Discussion and research on the application of the wide field electromagnetic method to the exploration of metal ore deposits
JIANG Yong-Fang1,2(), LI Fang-Shu1,2, CAO Yuan3, XIA Ling-Yun1,2, ZHANG Ting1,2
1.Hunan Geosun Hi-technology Co.,Ltd.,Changsha 410208,China 2.Hunan Deep Earth Resources Electromagnetic Exploration Engineering Technology Research Center Changsha 410208,China 3.The Second Geological Exploration Institute of Henan Geological Mineral Resources Exploration and Development Bureau,Zhengzhou 451464,China
In the exploration of metal mineral resources,physical exploration is usually difficult but of low cost.Along with the increasing depth of the exploration and serious influence of human disturbance factors in the mining area,the difficulties and cost of physical exploration have been increasing.What's more,due to the limitations of the technical conditions such as the precision and power of the instruments and equipment,the geological effectiveness is getting worse and worse by adopting the general geophysical prospecting method.However,the wide field electromagnetic method has such advantages as great detective depth,high speed,low cost,high resolution and precision,and strong anti-interference capability,and hence can be effectively applied to metal mineral exploration,and this has been proved many times.Therefore,it is advisable to develop new methods,new technologies and new instruments represented by the wide field electromagnetic method in the investigation of deep orebodies as well as crisis mine resources.This paper introduces the basic principles,working methods,application principles and conditions of wide field electromagnetic method,analyzes and studies the case of a gold mine in Henan Province,and expounds the effectiveness of the wide field electromagnetic method in deep exploration of metal deposits.
蒋永芳, 李芳书, 曹渊, 夏灵云, 张婷. 广域电磁法在金属矿勘探中的应用研究和探讨[J]. 物探与化探, 2020, 44(5): 1073-1077.
JIANG Yong-Fang, LI Fang-Shu, CAO Yuan, XIA Ling-Yun, ZHANG Ting. Discussion and research on the application of the wide field electromagnetic method to the exploration of metal ore deposits. Geophysical and Geochemical Exploration, 2020, 44(5): 1073-1077.
Fu S F. Geological characteristics and geochemical gold prospecting achievements in the Shanggong tectonic altered rock type gold deposit[J]. Geophysical and Geochemical Exploration, 2008,32(3):267-269.
[4]
何继善. 可控源音频大地电磁法[M]. 长沙: 中南工业大学出版社, 1990.
[4]
He J S. Control source audio magnetotellurics[M]. Changsha: Central South University Press, 1990.
[5]
汤井田, 何继善. 可控源音频大地电磁法及其应用[M]. 长沙: 中南大学出版社, 2005.
[5]
Tang J T, He J S. The apply of control source audio magnetotellurics[M]. Changsha: Central South University Press, 2005.
Liu C M, Dong T G, He J S. Application of various electromagnetic methods in field exploration of a gold mine[J]. Chinese Journal of Nonferrous Metals, 2013,23(9):2422-2429.
Deng F H, Yang Y, Li D Q. Application of wide area electromagnetic method in concealed gold mine[J]. Journal of Engineering Geophysics, 2013,10(3):357-362.
Yao J M, Zhao T P, Li J, et al. Molybdenite Re-Os age and zircon U-Pb age and Hf isotope geochemistry of the Qiyugou gold system,Henan Province[J]. Acta Petrologica Sinica, 2009,25(2):374-384.
Li S M, Qu L Q, Li X M, et al. Researches on metallogenic geology and mineralization of the Xiong'ershan Structure-Controlled Alteration-Type Gold Deposit [R]. Luoyang:The First Geological Survey Team of The Department of Geology and Mineral Resources of Henan Province, 1989.
Wang J H, Sun W Z, Liu Y W, et al. Forcasting method for gold orebody trending and its application on prospecting in Shanggong gold metallogenic belt,Henan[J]. Mineral Exploration, 2015,6(6):752-758.
Li Y F. The temporal and spatial relationships of Mesozoic era granitoids and molybdenum (gold) deposit mineralization in the Xiong'ershan area[D]. Beijing:China University of Geosciences(Beijing), 2005: 1-125.
Li D Q, Xie W, Chen D X. Three-dimensional modeling for E-Ex wide field electromagnetic methods[J]. The Chinese Journal of Nonferrous Metals, 2013,23(9):2459-2470.
