新疆伊犁喀什河断裂带及其活动性研究

通过对1812年新疆伊犁尼勒克地震的考察研究，认为该地震以地震断层为主体的地表地震形变带展布方向与发震断裂喀什河断裂带的走向一致。喀什河断裂带可分为3段，全长315km，它是由多条断层组成的活动断裂带，总体以逆冲活动为主，东段具有右旋扭错性质。喀什河断裂带具有长期发育的历史，它控制了中生代地层的分布，在新生代仍有多次活动并以垂直运动为主，晚第四纪以来的垂直活动速率为O．9—6mm／a。

RESEARCH ON KASHI RIVER FAULT IN YILI,XINJIANG AND ITS ACTIVITY

Based on the field investigation of the Nileke earthquake occurred on Mar. 8, 1812, it is thought that the surface extension of the earthquake deformation zone accords with the strike of Kashi River fault (causative fault). The Kashi River fault zone is 315 km long, consists of many active faults, which can be divided into 3 parts of the west, middle and east segments. It is mainly characterized by thrust fault movement, and with right-lateral torsional dislocation in the east segment. The Kashi River fault zone has long development history. It controlled the distribution of the Mesozoic strata, had many times of activities in the Cenozoic, and lots of them were vertical motions. The vertical active rate has been 0.9 -6 mm/a since late Quaternary.