短偏移距瞬变电磁法在崤山矿集区的应用实现重大找矿突破  

A major breakthrough in ore prospecting achieved by the application of Short Offset Transient Electromagnetic Method in Xiaoshan ore concentration area

作　　者：金旺林 王艳红 李士祥 胡丽芳 JIN Wanglin;WANG Yanhong;LI Shixiang;HU Lifang(Henan Non-ferrous Metal Mineral Exploration Engineering Technology Research Center,Zhengzhou 540016,China;The First Geological Team of Henan Provincial Non-ferrous Metals Geological and Mineral Resources Bureau,Zhengzhou 540016,China)

机构地区：[1]河南省有色金属矿产探测工程技术研究中心,郑州540016 [2]河南省有色金属地质矿产局第一地质大队,郑州540016

出　　处：《有色金属（矿山部分）》2022年第2期110-115,共6页NONFERROUS METALS(Mining Section）

基　　金：河南省有色金属地质矿产局科技创新项目(YSDK2018-02)。

摘　　要：小秦岭、熊耳山和崤山地区处于同一大地构造位置,具有极为相似的成矿地质条件和区域地质演化背景,其中小秦岭和熊耳山地区已取得较好的找矿效果,而崤山地区却一直未取得重大找矿突破。如何在崤山地区的深部与覆盖区实现找矿突破,是崤山地质研究的一个重要课题。由于崤山地区覆盖层较厚,采用常规的物探方法,找矿效果不理想。通过开展短偏移距瞬变电磁法试验研究,在崤山地区中深部发现了有利的低阻构造单元,再结合地质资料,实现了重大找矿突破。短偏移距瞬变电磁测深试验中,通过研究短偏移距装置参数及技术指标特点,并结合已知地质物化探资料,对观测数据进行处理与反演,借助已知钻孔资料进行层位标定,从而总结短偏移距瞬变电磁测深技术方法规律;然后根据已知剖面上的研究规律,结合地质资料分析,在未知区开展试验,总结出一套适合崤山薄脉型矿床的找矿新方法。该方法突破了传统物探方法的局限性,在推广应用到整个崤山地区的地质找矿之后,实现了区域找矿重大突破。For the same geotectonics,metallogenic geological conditions and regional geological evolution background of Xiaoqinling,Xiong′er Mountain and Xiaoshan are pretty similar,at the same time,the first two areas have achieved good prospecting results while the last one have no significant results.How to realize ore-prospecting breakthrough in the depth and overburden area of Xiaoshan is an important subject in geological research.Due to the thick overburden in Xiaoshan area,the conventional geophysical prospecting method is not ideal.Through the experimental study of the Short Offset Transient Electromagnetic Method(SOTEM),favorable low-resistivity structural units were found in the middle and deep parts of Xiaoshan area.Combined with the geological data,an important breakthrough in ore prospecting was achieved.Through the Short Offset Transient Electromagnetic Test on the typical profiles in the Xiaoshan ore concentration area to get the device parameters and technical specifications and characteristics,known geological and geochemical data,processed an inversed observer data,and horizon calibration under the help of drilling,the Short Offset Transient Electromagnetic Method have been summarized.Then,according to the research law of the known section,combined with the analysis of geological data,the experiment was carried out in the unknown area,and a set of new prospecting methods suitable for the thin vein type ore deposit in Xiaoshan were conclused.This method breaks through the limitation of the traditional geophysical prospecting method,and it has achieved a major breakthrough in regional prospecting after being applied to the whole Xiaoshan area.

关 键 词：崤山矿集区 短偏移距瞬变电磁法 隐伏岩体 高阻异常 薄脉型矿床 构造反演 重大找矿突破 

分 类 号：P62[天文地球—地质矿产勘探]