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Global Geology 2012, 15(1) 26-34 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Geochemistry of fluid inclusions from Linglong gold deposit in Shandong��China |
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ZHAO Yongyue1, WANG Li1 and YANG Heting2 |
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1�� College of Earth Sciences��Jilin University��Changchun 130061��China; 2�� College of Materials Science and Engineering��Jilin University��Changchun 130025��China |
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Abstract��
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�棬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�� |
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Keywords��
fluid inclusions
geochemistry
Linglong gold deposit
Shandong
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Received Revised Online: |
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