Active tectonics and erosional unloading at the eastern margin of the Tibetan Plateau

被引：0
作者：
Alexander L. Densmore
Yong Li
Michael A. Ellis
Rongjun Zhou
机构：
[1] ETH Zentrum,Institute of Geology, Department of Earth Sciences
[2] Chengdu University of Technology,National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
[3] University of Memphis,Center for Earthquake Research and Information
[4] Seismological Bureau of Sichuan Province,Institute of Earthquake Engineering
来源：
Journal of Mountain Science | 2005年 / 2卷 / 2期
关键词：
Tibetan Plateau; tectonic; erosional unloading; faulting;
D O I：
10.1007/BF02918330
中图分类号：
学科分类号：
摘要：
The eastern margin of the Tibetan Plateau is marked by an extremely steep mountain front with relief of over 5 km. This topography, coupled with abundant Mesozoic thrusts within the margin, explains why tectonic maps of the India-Asia collision typically show the eastern margin as a major thrust zone. Actually, it does not like that. Field observations suggest that the margin is better characterized as a zone of NNE-directed dextral shear with extensive strike-slip faulting and secondary thrusting. The high relief and steep gradients are partially explained by erosional unloading of an elastic lithosphere; the pre-erosion inherited topography may be the inherited Mesozoic thrust belt landscape modified by a component of Cenozoic tectonic shortening.
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页码：146 / 154
页数：8
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