摘要
本文根据海拉尔盆地沉积岩层中的放射性元素(U、Th、40K)含量以及深部岩层的地震波速,计算了盆地不同深度岩层的放射性生热率,然后采用“剥层法”从地表开始,自上而下地扣除盆地在不同演化阶段各岩层提供的热量,从而得到盆地在不同地质年代的地幔热流值,并在此基础上,讨论了盆地深部热流的演化特征。
According to the content of radioelements(U,Th,40K)in sedimentary rock layers and the seismic wave velocity of deep rock layers in Hailaer basin this paper calculates the radioactive heat generation ratio of different depth、rock layers in the basin.Then"layer stripping" is adopted beginning the surface fromto deduct the heat rate provided by various rocks in the basin in differently evolutional stages from top to bottom,thus abtaining the heat flow value of the mantle in the basin in differently geologic ages,And on this basis evolutional characteristics of heat flow of deep parts in the basin are discussed.