甘肃省西和县元滩子金铅锌矿地质特征及找矿标志

Geologicai Features and Prospecting Indicator of Wangtiangou Gold Deposit in Tianshui City of Gansu Province

元滩子金铅锌矿位于西成铅锌矿田西部,行政区划属甘肃省西和县赵武乡所辖。矿体赋存部位为中泥盆统西汉水组生物碎屑灰岩、中-厚层粉晶灰岩和钙质千枚岩的接触部位,有较稳定的层位。含矿岩性为:①石英岩,岩石主要石英组成,其次为碳酸盐矿物和白云母,金属矿物呈浸染状—星点状分布其中;②石英方解石脉:岩石主要由方解石组成,其次为石英。文章总结了成矿地质背景、矿化类型、矿床成因,并提出了找矿标志。

Yuantanzi gold lead-zinc ore deposit is located in the west of Xicheng lead-zinc ore field.Its administrative division is under the jurisdiction of Zhaowu Township,Xihe County,Gansu Province.The ore bodies mainly occur in the contact area of thick silty limestone,bioclastic limestone and calcite phyllite in the West Hanshui Formation of Middle Devonian,with relatively stable horizon.The ore-bearing lithology is as follows:①Quartzite,which is mainly composed of quartz,followed by carbonate minerals and Muscovite.Metallic minerals are disseminated to star-point distribution in it.②Quartz calcite veins:rocks are mainly composed of calcite,followed by quartz.This paper summarizes the geological background,mineralization type and genesis of ore deposits,and puts forward the prospecting criteria.