| Citation: |
FENG Weihua, SHE Pengtao, PENG Hailian, WANG Mingzhi. 2021. Study on the Ore-forming Fluid Characteristics and Process in Xiaoqinling Gold Deposit, Shaanxi Province. Northwestern Geology, 54(2): 149-156. doi: 10.19751/j.cnki.61-1149/p.2021.02.012
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Study on the Ore-forming Fluid Characteristics and Process in Xiaoqinling Gold Deposit, Shaanxi Province
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Abstract
This papers ystematically studied the distribution characteristics and ore-forming stages of gold orebody in Xiaoqinling area of Shaanxi Province through microthermometry and Laser Raman spectroscopy.The physicochemical characteristics and ore-forming model of Xiaoqinling gold deposit were analyzed.Based on the previous analysis,the authors hold that the compound antiform of Dayueping-Jinluoban is the main ore-controlling structural framework.The distribution of orebody is controlled by the secondary embrittlement ductile faults derived from the compound antiform.The main ore-bearing structure is along the east-west fault zoneparallel to the fold hinge.The ore-forming process is divided into four main stages.It is in the mineralization stage (phase Ⅲ) that formed gold-bearing polymetallic sulfide deposits.The ore-forming fluidis of low salinity and rich in CO2, with the metallogenic condition being medium temperature and medium pressure.The decrease of pressure by the expansion of mineralization space and the mixing of meteoric precipitation caused gold deposit precipitation. -
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References
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FENG Weihua, SHE Pengtao, PENG Hailian, WANG Mingzhi. 2021. Study on the Ore-forming Fluid Characteristics and Process in Xiaoqinling Gold Deposit, Shaanxi Province. Northwestern Geology, 54(2): 149-156. doi: 10.19751/j.cnki.61-1149/p.2021.02.012
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