Wulong gold deposit is the largest quartz vein type gold deposit in the Liaodong gold district.The accumulated proven gold resources are more than 80 tons with an average grade of 5.35×10^-6.The fault structure is well developed and magmatic activity is widespread in the Wulong gold deposit，thus it has good metallogenic potential.Wulong gold deposit has been mined for many years，the gold reserve is reducing steadily，so it is urgent to find deep concealed gold resources.The physical properties of different rocks have been tested and analyzed in Wulong mining area，which show that their resistivities are significantly different，and they have the geophysical prerequisites for prospecting and exploration.EH4 magnetotelluric method is one of the advanced techniques in geophysical exploration system，especially in ore-control structure and metallogenic prediction.In this study，the EH4 magnetotelluric method was used，and sounding data acquisition and two-dimensional inversion calculations were carried out on the east and west sides of Wulong gold deposit.Three EH4 measuring lines of No.100，No.1000，and No.1050 were laid out on the east and west sides of the Wulong gold deposit.The lengths of these EH4 measuring lines are 1 000 m，800 m，and 800 m，respectively.Specifically，the line of No.100 on the east side is mainly used to detect the NNE-trending 100^# fault，while the lines of No.1000 and No.1050 on the west side are mainly used to detect the NNE-trending Jixingou fault.The scalar TM mode was adopted in the EH4 test work in Wulong gold deposit.On the basis of the above work，we first check the original measurement data，then perform computer processing，and finally draw the EH4 2D inversion profile.The EH4 two-dimensional inversion profile has effectively identified the 100^# fault and Jixingou fault on the east and west sides of the Wulong gold deposit with vertical extensions exceeding 1 000 m.In addition，field geological observations and tunnel or drilling projects showed that there is obvious gold mineralization on the surface and shallow parts of these fault zones，which indicated that these fault structures （100^# fault and Jixingou fault） play an important role in the Wulong gold mineralization.The results of this study show that the EH4 magnetotelluric method is effective in the study of ore-controlling structure and metallogenic prediction in the Wulong gold deposit.The eastern，western and deep areas of the Wulong gold deposit have quite good prospecting potential，which points out the direction for the further prospecting.

http://www.goldsci.ac.cn/article/2021/1005-2518/1005-2518-2021-29-5-637.shtml

辽宁五龙黄金矿业有限责任公司为本次EH4测量工作的顺利开展提供了帮助和支持，匿名审稿专家对本文进行了认真审阅和改进，在此一并感谢！