Characteristics and Genesis of Uranium Mineralization of Geminggou Deposit in Longshoushan, Gansu Province
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摘要: 革命沟矿床位于龙首山成矿带芨岭岩体的北带，矿石种类较多，通过对主要矿石进行研究表明，不同矿石具有不同的地球化学特征，也发育不同的矿化蚀变组合，但均表现为强烈硅化为主的酸性热液蚀变特征，硅含量明显增加，主要形成沥青铀矿物。综合分析认为，革命沟矿床是以充填裂隙和热交代作用为主的热液成因矿床；铀矿化受革命沟断裂及其次级断裂和构造角砾岩、大理岩与角闪岩岩性界面及硅化蚀变带所控制。Abstract: The Geminggou deposit is located in the northern part of the jiling rock mass in Longshoushan metallogenetic belt with various ore types. Study of main ores shows that different ores have different geochemical characteristics and different assemblages of mineralization alteration. What they have in common is the strong silicification of acid hydrothermal alteration and the forming of pitchblende with the obvious increase of silicon. Therefore, it is considered that Geminggou deposit is a hydrothermal deposit with the filling of fissures and the thermal metasomatism. Uranium mineralization is controlled by the Geminggou fault and its secondary faults, the lithologic interface of structural breccia, marble and amphibolites, and the silicified alteration zone.
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