江西乐安居隆庵铀矿床绿泥石特征及地质意义

发布时间：2018-03-14 10:33

  本文选题：居隆庵铀矿床　切入点：绿泥石　出处：《岩石矿物学杂志》2017年04期 　论文类型：期刊论文

【摘要】：位于相山铀矿田西部的居隆庵铀矿床绿泥石化十分强烈,本文在对钻孔岩心样详细的野外和室内岩相学观测基础上,利用电子探针技术研究了绿泥石的产出状态及共生组合关系,并测定了其化学成分,探讨了该矿床绿泥石地球化学特征及其与铀矿成矿的关系。研究表明:①该矿床存在黑云母蚀变形成的绿泥石、长石蚀变形成的绿泥石、脉状绿泥石和与铀矿密切共生的绿泥石共4种类型绿泥石;②该矿床以蠕绿泥石和铁镁绿泥石为主,个别为鲕绿泥石,其形成温度介于190.5~269.9℃之间,平均为224.5℃,属于中低温条件;③该矿床绿泥石形成于还原环境,形成机制分为溶解-沉淀机制和溶解-迁移-沉淀机制两种;④绿泥石化过程改变了围岩的物理化学性质,改变了铀在岩石中的赋存状态并促使铀的预富集。
[Abstract]:The green mud fossilization of the Julongan uranium deposit located in the west of Xiangshan uranium field is very strong. The production state and symbiotic association of chlorite were studied by electron probe technique, and the chemical composition of chlorite was determined. The geochemical characteristics of chlorite and its relationship with uranium mineralization are discussed. The results show that there are chlorite formed by biotite erosion and chlorite formed by feldspar erosion in the W 1 deposit. There are four types of chlorite of vein chlorite and chlorite closely associated with uranium deposit. The deposit consists mainly of vermicular chlorite and ferric magnesium chlorite, some of which are oolitic chlorite. The formation temperature of the deposit is between 190.5 and 269.9 鈩，

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