A preliminary study on mineralogical and chemical compositions of some chondrites falling in China

Samples are available from 37 stony meteorites falling in China. Twenty-two chondrites are examined in terms of chemical and mineral compositions, cosmogenic nuclides, formation and exposure ages, impact effect and chondrule textures. On the basis of chemical-petrologic features these chondrites are classified asE 4 (Qingzhen),H 5 (Jilin, Changde, Shuangyang, Anlong, Xinyi and Yangjang),L 6 (Renqiu, Junan, Heze, Rugao and Nei Monggol) andLL 6 (Dongtai).