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云南巍山-永平矿集区有铜金多金属中小型矿床及矿化点140余处,位于兰坪走滑拉分盆地南段,盆地发育和成矿作用与印度-亚洲板块碰撞密切相关。矿集区可分为紫金山背斜与公郎弧两个成矿流体系统。紫金山背斜成矿流体系统成矿流体的pH值为5.3～7.1,Eh值为-0.11V～2.84V,成矿压力为30MPa～130MPa,成矿温度为228℃～255℃,成矿深度在1.05km～6.67km。公郎弧成矿流体系统成矿流体的pH值为6.7～7.9,Eh值为-0.83V～0.11V,成矿压力为100MPa～225MPa,成矿温度为317℃～346℃,成矿深度为3.51km～7.89km。与紫金山背斜成矿流体系统相比,公郎弧成矿流体系统具有较高的成矿压力、成矿温度、成矿深度、pH值和较低的Eh值。但二者均属弱还原的中性-弱碱性成矿环境。
There are more than 140 copper-gold polymetallic deposits and mineralized sites in the Weishan-Yongping Ore Concentration Area of Yunnan Province, located in the southern section of the strike-slip pull-apart basin in Lanping. The basin development and mineralization are closely related to the Indian-Asian plate collision . The ore-collecting area can be divided into two ore-forming fluid systems of Zijin Mountain anticline and Gong Lang arc. The pH value of ore-forming fluid in Zijin Mountain anticline is 5.3 ~ 7.1, Eh is -0.11V ~ 2.84V, metallogenetic pressure is 30MPa ~ 130MPa, metallogenetic temperature is 228 ℃ ~ 255 ℃, mineralization depth At 1.05km ~ 6.67km. The metallogenetic fluid in the Langlang arc has a pH of 6.7 ~ 7.9, an Eh value of -0.83V ~ 0.11V, a metallogenetic pressure of 100MPa ~ 225MPa, a metallogenetic temperature of 317 ℃ ~ 346 ℃ and a metallogenic depth of 3.51 km ~ 7.89km. Compared with the metallogenic fluid system of the Zijin Mountain anticline, the Langlang arc ore-forming fluid system has higher metallogenetic pressure, metallogenic temperature, metallogenic depth, pH value and lower Eh value. However, both of them are weakly-reduced neutral-weak alkaline metallogenic environments.