Uranium Deposits of Erlian Basin (China): Role of Carbonaceous Debris Organic Matter and Hydrocarbon Fluids on Uranium Mineralization
| Autor: | Xi-De Li, Lin-Fei Qiu, Zhong-Bo He, Bao-Qun Hu, Long Gao, Wu-Sheng Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
carbonaceous debris Geochemistry chemistry.chemical_element Geology Mineralization (soil science) 010501 environmental sciences Uranium Mineralogy 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences uranium mineralization Petrography Uranium ore Hydrocarbon chemistry Sedimentary organic matter Organic matter sandstone-type uranium deposit Clay minerals migrated hydrocarbon QE351-399.2 0105 earth and related environmental sciences |
| Zdroj: | Minerals, Vol 11, Iss 532, p 532 (2021) Minerals Volume 11 Issue 5 |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min11050532 |
| Popis: | The relationship of sedimentary organic matter, oil-gas and sandstone-type uranium (U) deposits is the key problem of U-mineralization. Whether migrate hydrocarbons participate in U-mineralization is still a controversy. Typical U deposits of the Erlian Basin in northeast China have been investigated through detailed petrography, mineralogical, micro spectroscopic, organic geochemical and C-isotope studies. Petrographic observations, Microscopic Laser Raman Spectroscopic, Infrared Spectroscopic and Scanning Electron Microscope analyses indicated there are three types of organic matter (including carbonaceous debris and migrated hydrocarbons). A significant amount of uranium was associated with pyrites, clay minerals and carbonaceous debris organic matter, either coexisted with hydrocarbon fluids. There are at least two stages mineralization events, stage I is related to sedimentary organic matter (syngenetic pre-enrichment stage), and stage II is related to mobile hydrocarbon fluids (main mineralization stage). Therefore, our results support that migrated hydrocarbons were involved as a reducing agent for the main uranium mineralization after synsedimentary mineralization. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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