ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    陈靖,郭文波,王宏宇,等. 综合电磁法在凤太二里河铅锌矿深部的找矿效果分析[J]. 西北地质,2024,57(1):196−206. doi: 10.12401/j.nwg.2023177
    引用本文: 陈靖,郭文波,王宏宇,等. 综合电磁法在凤太二里河铅锌矿深部的找矿效果分析[J]. 西北地质,2024,57(1):196−206. doi: 10.12401/j.nwg.2023177
    CHEN Jing,GUO Wenbo,WANG Hongyu,et al. Analysis on Prospecting Effect of Integrated Electromagnetic Methods in Deep Prospecting of Fengtai Erlihe Lead−Zinc Deposit[J]. Northwestern Geology,2024,57(1):196−206. doi: 10.12401/j.nwg.2023177
    Citation: CHEN Jing,GUO Wenbo,WANG Hongyu,et al. Analysis on Prospecting Effect of Integrated Electromagnetic Methods in Deep Prospecting of Fengtai Erlihe Lead−Zinc Deposit[J]. Northwestern Geology,2024,57(1):196−206. doi: 10.12401/j.nwg.2023177

    综合电磁法在凤太二里河铅锌矿深部的找矿效果分析

    Analysis on Prospecting Effect of Integrated Electromagnetic Methods in Deep Prospecting of Fengtai Erlihe Lead−Zinc Deposit

    • 摘要: 二里河铅锌矿是凤太矿集区中具有代表性的重要铅锌矿床之一,近些年找矿方向转向已知矿体深部及外围。根据二里河地区地质、地球物理特征,结合多年在凤太地区的综合地球物理找矿工作,分析了回线源瞬变电磁法、电性源短偏移距瞬变电磁法及广域电磁法在二里河地区的实际应用效果,对3种方法的特点和适用性进行总结,认为:回线源瞬变电磁法、电性源短偏移距瞬变电磁法及广域电磁法在该地区深部找矿具有可行性;回线源瞬变电磁法对于圈定矿体水平位置具有较好的效果,电性源短偏移距瞬变电磁法对低阻异常较为敏感,广域电磁法分辨率较高,同时探测深度可达到2500 m。此外针对二里河矿区的找矿工作,提出物探工作建议:采用以广域电磁法和电性源短偏移距瞬变电磁法为首选的综合电磁探测方法,同时应尽可能采用长剖面和面积性物探工作。

       

      Abstract: Erlihe lead-zinc deposit is one of the representative large-middle lead-zinc deposits in Fengtai orefield. In recent years, the prospecting direction has shifted to the deep and periphery of the known ore body. According to the geological and geophysical characteristics of Erlihe area and combined with the comprehensive prospecting work in Fengtai area for many years, this paper analyzes the practical application effects of loop source transient electromagnetic method (TEM), electrical source short-offset transient electromagnetic method(SOTEM) and wide field electromagnetic method in Erlihe area. It is concluded that TEM, SOTEM and wide field electromagnetic method are feasible in deep prospecting for this area; TEM has a good effect on delineating the horizontal position of the ore body. SOTEM is more sensitive to low resistivity anomaly, the resolution of wide field electromagnetic method is high, and the detection depth can reach 2500 meters; According to the characteristics of Erlihe lead-zinc deposit, it is suggested to adopt the comprehensive electromagnetic detection method with wide field electromagnetic method and SOTEM as the first choice, and use long sections and area geophysical exploration as far as possible.

       

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