综合电法在隐伏矿产勘查中的应用研究  

The application study of integrated electrical method to the prospecting for concealed ore deposits

作　　者：李建华[1,2,3] 林品荣 杜炳锐[1,2,3] 齐方帅 丁卫忠[1,2,3] LI Jianhua;LIN Pinrong;DU Bingrui;QI Fangshuai;DING Weizhong(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;Laboratory of Geophysical Electromagnetic Probing Technologies,Ministry of Land and Resources,Langfang 065000,China;National Center for Modern Geological Exploration Engineering and Technology Research,Langfang 065000,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,廊坊065000 [2]自然资源部地球物理电磁法探测技术重点实验室,廊坊065000 [3]国家现代地质勘查工程技术研究中心,廊坊065000

出　　处：《物探化探计算技术》2022年第4期468-476,共9页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：深地资源勘查开采重点专项(2018YFC0603201);基础性公益性地质调查专项(DD20211340);基本科研业务费项目(AS2021Y01)。

摘　　要：覆盖区与深部找矿是金属矿勘查的重要任务。以“已知区试验研究-建立找矿标志-未知区找矿预测”的研究思路,采用大功率供电的激发极化法和可控源音频大地电磁测深,在云南西邑铅锌矿区开展了隐伏矿找矿应用研究。通过在典型已知区的试验研究,验证了大功率综合电法在该区寻找隐伏铅锌矿的可行性,结合成矿地质条件,建立了地球物理电性找矿标志,并提出适合于该区的“大功率激电扫面+测深方法空间定位”的有效方法技术组合。基于建立的标志,对在矿区及外围采用综合电法取得的电性特征进行分析解释,提出异常区3处,圈定预测靶区1处。试验应用成果为矿区下一步勘查找矿工作奠定了基础,同时该研究对其他类似地区寻找隐伏矿床具有一定的参考价值。It is an important task of metal mineral exploration in overburden area and deep prospecting.Based on the research idea of'experimental research in known areas-establishment of prospecting indicators-prospecting prediction in unknown areas',the authors conducted the prospecting application study to the prospecting for concealed ore deposits of high-power integrated electrical method in Xiyi area,Yunnan.The integrated electrical method including induced polarization method and controlled source audio frequency magnetotelluric sounding.In the experimental study of known area,combined with the known distribution of ore bodies,the feasibility of high-power comprehensive electrical method was verified in finding concealed lead-zinc deposits in this area.Combined with the metallogenic geological conditions,the geophysical electrical prospecting indicators are established,and an effective method and technology combination of'high power IP scanning+sounding method spatial positioning'suitable for this area was proposed.Based on the established signs,we analyzed and explained the electrical characteristics obtained by comprehensive electrical method in and around the mining area,proposed 3 abnormal areas and delineated 1 prediction target area.The application results lay a foundation for the next exploration and prospecting work in the mining area.At the same time,the study has a certain reference value for looking for concealed deposits in other similar areas.

关 键 词：综合电法 电性特征分析 隐伏矿 找矿预测 

分 类 号：P631.3[天文地球—地质矿产勘探]