陕西铧厂沟金矿床AuⅠ矿体黄铁矿热电性特征及深部找矿预测  

Thermoelectric characteristics of pyrite in AuⅠore body and prospecting prediction deep in Huachanggou Gold Deposit,Shaanxi Province

作　　者：胡博心 刘彦兵 韩彪 何键浩 王红亮 徐立为 曹易刚 Hu Boxin;Liu Yanbing;Han Biao;He Jianhao;Wang Hongliang;Xu Liwei;Cao Yigang(Geological Corporation of China Gold Group;Shaanxi Lüeyang Huachanggou Gold Mine Co.,Ltd.)

机构地区：[1]中国黄金集团地质有限公司 [2]陕西略阳铧厂沟金矿有限公司

出　　处：《黄金》2023年第6期79-84,共6页Gold

基　　金：国家自然科学基金重点项目(41730426);中国黄金集团有限公司地质科研项目(WKY201704)。

摘　　要：铧厂沟金矿床矿体赋存在泥盆系三河口群地层内,严格受构造控制。为了指导深部探矿工作,通过系统采集分析铧厂沟金矿床AuⅠ矿体深部黄铁矿样品,对成矿温度、剥蚀率、黄铁矿热电性、热电性参数进行了研究。结果表明:AuⅠ矿体剥蚀率在现有坑道工程内为19%~26%,向深部逐渐升高至30%以上。黄铁矿热电性导型为P型和N型,热电系数为-201.20~901.20μV/℃。分析认为,AuⅠ矿体黄铁矿热电系数在910~830 m中段数值高,其热电性导型主要为P型。在深部钻孔采集的样品分析数据显示:黄铁矿热电系数有所增高,热电性导型具有从P型向P-N型转换的特征,表明现阶段AuⅠ矿体仍处于浅部位置,深部存在较大延伸,推测在64勘探线—112勘探线具有较好的找矿潜力。Huachanggou Gold Deposit is hosted in the strata of the Devonian Sanhekou Group,strictly controlled by tectonics.To guide the deep exploration of the AuⅠore body,the deep pyrite samples of the AuⅠore body in Huachanggou Gold Deposit are systematically collected and analyzed,and the metallogenic temperature,denudation rate,thermoelectricity,and thermoelectric parameters of pyrite are studied.The results show that the denudation rate of AuⅠore body is 19%-26%in the existing tunnels,and gradually increases over more than 30%towards the deep.The thermoelectric conductivity types are mainly P-type and N-type respectively,and the thermoelectric coefficient of pyrite varies from-201.20μV/℃to 901.20μV/℃.The analysis shows that the thermoelectric coefficient of AuⅠore body is high in the middle section of 910-830 m,indicating that the thermoelectric conductivity type is mainly P-type.The sample data collected in deep boreholes show that the thermoelectric coefficient of pyrite has an obvious increasing trend.The thermoelectric conductivity type of pyrite has the characteristics of P-N type conversion from P-type,indicating that the AuⅠore body is still in the shallow position at this stage,and there is a large extension in the deep.It is speculated that Exploration Line 64-112 has good prospecting potential.

关 键 词：黄铁矿 热电性 热电系数 深部找矿 成矿温度 铧厂沟金矿床 

分 类 号：TD11[矿业工程—矿山地质测量]