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Characteristics of Fluid Inclusion and Metallogenesis of Gengzhuang Gold Deposit, Shanxi Province

Yao Yuzeng1, Huang Fei1,2,Peng Yandong3,Liu Ning1,Wang Guoguang2,Lü Ancai4   

  1. 1.Geology Department, Northeastern University, Shenyang110004, China;
    2.State Key Laboratory for Mineral Deposit Research(Nanjing University), Nanjing210008, China;
    3.Qinhuangdao Branch, Northeastern University, Qinhuangdao066004, Hebei, China;
    4.Land Reserve Trading Center of Dandong City, Dandong118000, Liaoning, China
  • Received:2012-06-06 Online:2013-01-26 Published:2013-01-26

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Abstract:

The Gengzhuang gold deposit, one of the typical gold polymetallic deposits in northeastern Shanxi Province, occurs in Yanshanian crypto-explosive breccia body. The studies of fluid inclusions indicate that there are five types of inclusions in the quartz of different metellogenic stages, i.e. gas-rich aqueous, H2O-rich aqueous, three-phase CO2-bearing, three-phase daughter-mineral bearing and single-phase aqueous fluid inclusions, and the mineralized fluids are of H2O-CO2-NaCl type. The various types of inclusions formed in ex-metallogenic stage have similar homogeneous temperatures, which indicates that the fluid experienced boiling or aqueous fluid immiscibility. The major metallogenic temperaute is about 170-180 ℃. Combined with isotopic composition and characteristics of gold minerals, we can conclude that the Gengzhuang gold deposit belongs to medium-low hydrothermal gold deposit related to the Yanshanian sub-volcanic activities.

Key words: Gengzhuang gold depsit, fluid inclusion, geochemistry, metallogenesis

CLC Number: 

  • P618.51
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