青藏高原地壳的伸缩及其力学性质

收稿日期: 1999-07-20

刊出日期: 1999-06-28

CRUSTAL EXTENSION-SHORTENING OF QINGHAI-TIBET PLATEAU AND MECHANINCAL PROPERTIES IMPLICATIONS

Received Date: 20 July 1999

Publish Date: 28 June 1999

摘要: 根据青藏高原地壳厚度,采用平衡剖面法对地壳伸缩量进行了粗略的计算,表明其水平缩短约1400km,垂直方向伸张约30km或25km.如此巨大的地壳伸缩量证明了青藏高原地壳为弹粘性体,绝非所谓的刚性板块。
- 青藏高原 /
- 地壳伸缩 /
- 弹粘性体 /
- 非弹性形变 /
- 刚性板块
Abstract: The amount of extension and shortening of the crust of the Qinghai-Tibet plateau is roughly calculated from its thickness using the method of balanced section.The results show that it has shortened about 1400km in the N-S direction and extended 25~30km in the vertical direction.Such a tremendous shortening and extension may indicate that the crust of Qinghai-Tibet plateau behaves as a elasto-viscous rather than rigid body.
- Qinghai-Tibet plateau /
- Crustal shortening-extension /
- Elasto-viscous body /
- nonelastic deformation /
- rigidity plateau