Biogenic and petroleum-related ore-forming processes in Dongsheng uranium deposit, NW China
文献类型：期刊论文
| 作者 | Cai, Chunfang; Li, Hongtao; Qin, Mingkuan; Luo, Xiaorong; Wang, Feiyu; Ou, Guangxi |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2007-09-01 |
| 卷号 | 32期号:1-2页码:262-274 |
| 关键词 | bacterial sulfate reduction petroleum delta C-13 delta S-34 uranium Dongsheng China |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2006.05.003 |
| 文献子类 | Review |
| 英文摘要 | Sandstone-hosted roll-type U deposits has recently been found in the Middle Jurassic Zhiluo Formation in the Dongsheng area, north of the Ordos Basin. In order to assess the origin of the uranium mineralization, the host sandstone has been investigated, with emphasis on delta S-34 values of ore-stage pyrite, delta C-13 of calcite, fluid inclusion oil biomarkers, X-ray diffraction, ICP-MS, as well as studies by electron microprobe and scanning electron microscope. The mineralization consists mainly of coffinite. Some of the coffinite is intimately intergrown with ore-stage pyrite, indicating co-precipitation. Ore-stage pyrite has delta S-34 values from - 34 to + 17%o, suggesting the pyrite sulfur originated from bacterial sulfate reduction. In the host sandstone, calcite cement exhibits delta C-13 values from - 27.6 to - 2.1%o and fluid inclusion oils show evidence of biodegradation. These lines of evidence indicate petroleum was likely oxidized by sulfate-reducing bacteria (SRB) and thus supplied a source of some of the carbon in the calcite. Microbial degradation of petroleum is partially supported by the low-temperature diagenetic environment (< 70 degrees C). Thus, SRB were likely to reduce sulfates to sulfides simultaneously with petroleum oxidization, and caused direct or indirect reduction of hexavalent uranium [U(VI)] to tetravalent uranium [U(IV)]. U(VI) pre-concentration by adsorption and subsequent inorganic reduction is likely to be less significant than direct reduction of U(VI) by SRB in the Dongsbeng deposit. This is because ore-stage solution is non-acidic (pH = 8 to 10), as indicated by abundance of ore-stage pyrite and calcite cement and lack of marcasite in the host sandstone. (c) 2006 Elsevier B.V All rights reserved. |
| WOS关键词 | THERMOCHEMICAL SULFATE REDUCTION ; ORDOVICIAN CARBONATES ; ANAEROBIC OXIDATION ; REDUCING BACTERIA ; SEDIMENTARY-ROCKS ; ISOTOPIC EVIDENCE ; TARIM BASIN ; ORIGIN ; WATER ; COFFINITE |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000249859200010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67934]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Cai, Chunfang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Beijing Res Inst Uranium Geol, Beijing 100029, Peoples R China 3.Petr Univ, Inst Resource & Informat, Beijing 102249, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Chunfang,Li, Hongtao,Qin, Mingkuan,et al. Biogenic and petroleum-related ore-forming processes in Dongsheng uranium deposit, NW China[J]. ORE GEOLOGY REVIEWS,2007,32(1-2):262-274. |
| APA | Cai, Chunfang,Li, Hongtao,Qin, Mingkuan,Luo, Xiaorong,Wang, Feiyu,&Ou, Guangxi.(2007).Biogenic and petroleum-related ore-forming processes in Dongsheng uranium deposit, NW China.ORE GEOLOGY REVIEWS,32(1-2),262-274. |
| MLA | Cai, Chunfang,et al."Biogenic and petroleum-related ore-forming processes in Dongsheng uranium deposit, NW China".ORE GEOLOGY REVIEWS 32.1-2(2007):262-274. |
入库方式： OAI收割
来源：地质与地球物理研究所
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