皖南上金山钨钼银矿床地质特征及找矿标志

The geological characteristics and the prospecting marks of Shangjinshan tungsten-molybdenum-silver deposit in the south Anhui province

上金山钨钼银矿床位于安徽省绩溪县境内,是近年来新发现的钨钼多金属矿床之一。矿化赋存于早燕山期上金山岩体与休宁组三段上部地层外接触带中,矿石矿物主要有白钨矿、辉钼矿、辉银矿;矿化分布稳定、层控因素明显,矿床成因类型属层控夕卡岩型钨钼矿床。上金山钨钼银矿床的发现为皖南地区找矿提供了一个新的方向。休宁组三段上部含钙、含锰砂岩-泥质粉砂岩地层与燕山早期中酸性侵入岩接触带,褶皱轴部剥离带和翼部的层间破碎带,具有夕卡岩化、硅化、云英岩化、角岩化、大理岩化蚀变烈强地段,铜、铅、锌、钨、钼、铋、金、银等元素的组合异常及白钨矿重砂异常,是此类矿床的找矿标志。

Shangjinshan tungsten-molybdenum-silver deposit in Jixi county,Anhui province occurs at the outer contact zone between the Early Yanshanian Jinshan intrusion and the upper strata of the third Member of Xiuning formation.It is newly discovered in resent years,stably distributed and obviously stratabound and a stratabound skarn tungsten and molybdenum deposit.The primary ore minerals are scheelite,molybdenite and argentite.Its discovery provides a new prospecting direction in the south Anhui province.The contact zone between mangniferous sandstone-argillaceous siltstone of the Early Yanshanian intermediate-acidic intrusion where the stripped zone along axis and the interformational fractural zone at two limbs of folds and where intense skarnization,siliconization,greisenization,hornfels and marbliation and combination anomly of Cu,Pb,Zn,W,Mo,Bi,Au,Ag and scheelite heavy minereal anomly occur is the prospecting mark.