XIU Xiao-qian1*, SUO Shi-xin1, LIU Hong-xu1,2, MENG Yun-fei1,2
1. Beijing Research Institute of Uranium Geology, Beijing 100029, China;
2. China University of Geosciences(Beijing), Beijing 100083, China
Abstract: This research studied the characteristics of fluid inclusions in the Mengqiguer uranium deposit and discussed the nature of the ore-forming fluid. The result revealed that the inclusions in the fractures of quartz are mainly inclusions of secondary liquid-rich brine inclusion and aqueous inclusion containing hydrocarbon. The homogenization temperature of inclusions varies from 51 to 77 ℃ with an average of 66.2 ℃; the salinity of inclusions ranges from 1.4% to 14.04% with an average of 4.49%; the metallogenic fluid density of inclusions ranges from 0.98 to 1.08 g/cm3 with an average of 1.01 g/cm3. The ore forming fluid, which has low temperature, salinity and medium temperature fluid low salinity, originated from meteoric waters. The calculated metallogenic pressure ranges from 38.74×105 to 80.48×105 Pa with an average of 53.31×105 Pa; the metallogenic depth ranges from 0.13 to 0.27 km with an average of 0.18 km. The Mengqiguer uranium deposit is an epithermal epigenetic uranium deposit. The linear relationships among salinity, density and metallogenic depth of inclusions indicated that the Mengqiguer uranium deposit underwent multi periods of mineralization.
Keywords: fluid inclusions mineralization fluid uranium deposit Xinjiang
*Corresponding Author, E-Mail: xiaoxi_0210@163.com
Bulletin of Mineralogy, Petrology and Geochemistry Vol. 34, No.1, 2015, page 201-207
