黄山市仙王坛铅锌银矿矿床地质特征及找矿方向

黄山市仙王坛铅锌银矿位于皖南山区成矿带内,处在江南隆起的东北端黄山凹断褶束中部,羊栈岭台拱和休宁断陷的衔接部位。区内出露有元古界环沙组、牛屋组及震旦系休宁组;断裂是矿区内主要的控矿构造;辉绿岩脉是本矿床形成的物质来源。Ⅰ号铅锌银矿体是本矿床主要矿体,呈脉状产于F9断裂破碎带中,矿石矿物主要为方铅矿、闪锌矿、自然银,矿床成因类型属中、低温热液充填交代型。找矿方向为矿床深部和本区外围与之地质条件相似的区域。

GeoloGiCAl feAtureS AnD ore-proSpeCtinG DireCtion of the xiAnwAnGtAn pb-Zn-AG ore DepoSit,huAnGShAn City

The Xianwangtan Pb-Zn-Ag ore deposit, Huangshan City lies in the middle part of the Huangshan concave rift folding cluster, the meeting place of the Yangzhanling anteklise and the Xiuning rift depression, on the northeastern end of the Jiangnan orogen （Jiangnan uplift） between the Yangtze landmass and South China landmass. The outcropped rocks in the area include Proterozoic Huansha Formation sandy slate, slate, Niuwu Formation phyllitic sandstone and slate, Sinian Xiuning Formation fine sandstone and siltstone. Faults are dominant ore-control structures with fractured zone F9 being the biggest faulting structure. Diabase vein is the material source for this deposit to form. The major ore body, Pb-Zn-As ore body I, is hosted in breccia of faulting zone F9, vein-like, occurring in conformity with fault F9. Ore minerals are mainly galena, sphalerite and natural silver. This deposit belongs to middle- and low-temperature hydrothermal filling replacement deposit in origin. Ore-prospecting direction is the depth of the deposit and surrounding area with similar geological conditions to the surveyed area.