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通过花岗岩体和中下地壳剖面岩石生热率的研究,显示出花岗岩体内生热率的分布至多样性;华北下地壳变质岩的生热率介于0.2-0.4uW/m3之间,其对热流的热贡献较小;地壳岩石生热率总体上是深度不连续的递减函数。中国东南地区出露着大面积的中生代花岗岩体,实测热流和岩石生热率没有得出可信的线性关系。结合对现有热流省资料的认识,提出了对热流和岩石生热率关系的新看法,解释了以往线性关系的不稳定性,估算出正常陆壳厚度的热流下限应为29.5mW/m2。
Through the study of the rock heat production rate of granite and middle and lower crust sections, the distribution of heat generation rate in granite is diversified. The heat production rate of the lower crustal metamorphic rocks in North China ranges from 0.2-0.4uW / m3 , Which contributes little to the heat flux. The crustal rock heat rate is generally a discontinuous decreasing function. A large area of Mesozoic granite is exposed in southeastern China. There is no credible linear relationship between the measured heat flux and the rock heat production rate. Based on the knowledge of the existing data of heat flow provinces, a new view on the relationship between heat flux and rock heat production rate is proposed, and the instability of the linear relationship was explained. The lower limit of heat flow of the normal continental crust thickness should be 29.5 mW / m2 .