白银厂铜矿床地质特征

白银厂铜矿床位于北祁连加里东地槽东部火山岩系内,区内火山岩发育。矿床受区域构造控制,矿体呈扁豆状、透镜状、似层状、脉状等,产状与地层大体一致。矿石构造以块状、浸染状和脉状为主,结构以自形、半自形粒状结构和交代结构为主。近矿围岩蚀变以绢云母化、硅化、黄铁矿化为主;远矿围岩蚀变以铁白云岩化、碳酸盐化、绿泥石化为主。矿石的矿物成分主要为黄铁矿、黄铜矿,其次是闪锌矿、方铅矿以及少量磁铁矿等。

The Geological Characteristics of Baiyinchang Copper Deposit

The copper deposit in Baiyinchang Orefield located in the east of Beiqilian Caledonian fold.The lava in this area is developmental.The deposit is under the control of the area structures.The ore-bodies take the forms of hyacinth beans,lens and bags,veins and layers and extend in accord with the strike of the strata.The main ore structures are block structure,veinlet structure,and strip structure,and the ore textures include mainly automorphic-hypautomorphic granular texture and inclusive texture.The close alteration mainly include： sericitization、silicate、pyritization.But incomparable alteration include： pearl spar、carbonatation、chloritization.The main ore minerals as pyrite,chalcopyrite,followed by sphalerite,galena,as well as a small amount of magnetite,and so on.