Geological Characteristics and Control Mechanism of Uranium Enrichment in Coal-Bearing Strata in the Yili Basin, Northwest China-Implications for Resource Development and Environmental Protection.
Geological Characteristics and Control Mechanism of Uranium Enrichment in Coal-Bearing Strata in the Yili Basin, Northwest China-Implications for Resource Development and Environmental Protection.
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DOI：
10.1021/acsomega.1c06754
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发表时间：
2022-02-15
期刊：
影响因子：
4.1
通讯作者：
Zhang B
中科院分区：
文献类型：
--
作者：
Bai H;Wang W;Lu Q;Wang W;Feng S;Zhang B
伊犁盆地侏罗系含煤地层中普遍存在铀富集现象。近几十年来，我国发现了大量的铀矿床（点）。以往的研究发现，铀矿床与煤层在成因和空间分布上具有一定的相关性，有时直接在煤层中发育铀矿床。铀浓缩的地质特征是什么？铀是如何浓缩的？如何加强铀煤合作开发与环境保护？为解释上述问题，本文综述了铀矿床特征、岩石矿物特征、地球化学和成矿年代学，并探讨了含煤地层中铀富集的地质控制机制。研究发现，伊犁盆地南缘的铀富集（包括砂岩型铀矿床和煤型铀矿床）具有多期成因特征，主要分布在盆地南缘的缓坡带，赋矿岩石可能为砂岩、煤，有时也可能为泥岩。铀的浓度与还原剂有很大的相关性，铀的赋存状态既有无机亲合性，也有有机亲合性。铀的富集是高铀源岩、构造活动、沉积相、水文地质条件、古气候、还原剂等因素综合作用的结果。不同之处在于砂岩中的铀富集通常是在泥-砂-泥地层结构中形成的，而煤中的铀富集通常是在煤-砂-泥地层结构中形成的。加强赋矿岩石理化性质研究，加强铀赋存状态研究，实现地质资料共享，是煤铀资源协同开发和环境保护的重要途径。
Uranium enrichment is considerably prevalent in Jurassic coal-bearing strata in the Yili Basin. A large amount of uranium deposits (occurrences) have been discovered in recent decades. Previous studies have found that uranium deposits and coal seam have a certain correlation in their genesis and spatial distribution or sometimes uranium deposits develop directly in the coal seam. What are the geological characteristics of uranium enrichment? How is uranium enriched? How to strengthen the cooperative development of uranium and coal and environmental protection? In order to explain the aforementioned questions, the characteristics of uranium deposits, rock minerals, and geochemical and metallogenic chronology are summarized herein, and the geological control mechanism of uranium enrichment in coal-bearing strata is discussed. It is found that uranium enrichment (including sandstone uranium deposits and coal uranium deposits) has multistage genetic characteristics and is mainly spread over the gentle slope of the southern margin of the Yili basin, with its host rock possibly being sandstone, coal, and sometimes even mudstone. The uranium concentration has a considerable correlation with the reductant, and the occurrence state of uranium has both inorganic and organic affinities. In addition, uranium enrichment is believed to be a comprehensive effect of high uranium source rocks, tectonic activity, sedimentary facies, hydrogeology conditions, paleoclimate, and reductant. The difference is that uranium enrichment in sandstone is often generated in a mud-sand-mud stratigraphic structure, while uranium enrichment in coal usually develops as coal-sand-mud. What is more, strengthening the study of physical and chemical properties of the host rock, strengthening the study of uranium occurrence state, and sharing geological data are important ways for the cooperative development of coal and uranium resources and environmental protection.
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影响因子：
2.9
作者：
Chen, CM;Lu, HF;Wu, SM
通讯作者：
Wu, SM
影响因子：
2.9
作者：
ALLEN, MB;WINDLEY, BF;CHI, Z
通讯作者：
CHI, Z
影响因子：
3.3
作者：
Bonnetti, Christophe;Liu, Xiaodong;Cai, Jiangfang
通讯作者：
Cai, Jiangfang
影响因子：
3.5
作者：
Barbarin, B
通讯作者：
Barbarin, B
影响因子：
6.1
作者：
Biske, Yu. S.;Seltmann, R.
通讯作者：
Seltmann, R.