一般来说，下地壳的成分接近于玄武岩，而上地壳的物质成分与花岗岩相似。
In general, the composition of lower crust is close to basalt and the composition of upper crust is similar to granite.
岩石生热率在上地壳的分布是随深度的增加而减小的，但在沉积盆地的深度范围内几乎不变，其分布是均匀的，仅不同岩性的生热率差别较大。
The radiogenic heat production rate in the upper crust decreased with the increasing depth. However, they were distributed uniformly within the depth scale of sedimentary basin.
辉绿岩脉是来自于幔源，没有受到上地壳物质的污染。
Doleritic veins are made sure of mantle source, which did not mix with upper crust matter.
应用推荐