2001年11月14日新疆青海交界东昆仑山8.1级地震构造背景初探

PRELIMINARY STUDY ON SEISMOGENIC TECTONIC BACKGROUND OF KUNLUN M_S=8.1 EARTHQUAKE ON NOV.14, 2001 ON THE JUNCTURE OF XINJIANG AND QINGHAI, CHINA

2 0 0 1年 11月 14日中国新疆青海交界昆仑山中的 8.1级地震发生在东昆仑断裂的西段。这是一条大型活动块体边界断裂。青藏高原东北部向东逃逸而产生左旋剪切运动使该断裂成为一条青藏高原北部强震密集带。这次地震震中在北西西向东昆仑断裂与北东东向次级断裂的交汇部位 。

On Nov.14, 2001, a M\-S=8.1 earthquake occurred on the western segment of East Kunlun fault, the boundary of Xinjiang and Qinhai. The East Kunlun fault is a huge boundary fault between two blocks. It has the sinistral shearing due to the eastward escaping of the northeastern part of the Tibetan Plateau, which is a famous strong earthquake belt in north Tibetan Plateau. The M\-S=8.1 quake was centered in the conjunction of the NWW-trending East Kunlun fault and a NEE-trending secondary fault. The rupture is mono-propagating from the west to the east.