扬子准地台西北边缘地区地壳稳定性问题  

Stability of the Northwest Edges of Yangtze Paraplatform

作　　者：何耀灿[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041

出　　处：《山地学报》2009年第4期490-495,共6页Mountain Research

摘　　要：5.12汶川8级大地震影响到整个四川盆地西部地区,该区是扬子准地台与青藏高原造山带的结合部位——台槽交接区,特殊的地震地质构造及其活动性,加上人类活动的影响,使得那里的地壳变得非常脆弱。扬子准地台从早期到晚期的发展过程中活动性比较大,基底硬化程度较低,有显著而广泛的褶皱和断裂运动。在此着重探讨四川盆地以西即从东面的龙泉山开始经成都平原至龙门山地区地壳稳定性问题。The Wenchuan earthquake on May 12, 2008 struck all the conjunction of the Yangtze Paraplatform and the Tibet-Qinghai the west of Sichuan Basin, which is located in tectonic zone. The specialty and activity of the tectonics and the human behaviors make the crust fragile and crumbly. The paraplatform evolves in different man- ners from the early to the late period. Its base is relatively less consolidated and the folds and faults develop exten- sively. This paper focuses on the stability of the crust from the Longquan Mountains in the east through the Chengdu Plain to the Longmen Mountains in the west.

关 键 词：地震地质构造 地震成因 水库诱发 人类活动 

分 类 号：P315.2[天文地球—地震学] P54[天文地球—固体地球物理学]