湖北阳新县丰山铜矿成矿地质条件、成矿规律及深部找矿预测  

Metallogenic geological condition,metallogenic regularity and deep prospecting prediction of Fengshan copper deposit in Yangxin County of Hubei

作　　者：肖德长 华二 戴进玲 张旦 杨朋 孙芳 XIAO Dechang;HUA Er;DAI Jinling;ZHANG Dan;YANG Peng;SUN Fang(Central South Geological Survey Institute of China Metallurgical Geology Bureau,Wuhan 430081,Hubei,China)

机构地区：[1]中国冶金地质总局中南地质调查院,湖北武汉430081

出　　处：《矿产与地质》2023年第3期440-446,共7页Mineral Resources and Geology

基　　金：大冶有色金属有限责任公司勘查项目“丰山铜矿西段勘查”(2021年度);“丰山铜矿7~17线深部补充勘查”(2023年度)资助。

摘　　要：为实现矿区新一轮深部找矿突破,在总结矿床地质特征的基础上,结合中国冶金地质总局中南地质调查院近年来在丰山铜矿完成的地质勘查资料,对矿床成矿地质条件与成矿规律进行综合分析。研究表明:成矿受NWW向断裂、轴向近EW向的复式褶皱、封三洞花岗闪长斑岩岩体及岩体接触带等因素控制,大冶群第六段为成矿有利围岩,矿化及围岩蚀变具有垂向分带和水平分带特征,垂向分带表现为自上而下依次呈现Fe、Cu→Cu、Mo→Mo、Cu矿化,水平分带则表现为自岩体内至岩体外,依次出现斑岩型Cu、Mo矿→矽卡岩型Cu、Mo矿→热液脉型Pb、Zn(Au、Ag)多金属矿。矽卡岩型主矿体主要赋存于构造应力集中的次级褶皱构造轴部顶缘与滑脱(断裂)叠加的接触带地段及其附近,其次赋存于主接触带附近的有利成矿围岩,形成独有的厚大扁豆体矿体和似层状矿体,据此开展深部找矿预测,认为丰山铜矿3~17线深部仍存在矽卡岩型矿体,研究成果可为新一轮找矿突破提供参考。In order to achieve a new round of deep prospecting breakthrough in the mining area,on the basis of summary of the geological characteristics of the deposit,and in combination with the geological exploration data in Fengshan copper deposit completed by Central South Geological Survey Institute of China Metallurgical Geology Bureau in recent years,a comprehensive analysis of the geological condition and metallogenic regularity of the deposit is carried out.The research result has shown that the mineralization is controlled by the factors such as NWW trending faults,axial nearly EW trending compound folds,Fengsandong granite diorite porphyry rock mass,and rock contact zone.The sixth segment of the Daye Group is a favorable wallrock for mineralization,and the mineralization and wallrock alteration have vertical and horizontal zoning characteristics.The vertical zonation shows Fe,Cu→Cu,Mo→Mo,Cu mineralization from the top to bottom.The horizontal zonation is characterized by the occurrence of porphyry type Cu and Mo deposits,followed by skarn type Cu and Mo deposits,and followed by hydrothermal vein type Pb and Zn(Au,Ag)polymetallic deposits from the inside of rock mass to the outside of rock mass.The skarn type main ore body mainly occurs in the contact zone and its vicinity where the top edge of the secondary fold structure axis with concentrated tectonic stress is superimposed with detachment(fault),and secondly in the favorable ore-forming surrounding rock near the main contact zone,forming unique thick and large lenticular ore bodies and layered ore bodies.Based on this,deep exploration prediction is carried out,and it is considered that the skarn type ore body still exists in the deep part of the prospecting lines No.3-17 in Fengshan copper mining area.The research result can provide a reference for a new round of mineral exploration breakthrough.

关 键 词：丰山铜矿 成矿地质条件 成矿规律 深部找矿预测 湖北阳新 

分 类 号：P618.41[天文地球—矿床学]