论文部分内容阅读
本文在讨论岩石的沉积期后变化的基础上,对矿床成因提出了认识。该铀矿床的形成经历了沉积、成岩和后生过程。铀的主要矿源层为硅灰岩透镜体。硅灰岩透镜体的铀乎均含量比克拉克值高出1—2个数量级,其它伴生元素(Zn、Mo、Cu、Ni和As等)含量也较高。该矿床形成的过程是:在轻微变质、构造运动和火山作用参与下,地下深处聚集的水受热形成温度不太高的热水溶液,它对含铀硅灰岩透镜体岩石中的有益组分进行“活化”迁移,并在较短距离内于合适的环境(氧化-还原过渡带或还原带)中富集成矿。此矿床应归为岩生(或岩源)矿床类型。
Based on the discussion of the changes of rocks after sedimentary period, this article put forward the cognition of the genesis of the deposit. The formation of the uranium deposit underwent sedimentation, diagenesis and epigenetic processes. The main source layer of uranium is a silica lens. The content of uranium in the lens of wollastonite is 1-2 orders of magnitude higher than that of Clarke, and the contents of other accompanying elements (Zn, Mo, Cu, Ni and As) are also higher. The formation process of this deposit is that, with the involvement of minor metamorphism, tectonic movement and volcanism, the water gathered in the deep underground forms a hot solution of not too high temperature by heat, which affects the beneficial components in the uraniferous limestone lens rock Perform “activated” migration and enrich the mineralization within a short distance in the right environment (redox transition or reduction zone). This deposit should be classified as a rock type (or source rock type).