lower crust
下地壳
常用释义
英式发音
美式发音
基本释义
- 下地壳，下部地壳：指地球的地壳中位于上地壳之下的部分。
例句
-
1·The middle crust and the lower crust is in the ductile field.上地壳表现为脆性变形，中、下地壳为韧性的流动变形。
-
2·In lower crust, faults often consist of a series of secondary fractures.发育于地壳浅层中的脆性断层常常由一系列次级小断层所构成。
-
3·The primitive Pb was mainly derived from the lower crust and upper mantle;矿床中的 原 始铅主要来源于地壳深部或上地幔；
-
4·Thus it is indicated that they are the products of lower crust environment.由此说明，是下地壳环境的产物。
-
5·The metallogenic source material comes from the upper mantle and the lower crust.成矿物质来源于上地幔和下地壳。
-
6·The crust is multilayered and there exists a low velocity layer in the lower crust.地壳由多层介质组成，在下地壳中存在着低速层。
-
7·It is postulated that a high conductive body exists in the lower crust or upper mantle.据此推测在地壳下部或地幔上部存在一高导体。
-
8·The faulting might be attributed to the ascending lower crust-derived fluids after the Late Miocene epoch.造成断裂分期活动的原因是藏东地区下地壳流体的存在。
-
9·The parent magma of several rock series formed earliest originated from the lower crust of granulite facies;最初形成的岩系的母岩浆，起源于麻粒岩相的下地壳。
-
10·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。