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1.门源6.4级地震的构造背景及其形变监测资料1986年8月24日门源6.4级地震区及其附近,主要分布有四条总体呈北西西走向的大断裂(图1),即祁连山北缘断裂FD、肃南—老君山—冷龙岭断裂F_1、清大坂—豹子崖—冷龙岭主峰断裂F_2及属于北祁连构造带主干断裂之一的F_3断裂,即昌马—俄博—古浪—海原巨型断裂带的组成部分。上述F_1、F_2断裂于冷龙岭主峰东端均截止于F_3。且这三条断裂
1. The tectonic setting of M6.4 earthquake in Mengyuan County and its deformation monitoring data There are mainly four large faults with northwest-west strike (Fig. 1) in the vicinity of the M6.0 source of M6.0 Aug. 24, 1986, ie the Qilian Mountains F_3 fracture of the northern margin, F_1 of the Sunan-Laojunshan-Lenglongling fault, F_2 of the Qingdaiban-Leopard Cliff-Lenglongling fault and one of the main faults that belong to the North Qilian tectonic belt, ie, Changma-Rokbo - Gulang - Haiyuan giant fracture zone components. The F_1 and F_2 faults above the east end of Lenglingling peak ended at F_3. And these three break