湖北宜昌红桂香铜矿区综合物探异常特征及找矿潜力分析  

Comprehensive geophysical anomaly features and prospecting potential of Hongguixiang copper deposit in Yichang,Hubei

作　　者：吕登 张国亮 郑斐 王强 陈冰寒 伍姝珊 杨朋 周舟 向萌 何钦 Lv Deng;Zhang Guoliang;Zheng Fei;Wang Qiang;Chen Binghan;Wu Shushan;Yang Peng;Zhou Zhou;Xiang Meng;He Qin(The Seventh Geological Brigade of Hubei Geological Bureau,Yichang 443100,China;Natural Resources and Planning Bureau of Yiling District,Yichang City,Yichang 443100,China)

机构地区：[1]湖北省地质局第七地质大队,湖北宜昌443100 [2]宜昌市夷陵区自然资源和规划局,湖北宜昌443100

出　　处：《资源环境与工程》2025年第1期29-35,共7页Resources Environment & Engineering

基　　金：湖北省宜昌市夷陵区红桂香矿区铜矿普查([2022]6号)。

摘　　要：位于鄂西黄陵穹窿南部的红桂香铜矿属矽卡岩型矿床,矿体产于古元古界黄凉河组大理岩与斜长片麻岩接触带。在深入调查红桂香铜矿区地质特征的基础上,使用高精度磁法、激电中梯、激电测深等物探方法,获取地表和深部物探异常信息,推测深部矿化有利部位并进行钻探验证。结果表明,研究区磁场值整体呈北高南低、东高西低的分布特征,其中负磁异常埋深较浅,正磁异常规模及埋深较大;区内视极化率异常下限为4.5%,视极化率最高达7.5%,高极化异常区视电阻率相对较低,呈现低阻高极化特征;平面上激电异常呈条带状展布,以NE向为主,所圈定的异常区中J2与地表矿化蚀变带吻合较好。针对J2异常区进行综合剖面测量及激电测深,识别出该剖面深部具有矿化有利区,并进行了钻探验证,钻探结果显示矿体位置与激电异常位置吻合。本次研究证明综合物探方法在红桂香矿区找矿勘查中具有有效性,也说明该地区深部具有一定的找矿潜力。The Hongguixiang copper deposit,located in the southern part of the Huangling dome in western Hubei,is a skarn-type deposit.The ore body occurs in the contact zone between marble and plagioclase gneiss of the Paleoproterozoic Huanglianghe Formation.Based on the investigation of geological characteristics of Hongguixiang copper deposit,geophysical methods such as high-precision magnetic method,IP intermediate gradient and IP sounding were used to obtain surface and deep geophysical anomaly information,and the favorable parts of deep mineralization were speculated and verified by drilling.The results show that the magnetic field values in the study area are generally high in the north and low in the south,and high in the east and low in the west.The depth of negative magnetic anomaly is shallow,and the scale and depth of positive magnetic anomaly are large.The lower limit of the apparent polarizability anomaly is 4.5%,and the apparent polarizability is up to 7.5%.The apparent resistivity in the high polarization anomaly area is relatively low,showing the characteristics of low resistance and high polarization.The IP anomalies on the plane are distributed in strips,mainly in the NE direction,and J2 anomaly in the delineated anomaly area is in good agreement with the visible mineralized alteration zone on the surface.The comprehensive profile measurement and IP sounding were carried out for the J2 anomaly area,and the favorable mineralization area in the deep part of the profile was identified and verified by drilling.The drilling results showed that the location of the ore body was consistent with the location of the IP anomaly.This study proves that the comprehensive geophysical prospecting method is effective in the prospecting and exploration of Hongguixiang mining area,and also shows that the deep part of the area has certain prospecting potential.

关 键 词：综合物探方法 物探异常 铜矿 

分 类 号：P631[天文地球—地质矿产勘探]