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Global Geology 2015, 18(3) 164-173 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Study on fluid inclusions of Shawang gold deposit in Haiyang of Shandong |
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CHEN Changxin��WANG Li��CHEN Yang and SUN Liwei |
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College of Earth Sciences��Jilin University��Changchun 130061��China |
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Abstract��
Shawang gold deposit is a large gold deposit��located in the NE margin of the Jiaolai basin��which is part of Muping- Jimo metallogenic belt in eastern Shandong�� It was controlled by the footwall of Guocheng fault zone and secondary faults zone�� Aiming to the fluid inclusions in Shawang gold deposit��the authors carry on petrographic��microthermometric and ��aman spectroscopic component analyses�� The results show that there are four- type fluid inclusions: single phase inclusions��gas- liquid two- phase inclusions��pure CO2 inclusions and three- phase inclusions containing CO2 �� Ore- forming fluid is characterized by low salinity (4.3%-12.6% NaCl�� eqv)��low density (0.64-0.97 g/cm3 )��medium- high temperature (280��-320��)��metallogenic pressure with 81-94 MPa��and metallogenic depth as 7.39- 7.98 km�� The fluid experienced immiscibility of CO2 - NaCl-H2O system during the metallogenic process�� In combination with the analysis of hydrogen and oxygen isotopes in fluid inclusions��it is determined that the Shawang gold deposit is mesothermal vein- type��with participation of mantle- derived water and magmatic water for its genesis�� |
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Keywords��
fluid inclusions
ore-forming fluid
Shawang gold deposit
Haiyang
Shandong
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Received Revised Online: |
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