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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.
According to the measured geothermal data, the upper crustal average heat rate of the main tectonic units in China is calculated to be 1.3μ Wm-3, and the average crustal heat rate in mainland China should not exceed this value. Corresponding uranium, The upper limits of thorium and potassium were 2.04 (10-6), 7.76 (10-6) and 2.04 (%), respectively. Based on this, the abundance of uranium, thorium and potassium in the crust and lithosphere of the mainland China and the Tarim-North China plate published by Li Tong et al. The results show that these abundance values are too high to meet the constraints of the measured geothermal heat values, which means that the abundance values of uranium, thorium and potassium given by Li Tong et al. Are not credible. We believe that there is no solid theoretical or experimental basis for the study of estimating the abundance of trace elements in the deep mantle of the crust and lithosphere based on the composition of the corresponding rocks exposed from the surface.