美《国家地理》关于四川地震预警报道中引用论文的摘要

来源: 对角线 于 2008-05-20 03:11:06 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (2978 bytes)

来源：http://www.agu.org/pubs/crossref/2007/2006TC001987.shtml


TECTONICS, VOL. 26, TC4005, doi:10.1029/2006TC001987, 2007

Active tectonics of the Beichuan and Pengguan faults at the eastern margin of the Tibetan Plateau

Alexander L. Densmore
Institute of Hazard and Risk Research and Department of Geography, Durham University, Durham, UK

Michael A. Ellis
Center for Earthquake Research and Information, University of Memphis, Memphis, Tennessee, USA

Yong Li
National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan, China

Rongjun Zhou
Seismological Bureau of Sichuan Province, Chengdu, Sichuan, China

Gregory S. Hancock
Department of Geology, College of William and Mary, William*****urg, Virginia, USA

Nicholas Richardson
Department of Earth Sciences, Swiss Federal Institute of Technology, Zurich, Switzerland

Abstract

The steep, high-relief eastern margin of the Tibetan Plateau has undergone rapid Cenozoic cooling and denudation yet shows little evidence for large-magnitude shortening or accommodation generation in the foreland basin. We address this paradox by using a variety of geomorphic observations to place constraints on the kinematics and slip rates of several large faults that parallel the plateau margin. The Beichuan and Pengguan faults are active, dominantly dextral-slip structures that can be traced continuously for up to 200 km along the plateau margin. Both faults offset fluvial fill terraces that yield inheritance-corrected, cosmogenic 10Be exposure ages of
Received 28 April 2006; accepted 2 April 2007; published 17 July 2007.

Keywords: Tibetan Plateau; geomorphology.

Index Terms: 8107 Tectonophysics: Continental neotectonics (8002); 8111 Tectonophysics: Continental tectonics: strike-slip and transform; 7221 Seismology: Paleoseismology (8036); 1824 Hydrology: Geomorphology: general (1625).




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