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| Keywords | |
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fluid inclusion |
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ore genesis |
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copper-polymetallic deposit |
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Moshishan |
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Heilongjiang |
| Authors | |
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YANG Yan-Chen-1 |
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GUO Jia-1 |
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ZHANG Lan-Ling-2 |
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WANG Ke-Yong-1 |
| PubMed | |
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Article by Yang, Y. C. 1 |
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Article by Guo, J. 1 |
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Article by Zhang, L. L. 2 |
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Article by Wang, K. Y. 1 |
Study on fluid inclusions in Moshishan copper-polymetallic deposit of Heilongjiang
YANG Yan-Chen-1, GUO Jia-1, ZHANG Lan-Ling-2, WANG Ke-Yong-1
1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. College of Engineering Technology of Heilongjiang Province��Harbin 150081��China
Moshishan copper--polymetallic deposit is located in Moshishan--Hongxing metallogenetic district belonging to Xiaoxinganling--Zhangguangcailing ore concentrated zone. The fluid inclusions in quartz mineral of orebearing quartz vein from major ore body were examined by means of petrography��microtemperature measurement and Raman microprobe of single fluid inclusion vapor-liquid phase. The study shows that there exist three types of fluid inclusions��including two types of carbon dioxide-bearing inclusions (type ��)��and a vapor-liquid twophase inclusions (type ��). The homogenization temperature is 205. 9 �� �� 297. 6 �棬salinity is 2. 2 �� 9. 2 wt% (NaCl)��and the ore-forming fluid is a carbon dioxide-bearing NaCl--H2O--CO2 system with medium salinity. Immiscibility (boiling) of ore-forming fluid is an important factor of Cu--Mo polymetallic mineralization enrichment. The metallogenic pressure of ore deposit is 75 �� 110 MPa and the mineralization depth is 2. 5 �� 3. 7 km��which reflects the mineralization was formed in medium depth. The deposit belongs to middle temperature hydrothermal deposit�� and the mineralization was related to the subduction of ancient Pacific Ocean Plate in Late Jurassic.