Coupling relationship between oil and gas of Mesozoic coal-bearing measures and uranium metallogenesis in Huangling area

Authors

SI Qinghong, Tianjin Center, China Geological Survey, Tianjin 300170, China
CAO Huifeng, Geological Survey Institude of China Nuclear Industry Group Co. Ltd., Xian 710100, China
LI Jianguo, Tianjin Center, China Geological Survey, Tianjin 300170, ChinaFollow
SIMA Xianzhang, Tianjin Center, China Geological Survey, Tianjin 300170, China
YU Reng‘an, Tianjin Center, China Geological Survey, Tianjin 300170, China
LIU Houning, Geological Survey Institude of China Nuclear Industry Group Co. Ltd., Xian 710100, China
LIU Xiaoxue, Tianjin Center, China Geological Survey, Tianjin 300170, China
ZHANG Chao, Tianjin Center, China Geological Survey, Tianjin 300170, China

Abstract

In order to clarify the coupling relationship between oil and gas of Mesozoic coal-bearing measures(reservoir) and uranium deposits(points) in Huangling area, field geology investigations of boreholes and sections, analysis and processing of borehole data and experimental data, and integration of reservoir and uranium(point) information were carried out. Collation and systematic study of tectonic-sedimentary systems of Mesozoic coal-bearing mesure, uranium geological characteristics, oil and gas geology characteristics, spatial distribution relationship between hydrocarbon reservoirs and uranium deposits, genetic relationship between hydrocarbon-bearing fluids and uranium-associated altered minerals, and the time relationship between hydrocarbons and uranium mineralization were discussed. The study shows that the uranium deposits of Mesozoic coal-bearing(spots) measures were mostly distributed near the boundary of the bedrock erosion or small faults, and the horizontal projection is located at the periphery of the favorable oil and gas facies belt. The hydrocarbon fluid components and the intermediate products of the coalbed gas may have participated in the re-dox reactions, then the uranium associated altered minerals such as pyrite, clay minerals, and calcite have been produced. The main hydrocarbon generation period of Mesozoic coal-bearing source rocks was overall earlier than the main miner-alization period of uranium deposits, and hydrocarbon fluids may have migration time conditions that affected uranium mineralization.

Keywords

Huangling area, Mesozoic, coal-bearing measures, oil-gas reservoir, uranium deposits(points), hydrocarbon-bearing fluids, uranium-associated altered minerals

DOI

10.3969/j.issn.1001-1986.2019.01.003

Recommended Citation

SI Qinghong, CAO Huifeng, LI Jianguo, et al. (2019) "Coupling relationship between oil and gas of Mesozoic coal-bearing measures and uranium metallogenesis in Huangling area," Coal Geology & Exploration: Vol. 47: Iss. 1, Article 4.
DOI: 10.3969/j.issn.1001-1986.2019.01.003
Available at: https://cge.researchcommons.org/journal/vol47/iss1/4

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