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XIA Dong, LUO Zhaohua, WANG Junliang, PENG Yuxuan, ZHU Zhixin, YANG Yi. 2020. Fluid Inclusion Characteristics and Metallogenic Model of the Aqishan Pb-Zn (Cu) Deposit, Shanshan County, Xinjiang. Northwestern Geology, 53(1): 76-90. doi: 10.19751/j.cnki.61-1149/p.2020.01.008
Citation: XIA Dong, LUO Zhaohua, WANG Junliang, PENG Yuxuan, ZHU Zhixin, YANG Yi. 2020. Fluid Inclusion Characteristics and Metallogenic Model of the Aqishan Pb-Zn (Cu) Deposit, Shanshan County, Xinjiang. Northwestern Geology, 53(1): 76-90. doi: 10.19751/j.cnki.61-1149/p.2020.01.008
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Fluid Inclusion Characteristics and Metallogenic Model of the Aqishan Pb-Zn (Cu) Deposit, Shanshan County, Xinjiang

  • 1. School of Gesciences and Resources, China University of Geosciences, Beijing 100083, China;

  • 2. Xinjiang Institute of Geological Survey, Urumqi 830000, Xinjiang, China;

  • 3. Xinjiang Institute of Mineral Experient, Urumqi 830000, Xinjiang, China

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Received Date:  15 July 2019
Revised Date:  08 August 2019
    Abstract
  • The Aqishan Pb-Zn (Cu) deposit is a newly discovered large-scale Pb-Zn(Cu) deposit in the western section of the Jurassicta metallogenic belt in eastern Tianshan Mountains,with the potential of super-large deposits. Based on the analysis of the geological characteristics of the deposit,the ore minerals (sphalerite,quartz,calcite,garnet) in the main ore-forming stage were tested by fluid inclusion temperature and salinity. The results show that the inclusions are mainly two-phase of gas-liquid; three-phase inclusions containing seed crystals are few. The gas-liquid ratio in gas-liquid two-phase inclusions is 5%~10%,and the uniform temperature is 94.8~440.1°,the salinity is 4.8%~44.32% respectively. Sphalerite is obviously divided into high-temperature sphalerite (331℃) and low-temperature sphalerite (145~181℃). Salinity is mainly distributed in 8~14% and 18~22%.The study of fluid inclusions,combined with the geological and geochemical research of the deposits,shows that The Aqishan Pb-Zn (Cu) deposit mainly exists in the early stage of silicate hydrothermal fluid and in the late stage of carbonate hydrothermal fluid. The interacted part of the two is the main ore-forming stage, with the characteristics of low-temperature and medium salinity in the ore stage,and thus summarizing the ore-forming model of the deposit.
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