Abstract: In this paper a fracture zone caused by Aug. 11, 1931 Fuyun earthquake in Xinjiang province is detailly described, and the seismogenic structure and its recent tectonic movement are discussed.This seismic fracture zone has developed superimposedly on the NNW-trending Kok-tohai-Ertai fault, its southern end is beyond the old fracture. The full length of this zone is 170 km. General trend is N342癢. The fault plane dips to north-west at an angle of 70?. The occurence of seismogenic fault, mountain ridges and ravines show that the movement is mainly horizontal with right-lateral wrench.The great Fuyun earthquake of 8.0 magnitude is an appearance of the recent movement along the Koktohai-Ertai fault, and this movement has a clearly inherit nature in terms of the regional stress state, fracture mechanism and pattern movement.

摘要： 本文对1931年8月11日富蕴8.0级地震造成的地震断裂带作了较详细的叙述,探讨了发震构造及其新构造运动特征。地震断裂带是在北北西向的可可托海-二台断裂的基础上发展的,南端已超出老断裂范围。全长170公里,总体走向北西342°,断裂面多向北东倾斜,倾角70°左右。从地震断裂的组合形式及山脊、冲沟错动情况,显示出水平运动为主的右旋扭动特征。富蕴8.0级大地震是可可托海-二台断裂新活动的体现,无论在区域受力状况,断裂力学性质和运动方式等方面,都具有强裂的继承性活动特征。