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| FLUID INCLUSION IN THE HULALIN GOLD DEPOSIT, INNER MONGOLIA |
| WANG Xiao-yong1, JIA Wei-guang2, WANG Xian-zhong1, ZHAO Bing-xin1, ZHOU Dian-yu1, SHEN ming-guo1 |
1. No. 3 Gold Geological Party, CAPF, Harbin 150086, China;
2. Shenyang Institute of Geology and Mineral Resources, Shenyang 110034, China |
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Abstract On the basis of the results from the inclusion petrofacies, micro-thermometry and laser Raman spectrographic analysis, the ore-forming fluid characters are systematically studied, and the genesis of the Hulalin gold deposit is discussed. The results show that these inclusions consist of mainly gas-liquid two-phase, with minor CO2-bearing three-phase, daughter mineral-bearing three-phase and pure CO2 types. The homogenization temperature of ore-forming fluids ranges from 320 to 360℃, with salinity (NaCl) of 19.2%-21.8%, and density of 0.73-0.90 g/cm3. The estimated mineralizing pressure is between 92.1 and 129.1 MPa, with mineralizing depth of 3.07-4.3 km. The gas composition of ore-forming fluids is mainly H2O, followed by CO2, CH4 and N2, with less C6H6, C2H6 and C3H8, belonging to H2O-CO2-NaCl system. The ore-forming fluids are unmixed, mainly from the deep magmas and maybe joined with mantle components. The gold is transferred mainly in the form of gold-chlorine complex. The geological and geochemical features of the deposit are similar to those of cryptoexplosion breccia gold deposits. So it can be assigned to the cryptoexplosion breccia type.
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Received: 06 May 2010
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2010, Vol. 19 
