安徽宣城茶亭铜金矿区外围找矿潜力分析  

Analysis of mineral prospecting potential in the periphery of Chating copper-gold mining area in Xuancheng City of Anhui Province

作　　者：洪大军 宋世明[2] 张旭 陈科夫[1] 刘宏 HONG Dajun;SONG Shiming;ZHANG Xu;CHEN Kefu;LIU Hong(Geological Exploration Technology Institute of Anhui Province, Anhui Hefei 230001, China;Nanjing Geological Survey Center of China Geological Survey, Jiangsu Nanjing 210016, China)

机构地区：[1]安徽省勘查技术院,安徽合肥230001 [2]中国地质调查局南京地质调查中心,江苏南京210016

出　　处：《中国地质调查》2022年第3期23-31,共9页Geological Survey of China

基　　金：安徽省自然资源厅“安徽省宣城市麻姑山—荞麦山铜(钼)多金属矿成矿条件与找矿靶区优选(编号:2013-g-20)”;中国地质调查局“长江中下游成矿带深部矿勘查方法技术评价(编号:12120114037901)”项目联合资助。

摘　　要：安徽宣城茶亭铜金矿是皖东南首次发现的大型斑岩型铜金矿。近年来在该地区实施的一系列物探工作以及验证物探异常获得新的找矿成果,区内铜多金属矿与岩浆活动十分密切,中酸性侵入岩能引起地磁异常,碳酸盐岩能引起重力异常,黄铁矿、黄铜矿能引起可控制音频大地电磁(controlled source audio magnetotelluric method,CSAMT)低阻异常,研究发现茶亭斑岩型铜金矿物探异常特征为低磁、高重力场、CSAMT低阻。根据上述综合找矿信息,在茶亭斑岩型铜金矿外围深部找矿中发现了新的含金隐爆角砾岩体以及铅锌矿体,指明了茶亭外围找矿方向,为进一步的找矿突破提供了思路。The Chating copper-gold deposit in Xuancheng City is the first discovered porphyry type copper-gold deposit in Southeastern Anhui Province.In recent years,some new achievements are got by a series of geophysical survey and verification works of geophysical anomalies.The copper polymetallic deposits in the area are closely related to magmatic activity.The geomagnetic anomalies are caused by intermediate-acid intrusive rocks,and gravity anomalies are caused by carbonate rocks.Besides,the low resistivity anomalies in CSAMT are caused by pyrite and chalcopyrite.The Chating copper-gold deposit are characterized by low magnetic,high gravity and low resistivity in CSAMT.The new gold-bearing cryptoexplosive breccia and lead-zinc ore bodies have been found in the deep prospecting in the periphery of Chating copper-gold mining area,based on the above comprehensive prospecting informations,which indicates the prospecting direction and provide further prospecting breakthrough idea in the periphery of Chating copper-gold mining area.

关 键 词：铜金矿 隐爆角砾岩筒 磁法 重力 CSAMT 找矿潜力 宣城茶亭 

分 类 号：P631[天文地球—地质矿产勘探] P618[天文地球—地质学]