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Metal Mine ›› 2021, Vol. 50 ›› Issue (07): 153-164.

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Two-stage Mineralization and Its Ore-prospecting Significance in Niubiziliang Cu-Ni Deposit,Qinghai Province

XU Xinwen    DUAN Jianhua    LIU Jiangfeng    SHAO Ji    YANG Xiaohong    XU Jiaqiu   

  1. Bureau of Nuclear Industry and Geology in Qinghai,Xining 810008,China
  • Online:2021-07-15 Published:2021-08-06

Abstract: Niubiziliang Cu-Ni Deposit is the most representative one in the Aerjin orogenic belt in the northwest margin of Qinghai Province,gold mineralization has been discovered in the mining area.By focusing on the characteristics of Cu-Ni deposit and gold mineralization, prospecting potential,prospecting prospect and prospecting direction,it is shown that:①There are two stages of mineralization in the mining area. The early stage is the typical magmatic fusion-penetration type Cu-Ni mineralization controlled by the ultrabasic rocks of the late Devonian ,and the late stage is the typical tectonic alteration type gold mineralization controlled by the east-west faults passing through the rock masses, which are all located in the ultrabasic-basic rock masses of the Devonian; ②The prospecting prospect of copper and nickel deposit in the mining area is large,No.Ⅲ, No.Ⅳ, No.Ⅰ rock mass are all have prospecting potential,the prospecting prospect of the newly discovered gold mineralization is also large;③The subduction section of the southeast of No.III rock mass and the center of the “rock basin” of No.IV and No.I rock mass are the prospecting directions of Cu-Ni deposit in the mining area,the ore body (mineralization) of the existing gold bearing structural alteration belt and the delineated 1∶25 000 geochemical gold comprehensive anomaly are the prospecting directions of gold deposit;④The discovery and study of two-stage mineralization in the area is of great significance.The discovery of gold mineralization provides a new idea for ore prospecting in the area, and also provides a new opportunity for Cu-Ni deposit prospecting in the area.Breakthroughs will be made in the prospecting for gold in the early stage and the prospecting for Cu-Ni ore in the area.

Key words: Cu-Ni depsosit, gold deposit, two-stage mineralization, prospecting prospect, prospecting direction, prospecting significance