湖南郴州铁石垅铅锌矿床地质及硫、铅同位素特征与深部找矿预测  

Geology,sulfur and lead isotope characteristics and deep ore exploration prediction of Tieshilong lead-zinc deposit in Chenzhou,Hunan Province

作　　者：朱文兵 文成雄 郭爱民 关百成 肖荣 张贻舟 杜云 蔡毅 陈志超 ZHU Wenbing;WEN Chengxiong;GUO Aiming;GUAN Baicheng;XIAO Rong;ZHANG Yizhou;DU Yun;CAI Yi;CHEN Zhichao(Geological Survey of Hunan Province,Changsha 410116,Hunan,China;Chenzhou Qiaoxing Mining Industry Limited Liability Company,Chenzhou 423000,Hunan,China)

机构地区：[1]湖南省地质调查所,湖南长沙410116 [2]郴州市桥兴矿业有限责任公司,湖南郴州423000

出　　处：《矿产勘查》2023年第9期1584-1594,共11页Mineral Exploration

基　　金：湖南省地质院基金项目“湘南东坡矿田铁石垅多金属矿深部控矿机制与成矿模式研究(HNGSTP202307)”;湖南省两权价款地质勘查项目“湖南省郴州市铁石垅矿区边深部铅锌矿普查(201203087)”联合资助。

摘　　要：铁石垅铅锌矿床是湘南地区具有代表性的老矿山之一。为确定其成矿物质来源,指导深部找矿,在研究矿床地质特征的基础上,进行了矿石硫、铅同位素分析与研究。数据显示,矿床中方铅矿的δ34S值基本呈“塔式分布”,δ34SCDT值变化介于-1.48‰~-5.05‰,平均-3.86‰,表明铁石垅铅锌矿床混有一定地层中的有机硫,具有地壳深部硫的来源特征,且越往深部,岩浆硫的来源特征越明显。206Pb/204Pb值介于18.509~18.619,平均18.588;207Pb/204Pb值介于15.697~15.762,平均15.735;208Pb/204Pb值介于38.754~38.982,平均38.891。矿石铅同位素μ值变化范围小,相对集中且较大,显示铅源主要为上地壳物质,可能混染了少量造山带铅,成矿物质来源与岩浆作用关系密切。成矿作用主要发生在燕山期,预测铁石垅铅锌矿床深部存在隐伏岩体和钨、锡矿体。The Tieshilong lead-zinc deposit is the one of the representative old mines in southern Hunan Province.In order to determine the source of ore-forming materials and guide deep prospecting,the ore sulfur and lead isotope analysis and research were carried out.based on the study of the geological characteristics of the deposit.Experimental data show that theδ34S value of galena in the deposit showed“tower distribution”,theδ34SCDT values varied from-1.48‰to-5.05‰,with an average of-3.86‰.Experiments show that Tieshilong lead-zinc deposit is mixed with organic sulfur in certain strata.It has the characteristics of sulfur source in deep crust,and the deeper,the source characteristics of magmatic sulfur are the more obvious.The 206Pb/204Pb value is between 18.509 and 18.619,with an average of 18.588;the 207Pb/204Pb value is between 15.697 and 15.762,with an average of 15.735;the 208Pb/204Pb value is between 38.754 and 38.982,with an average of 38.891.The variation range ofμvalue of Pb isotope in ore is small,relatively concentrated and large.It shows that the Pb source is mainly upper crustal material,which may be contaminated with a small amount of orogenic Pb.The source of oreforming materials is closely related to magmatism.The mineralization mainly occurred during the Yanshan period,and it is predicted that there are hidden rock masses and tungsten and tin deposits in the deep part of the Tieshilong lead-zinc deposit.

关 键 词：硫铅同位素 铅锌矿床 深部找矿 铁石垅 郴州 

分 类 号：P597[天文地球—地球化学] P618.4[天文地球—地质学]