Earth Science Frontiers ›› 2024, Vol. 31 ›› Issue (1): 267-283.DOI: 10.13745/j.esf.sf.2023.11.39

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Research advances on the geochronology of Carlin-type gold deposits in the Youjiang Basin, southwestern China

GAO Wei1(), HU Ruizhong1,4,*(), LI Qiuli2,4, LIU Jianzhong3, LI Xianhua2,4   

  1. 1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
    2. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    3. Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang 550018, China
    4. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2023-07-25 Revised:2023-10-13 Online:2024-01-25 Published:2024-01-25

Abstract:

The Youjiang Basin hosts the world's second largest Carlin-type gold province after Nevada, USA. However, due partly to the uncertainty of their mineralization age the geodynamic setting of the Carlin-type gold deposits remains unclear. During the past forty years significant efforts have been made to accurately constrain the timing of these gold deposits, ranging from the early dating methods (with low reliability) such as quartz fission track and fluid inclusion Rb-Sr isochron dating, to the midterm dissolution-based bulk analyses of mineral separates such as sulfide Re-Os, to the latest in-situ precise U-Pb dating of hydrothermal U-bearing minerals including rutile, monazite, and apatite. It has now been clearly considered that there existed two episodes of Carlin-type gold mineralization in the Youjiang Basin ca. 215-200 Ma and 155-140 Ma, probably in response, respectively, to the Indosinian post-collisional intracontinental orogeny and the Yanshanian asthenospheric upwelling and lithospheric extension in southern China.

Key words: the Youjiang Basin, Carlin-type gold deposit, mineralization age, Indosinian and Yanshanian episodes of gold mineralization

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