浅析永胜县分水岭铜矿地质特征及矿床成因

Geological characteristics and genesis of the watershed copper deposit in Yongsheng County

云南省永胜县分水岭铜矿位于永胜县城北东78°方向,平距约9km处,地处羊坪乡境内。位于扬子陆块区的上扬子古陆块西带,三级构造单元盐源-丽江被动陆缘带内,东侧紧邻楚雄陆内盆地。南北向程海断裂与北东向箐河断裂是区内深大断裂,同时也是丽江台缘褶皱带与川滇台背斜的分界线。区域历经多期次、多旋回的构造运动,为该区岩浆活动及岩浆热液型矿床的形成提供了非常有利的条件。目前在该区已发现多处斑岩型Cu、Mo、Au、Ag、Pb矿床(点),显示该区优越的找矿前景。文中主要对永胜县分水岭铜矿地质特征及矿床成因进行探讨,旨在对该区找矿工作能够提供一定的指导作用。

The Yongshui County Watershed Copper Mine in Yongsheng County, Yunnan Province is located at 78° east of Yongsheng County, with a horizontal distance of about 9 km. It is located in Yangping Township. Located in the western part of the Upper Yangtze Paleocontinent in the Yangtze Block, the third-level tectonic unit Yanyuan-Lijiang passive continental margin zone, and the east side is adjacent to the Chuxiong intracontinental basin. The north-south Chenghai fault and the NEtrending Weihe fault are deep faults in the area, and are also the boundary line between the Lijiang Taiyuan fold belt and the Sichuan-Taiwan platform anticline. The tectonic movement of the multi-period and multi-cycle in the region provides very favorable conditions for the formation of magmatism and magmatic hydrothermal deposits in this area. At present, a number of porphyry Cu, Mo, Au, Ag, Pb deposits（points） have been discovered in this area, indicating superior prospecting prospects in this area. The paper mainly discusses the geological characteristics of the watershed copper deposit in Yongsheng County and the genesis of the deposit, aiming to provide a certain guiding role for the prospecting work in this area.