Hydrochemical characteristics and significance of the Hongshan Lake in the Tianshuihai area, Xinjiang, China
XIAO Rui1(), PANG Shou-Ji1(), ZHU You-Hai1, ZHANG Shuai1, ZOU Yi1,2
1. Oil & Gas Survey, China Geological Survey, Beijing 100083, China 2. School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
Focusing on the spring and lake water in the Hongshan Lake in the Tianshuihai area, Xinjiang, China, this study explored the formation process of the hydrochemical components in the water and the geochemical characteristics and sources of the water bodies through hydrogeochemical testing and analyses. Accordingly, the hydrocarbon-related hydrogeochemical information was obtained. The results are as follows: The spring water in the Hongshan Lake is weakly alkaline in general and dominated by brackish water. The mass concentration of main ions in the water bodies increases with increasing salinity. The water has a hydrochemical type of Na-HCO3 and is mainly charged by atmospheric precipitation, which interacts with the surrounding rocks during the deep circulation along faults or fractures. The salinity, hydrochemical type, and characteristic coefficient of spring water indicate that the groundwater in this area features weak hydrodynamic force and deep metamorphic degree, which are similar to the characteristics of the formation water associated with hydrocarbon in oil fields. Therefore, it can be inferred that the geological environment in this area is conducive to the generation and preservation of hydrocarbon resources.
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