Journal of Jilin University(Earth Science Edition) ›› 2024, Vol. 54 ›› Issue (4): 1177-1198.doi: 10.13278/j.cnki.jjuese.20230057

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General Characteristics and Research Progresses in Metallogenesis of the Continental Sandstone-Hosted Cu-Pb-Zn Deposits in the Southwest Tianshan

Zhao Lutong 1, Wang Jingbin 2, Wang Yuwang 3   

  1. 1. Sino-Zijin Resources Co., Ltd., Beijing 100012, China
    2. Zijin Mining Group Co., Ltd., Xiamen 361000, Fujian, China
    3. Beijing Institute of Geology for Mineral Resources Co., Ltd., Beijing 100012, China
  • Received:2023-03-14 Online:2024-07-26 Published:2024-07-26
  • Supported by:
    the National “305” Scientific Research Program (2015BAB05B04-03) and the Industry Fund of the Ministry of Land and Resources (201511016-02)

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1

Abstract: A great number of sediment-hosted Cu-Pb-Zn deposits, including the ultra-large Uragen Pb-Zn deposit and the large Sareke Cu deposit, are found in the Meso-Cenozoic sedimentary basins (Kuzigongsu basin, Wulu-Wuqia basin, Keping basin and Kuqa basin) within the southwest Tianshan orogeny. These basins compose a significant base mental metallogenic belt in NW China. Numerous studies suggest that those deposits mainly include three types: The conglomerate-hosted Cu deposits, the sandstone-hosted Pb-Zn deposits, and the sandstone-hosted Cu deposits. Based on the main geological characteristics of each deposit type, this paper summarizes the research progress concerning the ore-forming ages, nature and source of the ore-forming fluids, and material source (metals and S). Results indicate that the conglomerate-hosted Cu deposits were formed at the end of the Early Cretaceous during the basin tectonic transition. The sandstone-hosted Pb-Zn and Cu deposits were formed in the Late Miocene and were both closely related to large retrograde thrust tectonics. The ore-forming fluid of conglomerate-hosted Cu deposits dominated by organic fluids, the sandstone-hosted Pb-Zn deposits by basin brine, and sandstone-hosted Cu deposits by a mixture of organic fluids and basin brine, with atmospheric precipitation contributing to the ore-forming process. The orogenic zone materials and the sedimentary sulfate are the main sources of metals and S for all deposit types in this region. This paper suggests enhancing research on the ore-forming age of sandstone-hosted Cu deposits, mineralization of the sandstone-hosted Pb-Zn deposits, and comparative study with newly discovered marine sandstone-hosted Cu deposits.

Key words: southwest Tianshan orogenic belt, conglomerate-hosted deposit, sandstone-hosted deposits, Cu-Pb-Zn deposits, mineralization, ore-forming age

CLC Number: 

  • P611
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