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燕门凹断裂属金堆城断裂的一部分。金堆城断裂东起太子坪经王河沟脑至金堆城以西,全长九公里以上。断裂带不同部位宽窄不一。往往转弯处宽度较大,一般50米,最宽达200余米。断裂带总体走向北东60°,具体不同部位有所变化,到王河沟脑转为走向北东东70°,倾向南东,倾角40°—50°。断裂性质为长期活动的压扭性,后期主要显张性。断裂带中既有早期由于挤压或者
Yanmen concave fracture is part of the Jinduicheng fault. Jinduicheng fault east of Prince Edward River by Wang Hegou brain to Jinduicheng west, more than nine kilometers in length. Different parts of the fracture width varies. Often turning a wide area, usually 50 meters, the widest 200 meters. The fault belts generally go east 60 ° north, with specific changes in different parts. The brain of Wanghe ditch turns to east 70 ° northeast, with a dip of 40 ° -50 °. Fracture nature of long-term activities of the pressure of the twist, the latter part of the main dilatation. In the fault zone both early due to extrusion or