物化探方法在青海某多金属矿区的找矿效果  

THE EFFECTS OF APPLYING INTEGRATED GEOPHYSICAL AND GEOCHEMICAL TECHNIQUES TO ORE-PROSPECTING WORK IN A CERTAIN POLYMETALLIC ORE DISTRICT IN QINGHAI

作　　者：柳建新[1,2] 曹创华[1,2] 童孝忠[1,2] 郭荣文[1,2] 邓小康[1,2] 甘佳雄 刘文劼[4] 

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]有色资源与地质灾害探查湖南省重点实验室,湖南长沙410083 [3]湖南省岳阳市地震局,湖南岳阳414000 [4]中南大学土木工程学院,湖南长沙410075

出　　处：《物探与化探》2012年第5期705-711,共7页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金(41174103);教育部博士点基金(20110162130008);国家科技支撑计划项目(2011BAB04B08);中国地质调查局科研项目(资[2011]03-01-64);有色资源与地质灾害探查湖南省重点实验室项目(2010TP4012-6)

摘　　要：根据青海多龙恰柔勘查区已有的地质信息,以含辉钼矿化、黄铜矿化的印支期、燕山期花岗岩为主要研究对象,用地球化学土壤(岩屑)测量、地球物理双频激电扫面综合圈定了3个有意义的成矿远景区,用激电测深与EH4大地电磁测深初步圈定了2个大的异常带的空间大致分布:均是走向以NNW向为主、倾向以SWW向为主、倾角较陡的大型异常带,总结了此矿区地质—地球物理—地球化学成矿模型,最后在推断出的异常部位布设钻孔并见矿。这次工作表明:因地制宜地结合各种物探方法,利用地质填图资料,综合全局考虑化探异常,扬长避短,发挥各自优势,在西部特殊景观区寻找金属矿科研与实践中具有重要意义。On the basis of geological exploration information obtained in the Duolongqiarou exploration area of Qinghai Province and with the molybdenitized and chalcopyritized Indosinian and Yanshanisn granites as the main study objects, the authors conducted geo- chemical soil （debris） survey and geophysical dual-frequency IP sweeping, delineated three valuable metallogenic prospective areas, and then employed IP sounding and EH4 magnetotelluric sounding to preliminarily delineate two anomaly belts, which are mainly NNW- striking and SWW-dipping large-size anomaly belts. A geological-geophysical-geochemical metallogenic model was formulated for this ore district, and drill holes were deployed over the inferred anomaly positions, which intersected ore bodies. The results show that the combination of geophysical methods and geological mapping information and the integrated consideration of the geochemical anomalies can avoid anomalies resulting from carbon matter, which is of great significance for the exploration work in the west special landscapeareas.

关 键 词：西部特殊景观区 多金属矿勘查 成矿模型 成矿预测 

分 类 号：P631[天文地球—地质矿产勘探] P632[天文地球—地质学]