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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。