贵州晴隆丁头山铅锌矿床地质特征及找矿标志

Ore-forming geological conditions and exploration indicators of Dingtoushan Pb-Zn deposit in Qinglong County,Guizhou Province

丁头山铅锌矿床位于贵州省黔西南赫章—威宁—水城铅锌矿成矿带东北部,为黔西南铅锌成矿带的重要组成部分。铅锌矿体赋矿围岩为马平组(Cpn)第二段致密块状含燧石结核灰岩,受花贡断层(F_(3))和丁头山逆断层(F_(1))控制。本文在梳理前人研究成果的基础上,对矿床地质特征及地质条件进行分析,通过对比黔西北地区铅锌矿床成矿特征,确定了马平组第二段+NW向区域构造+围岩蚀变在内的找矿标志,综合激发极化法物探成果,圈定的异常区找矿效果显著,对区域内同类成矿条件地区铅锌矿找矿勘探有一定的借鉴价值。

Dingtoushan lead-zinc deposit is located in the northeast of Hezhang Weining Shuicheng lead-zinc metallogenic belt in Southwest Guizhou Province.It is an important part of Southwest Guizhou lead-zinc metallogenic belt.The host rock of lead-zinc ore body is dense massive chert nodule limestone of Mapping formation(Cpn),which is controlled by Huagong fault(F_(3))and Dingtoushan reverse fault(F_(1)).On the basis of combing the previous research results,this paper analyzes the geological characteristics and geological conditions of the deposit,compares the metallogenic characteristics of lead-zinc deposits in Northwest Guizhou,and determines the prospecting indicators including the second member of Mapping formation+NW trending regional structure+wall rock alteration.Based on the geophysical exploration results of induced polarization method,the prospecting effect of the delineated abnormal area is remarkable,This paper has reference value for lead-zinc ore prospecting and exploration in areas with similar metallogenic conditions in the region.