摘要
根据实测大地热流数据，求出中国大陆主要构造单元的地壳平均生热率的上限值为１．３μ Ｗｍ－３，中国大陆的地壳平均生热率不应高于该值；相应的铀、钍、钾丰度上限值分别为２．０４（１０－６）、７．７６（１０－６）和２．０４（％）．据此对黎彤等近年发表的中国大陆及塔里木－华北板块地壳和岩石圈的铀、钍、钾元素丰度值进行检验．结果表明这些丰度值过高，不满足实测大地热流值的约束，这意味着黎彤等给出的铀、钍、钾的丰度值不可信．我们认为，根据出露地表的相应岩石的成分估计地壳和岩石圈地幔深部的微量元素丰度的研究方法，缺乏可靠的理论或实验基础．
The upper limit of crustal heat production in China continent was gotten as 1.3 uWm-3 based on the terrestrial heat flow data, and the crustal heat production of China continent should not be higher than this value; correspondingly, the upper limits of uranium, thorium and potassium abundance in crust are2.04(10-6), 7.76 (10-6) and2.04 (%), respectively, The abundance of U, Th and K in crust and lithosphere of China and Tarim-North China plate published by Li Tong and his co-workers was verified. The result shows that the heat production deduced from Li Tong's abundance of U, Th and K is obviously higher than the upper limit. This fact means that the abundance of U, Th and K by Li Tong et al. is unreliable. The authors argue that the methodology, which estimate tmce elements' abundance in lower part of crust or lithospheric mantle from compositions of exposed rocks, does not have a reliable background in theory or experiment.
出处
《地球物理学进展》
CSCD
2001年第3期21-30,共10页
Progress in Geophysics
基金
国家自然科学基金重点项目(49733110
49772155)
中国地质调查局国土资源大调查地质调查项目(K1.4-1-
关键词
生热率
生热元素丰度
大地热流
中国大陆
塔里木-华北板块
铀
钍
钾
岩石圈
Heat production
Abundance of heat production elements
Heat flow
Continental area of China
Tarim-North China plate
