内蒙古某铜多金属矿深部勘查的磁法与激电法联合解译研究  

Joint Interpretation of Magnetic and Induced Polarization Methods for Deep Exploration of a Copper-polymetallic Deposit in Inner Mongolia

作　　者：占文锋 王可祥 孙进 ZHAN Wenfeng;WANG Kexiang;SUN Jin(School of Architectural and Surveying&Mapping Engineering,Beijing Polytechnic College,Beijing 100042,China;Inner Mongolia Weilasituo Mining Co.,Ltd.,Chifeng 025350,China;Huashun Xinneng Technology(Beijing)Co.,Ltd.,Beijing 102218,China)

机构地区：[1]北京工业技术学院建筑与测绘工程学院,北京100042 [2]内蒙古维拉斯托矿业有限公司,内蒙古赤峰025350 [3]华舜鑫能科技(北京)有限公司,北京102218

出　　处：《金属矿山》2025年第3期128-137,共10页Metal Mine

基　　金：企业科技创新基金项目(KJ1952301);校科技计划项目(编号:BGY2023KY-10)。

摘　　要：内蒙古巴彦乌拉矿区及外围化探揭露异常区面积大,金属元素种类多,深部找矿潜力大。由于测区内第四系覆盖严重,黄铁矿化、铅锌矿化和闪锌矿化岩体深部主要赋存于古元古界锡林郭勒杂岩群片麻岩中,在地表和垂向上表现出不同的物性特征,利用磁法与激电法联合勘探解译,可以弥补各自不足,更加准确地推断矿体赋存情况,做到以面定点、以点测深,以寻求该区深部找矿突破。在测区磁法和激电扫面解译的基础上,选取重点区域激电测深剖面进行了反演,研究表明:①通过对测区ΔT磁异常进行化极、上下延拓处理后,揭露的3处磁异常与化探异常位置一致,推断其延伸超过200 m;②激电测深解译显示电阻率最小的黄铁矿化构造岩对应深度大于200 m,极化率最小的铅锌矿化石英闪长岩对应深度约150 m;③在靶区施工验证钻孔,所在地表出露岩体中黄铁矿化发育,钻孔中所见黑云母斜长片麻岩内黄铁矿化较强,黄铁矿化呈细脉状、薄层状,局部可见粒状毒砂矿化,埋藏最深的闪锌矿超过400 m。上述研究反映出,利用电、磁联合解译能取得良好的找矿效果,对测区下一步找矿靶区圈定及钻孔布设具有重要指导意义,在相似地区有一定的应用前景。The Bayan Ula mining area and its surrounding areas in Inner Mongolia reveal large areas of anomalies in geochemical exploration,with a wide variety of metal elements and great potential for deep prospecting.Due to the heavy coverage of the Quaternary system in the survey area,the deep parts of pyritization,lead-zinc mineralization,and sphalerite mineralization rock bodies mainly occur in the gneiss of the Paleoproterozoic Xilin Gol Complex,showing different physical properties on the surface and vertically.Using magnetic and induced polarization methods for joint exploration and interpretation can compensate for their respective deficiencies,more accurately infer the occurrence of orebodies,and achieve point-by-point mapping and depth measurement so as to seek breakthroughs in deep prospecting in the area.Based on magnetic and induced polarization scanning interpretation in the survey area,selected key areas were inverted using induced polarization sounding profiles.The study results showed that:①After processing theΔT magnetic anomalies in the survey area with polarization and up-down continuation,three magnetic anomalies revealed were consistent with the locations of geochemical anomalies,indicating that their extension exceeded 200 m;②Induced polarization sounding interpretation showed that the pyritization structure rock with the lowest resistivity corresponds to a depth greater than 200 m,while the lead-zinc mineralization quartz diorite with the lowest polarization rate corresponds to a depth of about 150 m;③Construction verification drilling was carried out in the target area,where pyritization developed in the exposed rock bodies on the surface.The induced polarization sounding showed strong pyritization in the biotite plagioclase gneiss seen in the drilling,with pyritization appearing as fine veinlets and thin layers,locally visible as granular arsenopyrite mineralization,and with the deepest buried sphalerite exceeding 400 m.The above study results reflected that using combined electrical and ma

关 键 词：铜多金属矿 隐覆区 磁法 激电测深 延拓 解译 找矿预测 

分 类 号：P612[天文地球—矿床学]