落的九个普通球粒陨石进行了岩石学和矿物学的研究,在此基础上划分了9个球粒陨石的化学-岩石类型,它们是南通(H_6)、枣阳(H_5)、肇东(L_4)、启东(L-LL_5)、饶阳(L_6)、射阳(L_6)、广南(L_6)、随州(L_6)及导河(L_6)球粒陨石。Described and classified in this paper are nine twentiethcentury ordinary chondrite falls from China, including Nantong (H6), Zaoyang (H5) Zhaodong (L4), Qiclong (L-LL5), Rao-yang (L6), Sheyang (L6), Guangnan (L6), Suizhou (L6) and Daohe (L6). Karnacite in Qi-dong is rare and contains much more Co (15mg/g) than that in L-group chondrites; Qidong may be a member of a chondrite group intermediate in its properties between L and LL. Zhao-dong, Qidong, Raoyang, Sheyang and Suizhou have several olivine and/or low-Ca pyroxene grains with aberrant Fe/(Fe + Mg) ratios. It is probable that these five chondrites are frag-mental breccias. No correlation between shock facies and occurrence of aberrant silicate grains suggests that breccia lithification caused only minimal shock effects in many meteorites. Alternatively, postshock annealing may have resulted in the recrystallization of shock-indica-ting phases, leading to assignment of a shock facies that is lower than that is present immedia-tely after the shock event.

关 键 词：陨石 球粒结构 岩石学 矿物学 

分 类 号：P185.83[天文地球—天文学]