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青藏高原东缘活动构造
引用本文:周荣军,李勇,Michael A.Ellis,何玉林,王凤林,黎小刚.青藏高原东缘活动构造[J].矿物岩石,2006,26(2):40-51.
作者姓名:周荣军  李勇  Michael A.Ellis  何玉林  王凤林  黎小刚
作者单位:1. 四川省地震局工程地震研究所,四川,成都,610041
2. 成都理工大学油气藏地质及开发工程国家重点实验室,四川,成都,610059
3. Institute of Geology,Department of Earth Sciences, ETH Zentrum ,CH-8092 Zürich ,Switzerland
4. Center for Earthquake Research and Information ,University of Memphis ,3890 Central Avenue ,Memphis ,TN 38152 ,USA
基金项目:国家自然科学基金(49802013,40372084),地震科学联合基金(95-07-0425),美国国家科学基金(EAR-980344)
摘    要:青藏高原东缘由岷山断块和龙门山构造带构成。以活动构造地貌学为主线,在解析该地区主干断裂晚第四纪以来活动的地质地貌表现的基础上,对一批断裂运动学和史前强震活动的定量数据进行分析研究,结果表明:在岷山断块中,虎牙断裂的平均左旋滑动速率为1.4 mm/a,垂直滑动速率为0.3 mm/a。岷江断裂的平均垂直滑动速率介于0.37 mm/a~0.53 mm/a之间,左旋位错量与垂直位错量大致相当;在龙门山构造带中,茂汶-汶川断裂、北川-映秀断裂和彭县-灌县断裂的平均垂直滑动速率均在1 mm/a左右,且几条主干断裂的右旋位错量与垂直位错量相当。结合震源机制解结果和GPS测量资料,建立晚新生代以来青藏高原东缘向南东方向逸出的构造变形模式。

关 键 词:构造地貌  滑动速率  强震复发  青藏高原东缘
文章编号:1001-6872(2006)02-0040-12
收稿时间:2006-01-18
修稿时间:2006-03-02

ACTIVE TECTONICS OF THE EASTERN MARGIN OF THE TIBET PLATEAU
ZHOU Rong-jun,LI Yong,Alexander L Densmore,Michael A.Ellis,HE Yu-lin,WANG Feng-lin,LI Xiao-gang.ACTIVE TECTONICS OF THE EASTERN MARGIN OF THE TIBET PLATEAU[J].Journal of Mineralogy and Petrology,2006,26(2):40-51.
Authors:ZHOU Rong-jun  LI Yong  Alexander L Densmore  Michael AEllis  HE Yu-lin  WANG Feng-lin  LI Xiao-gang
Institution:ZH0U Rong-jun, LI Yong, Alexander L Densmore, Michael A. Ellis, HE Yu-lin, WANG Feng-lin, LI Xiao-gang
Abstract:The eastern margin of the Tibet Plateau is composed of the Minshan Block and Longmenshan.Studies on tectonic landform show that the average sinister slip rate is 1.4 mm/a with a vertical rate of 0.3 mm/a along the Huya fault since late Quaternary.The average vertical slip rate is between 0.37 mm/a and 0.53 mm/a along the Minjiang fault and the sinister slip is similar to the vertical one.Among the Longmenshan Tectonic Zone,the Wenchuan-Maowen fault,Beichuan-Yingxiu and Penxian-Guanxian faults have the average vertical slip rates of 1 mm/a respectively,and show same amount of right and vertical offsets.Based on the data of focal mechanism and GPS survey,a tectonic deformation model of southeastwards extrusion of the eastern marigin of the Tibet Plateau is proposed.
Keywords:tectonic landform  slip rate  strong earthquake recurrence  eastern margin of the Tibetan Plateau
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