Metallogenic Geological Features and Prospective Study for Sandstone-Type Uranium Deposit in Bel-Ulson Depression
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摘要: 目前，在海拉尔盆地贝尔-乌尔逊凹陷内已开展了两轮的铀矿调查评价项目，并发现了多个铀矿化异常孔。笔者对已有资料进行了分析，认为该凹陷具备丰富的铀源、有利的沉积相带、良好的赋矿砂体、稳定的顶、底板泥岩隔水层，同时研究区南部发育构造斜坡带，为区内后生氧化的持续进行提供了条件。区内构造沟通深部的还原流体，对目的层伊敏组进行还原，为铀成矿提供了良好的环境。因此，贝尔-乌尔逊凹陷具备有利的铀成矿条件，铀成矿潜力较大。Abstract: Bel-Ulson depression is located in Hailar basin. two rounds of uranium deposit assessments here have found some abnormal drill holes of uranium mineralization. An analysis of the existing data indicats that the depression has an abundance of uranium sources, favorable sedimentary facies belts and ore-bearing sand bodies, stable mudstone aquiclude at the top and the bottom, and meanwhile the structural slopes in the south of the study area provide conditions for the epigenetic oxidation. Deep fluids through structural channels reduce the layer of the Yimin Formation， providing suitable environment for uranium mineralization. In general, Bel-Ulson depression has favorable conditions and potential for uranium mineralization.
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