浅析云南兰坪县大村头金矿区成矿条件

Analysis of metallogenic conditions of the Da tou tou gold deposit in Lanping County, Yunnan

兰坪县大村头金矿的地理位置在沘江与澜沧江断裂之间,矿区的出露地层主要有下第三系果郎组、云龙组;南新组,下白垩统景星组、上白垩统虎头寺组;中侏罗统花开左组;上侏罗统坝注路组等地层。断裂构造发育,断裂构造既容矿又控矿,矿(化)体基本赋存在构造破碎带中,其矿化的主要标志是褐铁矿。构造规模与成矿呈正比例关系,然而与地层岩性的关系并不大。矿区内的破碎带是探寻铅锌矿、铜、汞、铁、金等的主要找矿空间。

The geographical location of the daunjiang gold deposit in Lanping county is between the Yangtze River and the Lancang River fault, and the outcropping strata in the mining area mainly include the lower three line Guo Lang group,Yunlong formation, the south new formation, the lower Cretaceous Jingxing formation, the upper Cretaceous tiger head Temple group, the Middle Jurassic flower left group and the upper Jurassic dam injecting formation. The fault structure is developed, the fault structure is both ore hosting and ore controlling, and the ore body is basically in the tectonic fracture zone. The main sign of mineralization is limonite. Tectonic scale is proportional to mineralization, but it has little relationship with lithology. The fractured zone in the mining area is the main prospecting space for lead-zinc ore, copper, mercury, iron and gold.