十块中国球粒陨石元素丰度特征研究

THE STUDY ON ELEMENTAL ABUNDANCES OF 10 CHONDRITES IN CHINA

利用仪器中子活化分析方法,对宁强、随州、枣阳、南通、肇东、广南、东台、清镇、武安、导河等陨石进行了多元素分析测定.给出了近40种元素含量结果.并对各类球粒陨石微量元素丰度特征、REE丰度特征以及宁强陨石元素丰度特征进行了讨论.

Precise determination of about 40 elemental abundances in 10 chondrites from China, which are Ningqiang CV3; Wuan H6; Qingzhen EH3; Suizhou L6; Zaoyang H5; Nantong H6; Zhaodong L4; Guangnan L6; Dontai LL6; Nan Yang Pao L6, are carried out by Instrumental Neutron Activation Analysis (INAA). The fractionation of all classes of chondrites relative to Cl tends to increase with the elemental volatility. The fractionation factors of REE relative to that of the type 1 carbonaceous chondrite are as follows: enstatite 0.67; oli-vine bronzite 0.78; hypersthene 0.83; type 2 carbonaceous (Murchison) 1.12; type 3 carbonaceous 1.29, thus showing a tendency to decrease in the order of C3, C2, C1, L, H, E groups. Ningqian Chondrit is an anomalous CV chondrite containing a low abundances oF bulk refractory lithophiles.