ACTIVE TECTONICS OF THE EASTERN MARGIN OF THE TIBET PLATEAU
ACTIVE TECTONICS OF THE EASTERN MARGIN OF THE TIBET PLATEAU
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发表时间：
2006
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通讯作者：
Li Yong;Li Xiao-gang
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作者：
Li Yong;Li Xiao-gang
构造地貌研究表明，晚第四纪以来虎牙断裂带沿断层的平均滑动速率为1.4 mm/a，纵向滑动速率为0.3 mm/a。岷江断裂的平均垂直滑动速率在0.37 ~ 0.53 mm/a之间，与垂直滑动相似。在龙门山构造带中，汶川—毛文断裂、北川—映秀断裂和彭县—灌县断裂的平均垂向滑动速率分别为1 mm/a，右偏移量和垂向偏移量相同。
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.