首页|期刊导航|地质学报（英文版）|Active Tectonics of the Longmen Shan Region on the Eastern Margin of the Tibetan Plateau

Active Tectonics of the Longmen Shan Region on the Eastern Margin of the Tibetan Plateau

地质学报（英文版）2007，Vol.81Issue(4)：593-604,12.

Active Tectonics of the Longmen Shan Region on the Eastern Margin of the Tibetan Plateau

作者信息

1. Institute of Earthquake Engineering, Seismological Bureau of Sichuan Province,Chengdu 610041, China;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu 610059, China;Institute of Geology, Department of Earth Sciences, ETH Zentrum, CH-8092 Zürich, Switzerland;Center for Earthquake Research and Information, University of Memphis, 3890 Central Avenue, Memphis, TN38152, USA;Institute of Earthquake Engineering, Seismological Bureau of Sichuan Province,Chengdu 610041, China;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu 610059, China;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu 610059, China;Institute of Earthquake Engineering, Seismological Bureau of Sichuan Province,Chengdu 610041, China
折叠

摘要

Abstract

There is a massive amount of geomorphic evidence for active tectonics in the Longmen Shan at the eastern margin of the Tibetan plateau. We have surveyed some typical geomorphic markers including the Wenchuan-Maowen, Beichuan-Yingxiu and Pengxian-Guanxian faults, terrace offsets,scarps, fault-controlled saddles, dextral shutter ridges, dextral channel offsets, graben, shatter belts,and pull-apart basins. Electron spin resonance (ESR) and thermoluminescence(TL) ages were obtained using silty sand taken from below the surface of the sediments. According to these data, we calculated the rates of thrusting and strike-slip, and the results indicate that Cenozoic tectonic shortening at the plateau margin is minor with the rate of thrusting less than 1.10 mm/a and the rate of strike-slipping less than 1.46 mm/a. The Longmen Shan is a zone of NNE-trending dextral shear with slip-dip ratio of 6:1-13:1. From NW to SE, the thrust component becomes smaller, whereas the strike-slip component becomes larger.

关键词

tectonics/strike-slip thrusting/Late Cenozoic/Longmen Shan/Tibetan plateau

Key words

tectonics/strike-slip thrusting/Late Cenozoic/Longmen Shan/Tibetan plateau

分类

天文与地球科学

引用本文复制引用

..Active Tectonics of the Longmen Shan Region on the Eastern Margin of the Tibetan Plateau[J].地质学报（英文版）,2007,81(4):593-604,12.

基金项目

This research was supported by the National Nature Foundation of China (49803031, 40372084) （49803031, 40372084）

the Seismic Scientific United Fund (95-07-0425) （95-07-0425）

US National Science Foundation grant EAR-0125565 （）

ETH Forschungskommission grant TH-4/03-01 （）

Key Subject Program of Sichuan province Grant No. SZD0408 （）

and the Program for the Subject of Ph.D. in Higher Education Institute, Grant No.20050616004. （）

地质学报（英文版）

ISSN：1000-9515

访问量6

下载量0

段落导航