摘要
中国陆壳的平均厚度为４７ｋｍ。其上地壳厚３１ｋｍ，沉积层厚５ｋｍ。质量分别为：中国陆壳１２．４３７×１０１７ｔ，上陆壳８．００５×１０１７ｔ，沉积层１．１４６×１０１７ｔ。上陆壳／下陆壳的质量比例为１．８：１。根据２２４６个岩石化学全分析资料和微量元素平均含量补充资料，求出了中国陆壳及其沉积层和上陆壳的化学元素丰度。１３种常量元素的丰度总和，占中国陆壳质量的９９．６％，其余大量微量元素仅占０．４％。文中还讨论了稀土元素、元素对和成矿元素等特征。
The average thickness of the China’s continental crust(CCC)is 47 km,of which the upper continental crust (CUCC) is 31km, and the sedimentary layer(CSL) is 5km.The mass is 12.437×1017,8.005×1017 and 1.146×1017 metric tons respectively for CCC,CUCC and CSL.The mass ratio of the upper to the lower continental crust is 1.8:1.The element abundances were calculated for CCC,CUCC and CSL,respectively,based on the chemical compositions of 2246 samples of various rock types and some complementary data of trace elements. The total abundance of 13 major elements represents 99.6% of the mass of the China’s continental crust,and only 0.4% is counted for by numerous minor elements. Characteristics of rare earth elements,abundance ratios of paired elements and the amounts of metallogenetic elements are also discussed in this paper.
出处
《地球化学》
CAS
CSCD
北大核心
1994年第2期140-145,共6页
Geochimica
关键词
中国陆壳
沉积层
上陆壳
化学元素
China’s continental crust,upper China’s continental crust,China’s sedimentary layer,element abundance
