河南省汝阳县靳村——王坪一带铅锌矿矿床成因及找矿模型分析

Genesis of Lead——Zinc Deposits in Wangcun Area, Jin Village, Ruyang County, Henan Province And prospecting model analysis

河南省汝阳县靳村——王坪一带铅锌成矿区位于华北地块南缘熊耳——外方山古大陆基底隆起带东部,在泰山庙燕山期花岗岩体东北部熊耳群鸡蛋坪组中基性-酸性火山岩地层分布区沿近东西向、北东向断裂中分布众多铅锌矿床(点)。鸡蛋坪组地层Pb、Zn丰度值高于维氏值2~6倍不等;成矿区内各组断裂中北东向、近东西向断裂带内Pb、Zn、Cu、Ag明显高于其他方向断裂;成矿区内各时期中酸性岩体中Pb含量平均高于维氏值3倍,部分铅锌矿直接赋存于石英二长岩体、石英闪长岩中;矿体围岩蚀变强烈,硅化、绿泥石化、碳酸盐化与区内铅锌矿成矿关系密切,不同类型的围岩蚀变叠加对区内铅锌矿成矿有利;综合分析区内铅锌矿地质特征认为区内铅锌矿含矿热液主要来源于岩浆热液,在岩浆热液上侵过程中自围岩(鸡蛋坪组地层)中萃取淋滤了一定的成矿物质形成该区铅锌等多金属含矿热液,含矿热液沿北东向、近东西向断裂运移过程中在成矿有利部位沉淀形成铅锌矿体。

henan ruyang lead-zinc metallogenic province jin village - Wang Ping area is located in the southern margin of north China massif bear ear - foreign mountain ancient eastern continental basement uplift belt, in the mount tai temple north of yanshan period granite TiDong bear ear group of basic and acid volcanic rock formation in egg ping group area along nearly east-west, north east to fracture distribution in many deposits （points）. Egg ping group formation Pb, zinc abundance value is higher than the vickers 2 - 6 times each; Metallogenic zone north east to each fracture, nearly east- west fault zone in Pb, zinc, Cu, Ag, significantly higher than the other direction of fracture; Pb content in the metallogenic zone in different periods of acidic rock mass average 3 times higher than the value of vickers, part of the lead-zinc deposit occurs in quartz directly two long, quartz diorite rock mass; Ore body wall rock alteration, silicification and chloritization, carbonatization close to lead-zinc mineralization in the area, and different types of wall rock alteration superimposed good for lead-zinc mineralization in the area; Comprehensive analysis of regional lead-zinc mine geological characteristics that lead and zinc ore hydrothermal comes mainly from magmatic hydrothermal, in the process of magmatic hydrothermal assault on the surrounding rock ping formation （eggs） leaching extracting some ore-forming materials form the lead-zinc polymetallic ore, such as hydrothermal, ore-bearing hydrothermal migration along the north east, near east-west fracture pb-zn orebody in the favourable area for precipitation in the process.