辽宁二道沟金矿床黄铁矿热电性特征及深部找矿预测  

Thermoelectric Characteristics of Pyrite and Deep Prospecting Prediction in Erdaogou Gold Deposit,Liaoning Province

作　　者：温佳伟 史鹏亮 刘彦兵 张静[2] 屈海浪 李元申 胡博心 缪广 WEN Jiawei;SHI Pengliang;LIU Yanbing;ZHANG Jing;QU Hailang;LI Yuanshen;HU Boxin;MIAO Guang(Beijing Jinyou Geological Exploration Co.,Ltd.,Beijing 100011,China;School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China)

机构地区：[1]北京金有地质勘查有限责任公司,北京100011 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《黄金科学技术》2020年第6期812-824,共13页Gold Science and Technology

基　　金：中国黄金集团有限公司地质科研项目“内蒙古金厂沟梁—辽宁二道沟金矿田成矿系统研究及找矿预测”(编号:WKY201701)资助。

摘　　要：辽宁二道沟金矿为赋存在中生代陆相火山岩中的岩浆热液型矿床,矿脉严格受构造控制。为了预测1号和3号脉深部的延伸规模、成矿环境和矿化情况,通过系统采集分析450^-305 m大部分中段的黄铁矿样品,对成矿温度、剥蚀率、黄铁矿热电性、热电性参数(XNP)均值以及P型黄铁矿不同标高的出现率和离散度进行了研究。结果表明:1号和3号脉成矿温度集中在130~280℃之间,属于中低温热液矿床;1号和3号脉剥蚀率等值线向深部分别为低值区和高值区,且均未封闭,热电导型分别以P型、P-N型和P-N型、N-P型为主,在-305 m中段深部XNP均值分别为83.33(矿脉上部)和-8(矿脉中部),在-215 m中段深部P型黄铁矿出现率分别增加和减少,综合说明-305 m中段分别处于1号脉的中上部和3号脉的中部偏下位置,1号脉深部延伸较大,3号脉深部仍有部分延伸;在1号脉-215 m中段深部金的成矿环境逐渐稳定且矿化很好,在3号脉-260 m中段深部金的成矿环境由动荡转为稳定且矿化较好。Erdaogou gold deposit is a magmatic-hydrothermal deposit hosted in continental volcanic rocks in Liaoning Province,its orebodies are strictly controlled by structures.Predecessors have done a lot of research on the genesis of Erdaogou gold deposit in Liaoning,and carried out a lot of exploration and prospecting work in the mining area,and found some new veins,but the deep prospecting prediction of some mined veins are relatively weak.After years of mining and production,the mine urgently needs to increase resource reserves to maintain development.At present,the control length of No.1 and No.3 veins are about 680 m,while the control length of No.5-1 vein on the west has reached 1600 m,and the deep part of No.1 and No.3 veins may still have a certain scale extension.At present,except for the deep prospecting prediction by using the thermoelectricity of pyrite at the middle section of the 250 m to-215 m depth of the No.3 vein,the systematic research on the No.1 and No.3 veins have not been carried out.In order to predict the extension,metallogenic environment and mineralization of No.1 and No.3 veins,this paper systematically studied the thermoelectric characteristics of pyrite,ore-forming temperature,veins denudation rate,XNP mean and the occurrence rate of different elevations of P-type pyrite of the samples at the 450 m to-305 m depth.The results show that the ore-forming temperatures of No.1 and No.3 veins are 130~280℃,which belong to medium-low temperature hydrothermal deposits.The average denudation rates of No.1 vein is 45.89%,the contour of denudation rate becomes a low value area to the deep and is not closed,the thermoelectric conductive types is mainly P type,P-N type and mean value of XNP at the-305 m depth is 83.33(upper part of vein),the occurrence rate of P-type pyrite at the middle section of-215 m increases.The average denudation rates of No.3 vein is 50%.The contour of denudation rate becomes a high value area and is not completely closed,the thermoelectric conductive types is mainly P-N type and

关 键 词：黄铁矿 热电性特征 剥蚀率 离散度 成矿温度 P型黄铁矿出现率 

分 类 号：P618.51[天文地球—矿床学]