担水沟井田地质构造特征及其演化

 通过对担水沟地区的地质调查，研究了担水沟断层的野外地质特征及镜下显微构造特征，配套分析了区域内各期节理的发育情况，结合区域地质构造演化，恢复了担水沟断层的演化，并说明了其对北部担水沟井田地质构造形成的控制情况。结果表明：担水沟断层主要经历了燕山晚期近S-N向拉张作用、四川期S-N向反转挤压作用和喜马拉雅期同生正断层的叠加改造作用。在担水沟断层早期伸展作用时期，伴生了井田内部NW~NWW方向的正断层；四川期担水沟断层的逆冲挤压阶段控制了井田的总体格局——为一南陡北缓的轴向近EW的不对称向斜。

Structural feature and evolution of Danshuigou mining area

This paper presents an effort to investigate the Danshuigou area by observing the macro geologic characteristics of the Danshuigou fault and the microstructures of the tectonites, analyzing and sorting the joints. Combining with the geologic development of the area, it replays the geologic evolution of the Danshuigou fault: extension in late yanshan period, compression in Sichuan period, and a superposition of a contemporaneous normal fault in Himalaya period. In the first and second periods, the Danshuigou fault had controlled the formation of the Danshuigou mine.