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Gold Science and Technology ›› 2020, Vol. 28 ›› Issue (5): 701-711.doi: 10.11872/j.issn.1005-2518.2020.05.027

• Mineral Exploration and Resource Evaluation • Previous Articles     Next Articles

Potential Analysis of Gold Resources in Qianchuiliu Mining Area, Northeast Margin of Jiaolai Basin,Shandong Province

Liuan DUAN1(),Youfeng WEI2,Xiongjun CHEN1,Xiaomeng HAN1,Yuncheng GUO1   

  1. 1.Yantai Geological Survey Center of Coastal Zone,China Geological Survey,Yantai 264004,Shandong,China
    2.School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,Hubei,China
  • Received:2019-12-30 Revised:2020-06-14 Online:2020-10-31 Published:2020-11-05

Abstract:

The Qianchuiliu mining area of Muping in Yantai City is located in the northeast margin of Jiaolai Basin,Shandong Province.It shows good location and metallogenic condition with Liaoshang gold deposit (super large) on the west and Xilaokou gold deposit(large) and Xijingkou gold deposit(medium) on the east.However,there has been no breakthrough in ore prospecting in this area through geological work for many years,and the prospecting has fallen into confusion.In this paper,base on the introduction of the geological background of the Qianchuiliu mining area,we sorted out and summarized the geological,geophysical and geochemical data obtained in this area.Then based on the characteristics of the surrounding typical gold deposits and the main orebodies in each deposit,we summarized the gold metallogenic regularity and the metallogenic characteristics in this area.According to above studies,the reasons why the prospecting effect is not obvious in this area in the past are found and discussed.It is considered that there are some problems,including the selection of geophysical methods,excessive engineering spacing,too much attention to the industrial grade of surface samples,and lack of systematic understanding of mineralization.Furthermore,two possible prospecting ideas were proposed:Firstly,it is considered that the four gold mining areas,e.g.,Liaoshang,Qianchuiliu,Xilaokou and Xijingkou are controlled by the same NE-trending large fault zone from west to east,the inclination angle gradually changed from steep to gradual;Secondly,the above four mining areas are controlled by a large fault zone in the east-west direction,the inclination angle gradually changed from steep to gentle from north to south.Gold orebodies exists in the large fracture zone,the shallow orebody is characterized by steep dip,scattered and small scale.Whereas,the deep orebody mainly exists in the fault fracture zone from steep to slow,distinguished by large scale and stability.Notably,there is a large ore-free interval between shallow and deep ore bodies.Further analysis shows that in the Qianchuiliu mining area between Liaoshang and Xilaokou,although there are no industrial orebodies on the surface or shallow surface,a large-scale fracture zone has been found,which should be brought into the same metallogenic system as the surrounding gold deposits.No matter which model controls the ore deposits,in NE or near EW direction,it is inferred that there are a series of gold orebodies in Qianchuiliu mining area,which are relatively gently dipping and inclined to SE or S,and exist in the place from steep to gentle in the fracture zone.Therefore,the gold resource potential is between the Liaoshang and Xilaokou gold deposit,and it is concluded that there is a great prospecting potential.

Key words: metallogenic regularity, resource potential, prospecting idea, Qianchuiliu mining area, northeast margin of Jiaolai Basin

CLC Number: 

  • P618.51

Fig.1

Geological sketch map of Qianchuiliu and surrounding gold mining area"

Table 1

Synthetic geochemical anomaly in Qianchuiliu mining area[15]"

异常编号异常名称异常特征组合所在位置
主元素其他元素
Ht-1上垛玉夼WPb-Cu-Zn-Au-As-Mo-Bi上垛玉夼村东南1 km处
Ht-2前垂柳AuAg-Zn-Pb-Cu-As-Bi-Mo-W-Sb前垂柳村东北200 m处
Ht-3辽上水库北AuAg-Zn-As-Pb-Cu-W-Mo-Bi辽上水库北100 m处
Ht-4辽上水库东AuAs-Ag-Cu-W-Bi-Mo-Sb辽上水库东100 m处
Ht-5垂柳南PbAg-Zn-Au-As-W-Mo-Bi-Sb前垂柳村南1.2 km处
Ht-6凤凰崖北AuAg-Zn-Pb-Cu-W-As-Bi-Mo-Sb西凤凰崖村北1.7 km处

Fig.2

Ht-3 synthetic geochemical anomaly in Qianchuiliu mining area"

Fig.3

Ht-4 synthetic geochemical anomaly in Qianchuiliu mining area"

Table 2

Characteristics of gold deposits around Qianchuiliu mining area"

矿区名称矿体情况矿床规模平均品位赋存标高
辽上7个矿化蚀变带,56个金矿体,其中主次要矿体各5个金69 003 kg;伴生银5 437 kg;伴生硫纯硫量84.47×104 t

金:3.33×10-6;银:2.64×10-6

硫:4.10%

-518~-952 m
西涝口168个矿体,其中Ⅲ-26为主矿体金31 094 kg;伴生银3 957 kg;纯硫量604 973 t金:2.53×10-6
西井口19个金矿体、6个铅矿体、6个锌矿体金11 004 kg;共生铅304 t,共生锌621 t;伴生银19 393 kg;纯硫量460 862 t金:2.73×10-6;铅:0.73%;锌:1.37%;银:5.62×10-6;硫:12.15%-127~-634 m
沙旺—土堆215个矿体累计探明金大于20 000 kg;伴生纯硫量231 636 t金:4.72×10-6;硫:4.31%

Fig.4

Section line diagram of Ⅲ ore body in Liaoshang gold deposit (modified after reference[7])"

Fig.5

Schematic diagram of borehole exploration line profile in Qianchuiliu mining area"

Fig.6

Schematic diagram of the exploration line profile of No.18 in Xilaokou mining area"

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