新疆511砂岩型铀矿床稳定同位素地球化学特征  

Geochemical Feature of Stable Isotopes in Sandstone-type Uranium Deposit 511 in Xinjiang,China

作　　者：曾爱花[1] 潘家永[1] 

机构地区：[1]东华理工大学地球科学学院,江西抚州344000

出　　处：《铀矿地质》2013年第2期72-77,共6页Uranium Geology

基　　金：国家自然科学基金项目"新疆511铀矿床中硒的赋存状态与富集规律"(编号:40872072)资助成果

摘　　要：511铀矿床是地浸砂岩型铀矿床的典型代表,对其开展稳定同位素地球化学特征研究有助于同类矿床的发现和开采工艺的设计选择。笔者结合511铀矿床地质概况,利用元素分析仪-质谱联机(EA-MS)系统、MAT-253质谱仪、GAS-Bench和GASBENCH-MAT253连续硫同位素质谱仪对该矿床的硫、碳、氢、氧同位素进行系统分析,结果表明其硫同位素与硫酸盐还原细菌作用生成硫化物的过程密切相关,碳同位素很可能来源于有机碳;碳、氢、氧同位素组成均为较低的负值,表明成矿流体主要来自于大气降水。Uranium deposit 511 is a typical in-situ leachable sandstone-type uranium deposit, study on its geochemical characteristics of stable isotopes may give help to the exploration and mining design of orther deposit of the same kind. Considering the geology feature of uranium deposit 511, we analyzed its geochemical features of stable isotopeic S, C, H and O by using EA-MS, MAT-253, GAS-Bench and GASBENCH-MAT253 facilities. The experimental results indicated that S has close relationship with the process of sulfate changing into sulphide through reducing bacteria, C may come from organic carbon, the relative low and negative value of C, H and O isotopes suggest that the metallogenic fluid were originated from atmospheric precipitaion.

关 键 词：砂岩型铀矿床 稳定同位素 地球化学特征 

分 类 号：P597.2[天文地球—地球化学]