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Gold Science and Technology ›› 2024, Vol. 32 ›› Issue (1): 1-12.doi: 10.11872/j.issn.1005-2518.2024.01.136

• Mineral Exploration and Resource Evaluation •     Next Articles

Peripheral Electrical Characteristics and Its Prospecting Significance of Wulong Gold Deposit in Eastern Liaoning Peninsula

Xingchun WANG1,2(),Haicheng QIU3,Jianping LI3(),Qingquan ZHI1,2,Hua LI4,Junjie WU1,2,Xiaohong DENG1,2,Qiong WU1,2   

  1. 1.Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, Hebei, China
    2.State Research Center of Modern Geological Exploration Engineering Technology, Langfang 065000, Hebei, China
    3.Liaoning Wulong Gold Mining Co. , Ltd. , Dandong 118012, Liaoning, China
    4.Qinghai Provincial Geological Survey Bureau, Xining 810000, Qinghai, China
  • Received:2023-10-04 Revised:2023-12-26 Online:2024-02-29 Published:2024-03-22
  • Contact: Jianping LI E-mail:cat94@126.com;664244146@qq.com

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Abstract:

The Wulong gold mine in Liaodong has been mined for more than 80 years，the reserve of mining resources has seriously declined，and the problem of insufficient reserve resources is particularly prominent.It is urgent to identify the deep and peripheral mineral resources in the mining area.Through the measurement of transient electromagnetic method（TEM）in the northwest and southeast sides of the v163 ore vein and the south side of the No.100 fault，the corresponding 2D and 3D geoelectric models were constructed，and the charac-teristics of low resistance anomalies in the mining area were analyzed.Combined with previous achievements，the genetic types of gold deposits and the next exploration direction were inferred.The results show that the low resistance area on the P0 section in the northwest direction of the v163 ore vein is caused by a group of fine-grained diorite veins，including the northwest section of the v163 ore vein，which is highly likely to belong to the quartz vein type mineralization.The low resistance area in the 3D geoelectric model on the south side of the No.100 fault corresponds to the Dagudingzi gold deposit.The deep scale of the low resistance area on the north side increases，and the anomaly is not closed，indicating that the deep part of the north side of the area has a good prospecting prospects and it is worthy of further work.In the 3D geoelectric model in the southeast direction of the v163 ore vein，the low resistance anomaly value is significantly lower in magnitude than the former two，suggesting that it is caused by an alteration zone.After the engineering verification hole，it is revealed that there are multiple layers of discontinuous silicified altered rocks vertically in this area，with a maximum thickness of 41 m.The alteration types include silicification，sericitization，chloritization，and varying degrees of pyrite mineralization.This research indicates that there are not only quartz vein type gold orebodies in the Wulong gold deposit，but also altered rock type gold，which may be the main direction of the next pros-pecting in the mining area.

Key words: transient electromagnetic method（TEM）, quartz vein type gold deposit, alteration-type gold deposit, peripheral prospecting, v163 ore vein, Wulong gold deposit

CLC Number: 

  • P631

Fig.1

Geological map of Wulong gold mine area"

Table 1

Statistical of electrical parameters of rock（ore） in mining area"

岩性电阻率/（Ω·m）样品数量/件资料来源

片麻状二云母

花岗岩

4 471~14 9556杜琴（2018）
含矿石英脉岩165~2 5058杜琴（2018）
石英脉岩1 000~100 0007杜琴（2018）
花岗斑岩4 500~13 0006杜琴（2018）
细粒闪长岩3 100~11 0906辽宁有色勘查总院（2003）
花岗闪长岩11 378~83 47018辽宁有色勘查总院（2003）

Fig.2

Geological map of the Wulong gold deposit and TEM line layout（modified after Yu et al.，2021）"

Fig.3

Resistivity inversion section of P0 profile"

Fig.4

Resistivity inversion section and 3D geoelectric model for LOOP1 and LOOP2"

Fig.5

Resistivity inversion section of P53 line and P56 line"

Fig.6

3D geoelectric model on the south side of No.100 fault"

Table 2

ZK319A-1 core catalog summary table"

序号深度区间/m岩心名称岩心描述备注
①0~13.2残坡积粉土、粉砂含少量黏土及碎石
②13.2~180.3黑云母二长花岗岩、黑云闪长岩、辉绿岩互层黑云母二长花岗岩呈灰白色，细粒花岗岩，块状构造；黑云闪长岩呈黑色，细粒结构，块状构造；辉绿岩呈黑色，辉绿结构，块状构造；灰白色，细粒花岗岩结构，块状构造；局部有硅化、绢云母化
③180.3~187.5硅化蚀变岩灰白色，粒状结构，块状构造，矿物成分主要为硅质，蚀变强烈，见有硅化、绢云母化、绿泥石化和伟晶岩化，节理发育，岩心破碎蚀变
④187.5~214.9黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造；
⑤214.9~217.2硅化蚀变岩同③蚀变
⑥217.2~277.5黑云母二长花岗岩及构造破碎带灰白色，中—细粒花岗岩，块状构造；破碎带岩心破碎，见有蚀变
⑦277.5~303.5硅化蚀变岩同⑤，出现少量黄铁矿化蚀变
⑧303.5~306.9构造破碎带硅化强烈，原岩为黑云母二长花岗岩，见有绢云母化和绿泥石化
⑨306.9~356.1黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造
⑩356.1~369.4黑云闪长岩黑色，细粒结构，块状构造
?369.4~379.5硅化蚀变岩同⑦，局部见黄铁矿化蚀变
?379.5~403.6黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造
?403.6~413.7硅化蚀变岩同?，局部见黄铁矿化蚀变
?413.7~428.0黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造
?428.0~433.7硅化蚀变岩同?，局部见黄铁矿化蚀变
?433.7~443.1闪长岩灰绿色，中—细粒变晶结构，块状构造
?443.1~474.3硅化蚀变岩同?，底部黄铁矿化发育蚀变
?474.3~486.3闪长岩、黑云闪长岩分别呈灰绿色和黑绿色，细粒结构，块状构造
?486.3~499.4硅化蚀变岩同?，黄铁矿化发育蚀变
?499.4~562.5黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造
21562.5~603.9硅化蚀变岩同?，黄铁矿化发育蚀变
22603.9~609.3黑云母二长花岗岩灰白色，中—细粒花岗岩，块状构造
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