新疆萨瓦莆齐铀矿床沥青还原沥青铀矿的直接证据  

Direct Evidences for Reduction of Pitchblende by Pitch in the Sawapuqi Uranium Deposit,Xinjiang

作　　者：陈宏斌 徐高中 扬明礼 王金平 李卫红 权建平 

机构地区：[1]核工业二○三研究所,陕西咸阳712021 [2]陕西省核工业地质局11队,西安712000

出　　处：《矿物岩石地球化学通报》2007年第3期245-248,共4页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家重点基础研究发展规划项目(2003CB2146007)

摘　　要：许多含油气盆地均有铀矿床分布,油气在铀矿化中的作用及其与铀矿化的关系是广大铀矿工作者关注的问题。通过对新疆萨瓦莆齐铀矿床中铀矿石的偏光、荧光反射显微镜研究和电子探针分析测试,首次在矿石中发现沥青-沥青铀矿-黄铁矿脉,对脉体中沥青、沥青铀矿、黄铁矿的空间关系研究表明,沥青铀矿和黄铁矿均受沥青脉的控制,是脉体中还原能力较强的轻烃类物质与周围环境相互作用的产物,矿物中的铀和铁元素主要来自周围环境而非脉体本身。矿床可能存在多期油气活动,沥青铀矿可能主要形成于早期油气活动,晚期油气衍生的沥青质沿早期生成的沥青铀矿微裂隙充填改造。Due to the distribution of uranium deposits in many oil-gas basins,the effect of oil-gas on the uranium mineralization and the relationship between oil-gas and uranium mineralization are important subjects concerned by many uranium geologists.A pitch-pitchblende-pyrite vein was firstly observed in the ore from the Sawapuqi uranium deposit in Xinjiang through the study of ores by using polarization-microscope,fluorescence-microscope and electron-probe.The special relationship among pitch,pyrite and pitchblende indicates that the distribution of pitchblende and pyrite is controlled by pitch vein.It is believed that this pitch-pitchblende-pyrite vein was formed through the interaction of light hydrocarbon and uranium and iron from surrounding environment.The uranium deposit could be formed in association with multi-stage oil-gas activities.The pitchblende could be mainly formed in the early stage of oil-gas activity,whereas the pith could be formed in the late stage of oil-gas activities in form of filling in fissures of the pitchblende.

关 键 词：萨瓦莆齐铀矿床 沥青 沥青铀矿 环境 

分 类 号：P619.14[天文地球—矿床学]