J4 ›› 2010, Vol. 40 ›› Issue (5): 1053-1060.

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Characteristics of the Fluid Inclusion of Banmiaozi Gold Deposit, Jilin Province and Their Geological Significance

WANG Jian-xin1|SUN Feng-yue1|ZANG Xing-yun2|FU Yang1|SUN Zhen-ming1|DING Pei-chao1   

  1. 1.College of Earth Sciences| Jilin University|Changchun 130061, China;
    2.Geological Survey of Jilin Province|Changchun 130061, China
  • Received:2009-12-30 Online:2010-09-26 Published:2010-09-26

Abstract:

The Banmiaozi gold deposit is a medium-sized one structurally controlled by the  ductile shear zone in the western Jiapigou auriferous metallogenic belt. The main mineralization type of the deposit is gold-bearing quartz vein. Fluid inclusions in quartz can be classified into aqueous two-phase and CO2-bearing three-phase types. The homogenization temperatures for the CO2-bearing three-phase inclusions range from 250 ℃ to 326 ℃, and the salinities range from 4.51% to 7.14%; the homogenization temperatures for the aqueous two-phase range from 129 ℃ to 229 ℃, and the salinities range from 5.25% to 7.01%. According to the results of inclusions temperature measurement, the metallogenic pressure is estimated mainly between 34.7-109.6 MPa and the formation depth of deposit at about 6-7 km. Considering the metallogenic setting in this area, the deposit should be prospecting for its moderate-deep erosion.

Key words: gold-bearing quartz vein, fluid inclusion, gold deposits, Banmiaozi,Jilin Province

CLC Number: 

  • P618.51
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