新疆若羌县维宝铅锌矿床地质特征及矿床成因浅析

Brief Analysis for Geological Features and Ore Deposit Origin of Weibao Lead-Zinc Deposit in Ruoqiang County,Xinjiang

维宝矿区属塔里木-华北板块柴达木微板块之祁漫塔格古生代复合沟弧带,成矿区带属于秦祁昆成矿域-昆仑成矿省-东昆仑F e-Pb-Zn-Cu-Co-A u-W-Sn-石棉-盐类成矿带-祁漫塔格W-Sn-Pb-Zn-F e-Cu-多金属矿带。容矿地层为蓟县系狼牙山组(Jx l),含矿岩性为条带状绿帘石、透辉石矽卡岩、少量为矽卡岩化大理岩。矿体主要受地层控制,形态多呈层状、透镜状和脉状。近矿围岩蚀变主要有矽卡岩化、绿泥石化、大理岩化和纤闪石化等。矿石矿物以方铅矿、闪锌矿、黄铜、黄铁矿为主,其次为褐铁矿、孔雀石、铜蓝等。矿石主要为半自形—他形粒状变晶结构,浸染状构造为主,局部见块状构造。矿床成因类型为沉积-岩浆气液叠加层控矿床。

The Weibao mining area,located at the Qimantage Paleozoic Era compound trench-arc belt in the Qaidam micro tectonic plate of Tarimu-North China tectonic plate,belongs to the east Kunlun Mountains Fe-Pb-Zn-Cu-Co-Au-W-Sn-asbestos-salts mineralization belt-Qimantage W-Sn-Pb-Zn-Fe-Cu multi-metalliferous ore belt,the Qin-Qi-Kun mountains mineralization territory-Kunlun mountains mineralization province.The mineral estate level is attached to Langya group（Jxl）,Jixian system and ore rock mainly is the stripped epidote,diopside skarns,a few the skarnized marble.Ore bodies mainly are controlled by stratigraphy and shaped often into stratiform,lens and veins.The wall rock alteration of near-ore has mainly been skarnized,chloritization,marmarosis,filamented and so on.Ore minerals are galena,sphalerite,brass,yellow iron ore primarily,next,limonite,green copper ore,copper mica and so on.The ore is mainly with half idiomorphic-xenomorphic-granular metacryst texture and contaminated structure,partially with block structure.Genetic type of the ore deposit is classified into the deposition-magmatic gas fluid superimposition and stratabouned.