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四角羊沟铅锌多金属矿床为接触交代型(矽卡岩型)铅锌矿。对四角羊沟铅锌多金属矿床的产状、矿石结构构造、围岩蚀变类型等进行了研究,查明了铅锌矿体主要分布于上石炭系四角羊沟组下段与印支期中酸性花岗闪长岩接触带的透辉石阳起石矽卡岩中,且受控于北东向断裂,矿化体呈似层状。矿床中的矿石矿物主要为方铅矿、闪锌矿,其次为黄铜矿、磁铁矿、镜铁矿。通过对岩体常量元素和稀土元素化学分析,显示矿区西北侧的岩体为高钾钙碱性系列。
The four Yanggou Pb-Zn polymetallic deposits are of the contact metasomatism (skarn type) lead-zinc ore. The occurrence, ore structure and alteration of wall rocks in the Xingougou Pb-Zn polymetallic deposit have been studied. It is found that the Pb-Zn orebodies are mainly distributed in the lower part of the Upper Carboniferous tetragonal Yanggou Formation and the middle-acid In the granodiorite contact zone, diopside-type dipping ceraneous skarn is controlled and controlled by NE-trending faults. The mineralized bodies are layered. The ore minerals in the deposit are mainly galena and sphalerite, followed by chalcopyrite, magnetite and specular iron ore. The chemical analysis of the major elements and rare earth elements in the rock mass shows that the rock mass on the northwest side of the mining area is a high-K calc-alkaline series.