Global Geology 2012, 15(1) 26-34 DOI:     ISSN: 1673-9736 CN: 22-1371/P

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fluid inclusions
Linglong gold deposit
ZHAO Yongyue1
WANG Li1 and YANG Heting2
Article by ZHAO Yongyue1
Article by WANG Li1 and YANG Heting2

Geochemistry of fluid inclusions from Linglong gold deposit in Shandong,China

ZHAO Yongyue1, WANG Li1 and YANG Heting2

1. College of Earth Sciences,Jilin University,Changchun 130061,China; 2. College of Materials Science and Engineering,Jilin University,Changchun 130025,China


By means of microscopy and laser Raman spectroscopy,the authors studied the fluid inclusions in petrography. The results show that there exist three-phase CO2-bearing and two-phase aqueous inclusions in gold ore; the fluid of NaCl--H2O--CO2 system went through immiscibility in ore-forming process. Ore-forming fluids were of low salinity ( 0. 82%--5. 40% NaCleqv) ,low density ( 0. 54-0. 93 g /cm3 ) ; mineralization temperature were concentrated in 320℃--340℃,with ore-forming pressure in 62-126 MPa and mineralization depth in 6. 34-9. 35 km. The fluid inclusions in quartz are generally characterized by a small amount of CO2 and N2 . Combined with recent results of the isotopic analysis for fluid inclusions and dating data,it was indicated that the main ore-forming fluids derived mainly from source of mantle-derived fluids with a small amount of magmatic fluid and meteoric water. The genetic type was mesothermal gold deposits involved by mantle-derived fluids.

Keywords fluid inclusions   geochemistry   Linglong gold deposit   Shandong  
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