lower crust

常见例句

In general, the composition of lower crust is close to basalt and the composition of upper crust is similar to granite.
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。
The composition, structure and evolution of the middle-lower crust has been an subject of extensive study in Earth sciences.
中下地壳组成、结构与演化研究一直是地球科学研究中为人们关注的重要课题。
The lithochemistry, REE and isotope characteristic of strontium, oxygen and lead of Laowan granite show that the granite originates from lower crust by partial melting.
老湾花岗岩的岩石化学、稀土元素和同位素特征指示出老湾花岗岩源于下地壳经部分熔融作用形成。