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物探与化探  2020, Vol. 44 Issue (5): 1053-1058    DOI: 10.11720/wtyht.2020.0200
  广域电磁勘探技术应用专栏 本期目录 | 过刊浏览 | 高级检索 |
多种物探方法在胶西北金矿集中区深部勘探的效果分析
王洪军1(), 田红军2(), 贺春艳1, 刘光迪3
1.山东省物化探勘查院,山东 济南 250109
2.四川中成煤田物探工程院有限公司,四川 成都 610072
3.中南大学 地球科学与信息物理学院,湖南 长沙 410083
An analysis of the effect of multiple geophysical prospecting methods in the deep exploration of the Jiaoxibei (northwest Shandong) gold ore concentration area
WANG Hong-Jun1(), TIAN Hong-Jun2(), HE Chun-Yan1, LIU Guang-Di3
1.Shandong Institute of Geophysical and Chemical Exploration and Exploration,Jinan 250109,China
2.Sichuan Zhongcheng Coal Field Geophysical Engineering Research Institute Co.,Ltd.,Chengdu 610072,China
3.School of Geosciences and Info-Physics,Central South University,Changsha 410083,China
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摘要 

为了建立适合于山东胶西北深部金矿集中区地质—地球物理找矿模型,在已知地质剖面开展多种电磁勘探技术实验,同时优选出适用于胶西北强干扰区金矿集中区深部地球物理勘探方法。对比分析广域电磁法(WFEM)、大地电磁法(MT)、可控源音频大地电磁法(CSAMT)与频谱激电法(SIP)的勘探成果发现:相对于MT而言,广域电磁法具有分辨率高、数据精度高、抗干扰能力强和施工效率高等优势;相对于CSAMT和SIP而言,广域电磁法具有勘探深度大、抗干扰能力强、数据精度高等技术优点。多种方法揭示了剖面线2km内地层和岩体及断裂蚀变带空间分布特征,却未能提供深部内物性参数;反观广域电磁法成果,不仅展示了浅中部电阻率变化规律和特征,同时有效地反映了深部断裂蚀变带的变化特征。结果表明广域电磁法是本次综合物探研究工作中的有效勘探方法,同时为深部成矿预测和模型建立提供了准确的地球物理参数。

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王洪军
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关键词 广域电磁法金矿深部勘探胶西北    
Abstract

In order to establish a geological-geophysical prospecting model suitable for the deep gold deposits in Jiaoxibei region of Shandong,the authors performed a variety of electromagnetic exploration technologies on known geological sections,and selected a deep geophysical exploration method suitable for the concentrated gold deposits in the strong interference zone of Jiaoxibei region.The contrasting and analyzing of the exploration results of wide field electromagnetic method,magnetotelluric method (MT),controlled source audio-frequency magnetotelluric method (CSAMT) and spectrum IP method (SIP) show that,compared with MT,the wide area electromagnetic method has the advantages of high resolution,high data accuracy,strong anti-interference capability and high construction efficiency,and compared with CSAMT and SIP,the wide area electromagnetic method has large exploration depth and strong anti-interference capability,high data accuracy and other technical advantages.Various methods can reveal the spatial distribution characteristics of strata,rock masses and fault alteration zones within 2km of the profile line,but fail to provide deep physical parameters.In contrast,the results of the wide field electromagnetic method not only show the changing rules and characteristics of the shallow central resistivity,but also effectively reflect the changing characteristics of the deep fault alteration zone.The results show that the wide-area electromagnetic method is an effective exploration method in this comprehensive geophysical research,and it also provides accurate geophysical parameters for deep mineralization prediction and model establishment.

Key wordswide field electromagnetic method    gold ore    deep exploration    Jiaoxibei(northwest Shandong)
收稿日期: 2020-04-22      出版日期: 2020-10-26
:  P631.4  
基金资助:山东省重大科技创新工程“深部探测综合地球物理技术”(2018CXGC1601);“深部金矿资源评价理论、方法与预测”(2017CXGC1604)
通讯作者: 田红军
作者简介: 王洪军(1972-),男,山东省齐河县人,高级工程师,主要从事地球物理勘探工作。 Email: hongjun@126.com
引用本文:   
王洪军, 田红军, 贺春艳, 刘光迪. 多种物探方法在胶西北金矿集中区深部勘探的效果分析[J]. 物探与化探, 2020, 44(5): 1053-1058.
WANG Hong-Jun, TIAN Hong-Jun, HE Chun-Yan, LIU Guang-Di. An analysis of the effect of multiple geophysical prospecting methods in the deep exploration of the Jiaoxibei (northwest Shandong) gold ore concentration area. Geophysical and Geochemical Exploration, 2020, 44(5): 1053-1058.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.0200      或      https://www.wutanyuhuatan.com/CN/Y2020/V44/I5/1053
Fig.1  实验区地质图
Fig.2  综合勘探方法剖面线
Fig.3  SIP、重磁、CSAMT、MT法地质综合剖面
Fig.4  山东胶西北GY-01线广域电磁法反演断面(a)及综合解释剖面(b)
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