Summary of technology for a comprehensive geophysical exploration of gold mine in North China Craton  

作　　者：Qingyun DI Guoqiang XUE Da LEI Qingdong ZENG Changmin FU Zhiguo AN 

机构地区：[1]CAS Engineering Laboratory for Deep Resources Equipment and Technology,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [2]Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [3]Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [4]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing,100049,China [5]Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing,100029,China

出　　处：《Science China Earth Sciences》2021年第9期1524-1536,共13页中国科学（地球科学英文版）

基　　金：supported by the National Key Research and Development Program“Deep Earth Resources Exploration and Exploitation”(Grant No.2016YFC0600101);the Beijing Science and Technology Program“Deep Earth Exploration Technology Research and Development”Special Funding(Grant No.Z181100005718001);the National Natural Science Foundation Key Project(Grant No.42030106)。

摘　　要：The North China Craton is the oldest continental block,and has suffered from large-scale lithospheric thinning and destruction,which in turn led to gold deposits in northern China.The decratonic gold deposits in the North China Craton became the most important gold deposits in China,and geophysical methods are key means to detect and discover gold deposits there.In this paper,based on the geological and petrophysical characteristics of the North China Craton,the geological model of the decratonic gold deposits is transformed into a geophysical model.At present,two methods of geophysical exploration of decratonic gold deposits are in use:rapid and efficient exploration on the scale of the ore concentration area,and large depth exploration on the scale of the deposit area.In detail,the airborne electromagnetic,magnetic and gravity methods are used to detect the shallow(1,500 m)anomaly area on the scale of the ore concentration area.Through the ground-controlled source electromagnetic and ground magnetotelluric methods,explorations for targets at significant depth(5,000 m)are carried out in the mining area.Then,taking the Liaodong ore concentration area as an example,geophysical methods are used to discover two prospecting areas around the Jianshanzi Fault in the Qingchengzi ore concentration area,Baiyun-Xiaotongjiapuzi deep prospecting area,and Qingchengzi deep prospecting area.Next,three prospecting areas are delineated around the Jixingou Fault in the Wulong mining area,Wulong deep prospecting area,Weishagou deep prospecting area,and Chang’an deep prospecting area.The anomalies in the ore concentration area and mining area are revealed by means of three-dimensional exploration methods,thereby providing technical support for the exploration of metal minerals such as decratonic gold deposits.

关 键 词：Decratonic gold deposits in the North China Craton Liaodong area Integrated geophysics Mining area scale Deposit area scale 

分 类 号：P618.51[天文地球—矿床学]