东胜砂岩型铀矿形成中天然气地质作用的地球化学特征

Geochemical behavior of geologic process of natural gas during mineralization of Dongsheng sandstone-type uranium deposit

吴柏林 王建强 刘池阳 王飞宇

Wu Bolin Wang Jianqiang Liu Chiyang Wang Feiyu

天然气包裹体的观察测试、流体温度测试以及后生蚀变形成的矿物学和地球化学性质、包裹体氢氧稳定同位素的示踪、油气充注与铀成矿年龄的对比等研究表明,东胜矿床漂白现象和绿色后生蚀变以及铀矿化的形成主要与天然气地质作用有关,天然气为上古生界来源的煤成气。主要的铀成矿还原剂是CH4等有机烃类气体及部分CO,HS和H等。因此,东胜铀矿的成因主要与天然气地质作用有关。

Observation and testing of gas inclusion,fluid temperature,mineralogy and geochemical behaviors of minerals from epigenetic alteration,tracing of inclusion's hydrogen and oxygen stable isotopes,and correlation of oil/gas charging and uranium mineralization phases indicate that the bleaching phenomena and green epigenetic alteration,as well as uranium mineralization in Dongsheng deposit are mainly related with geologic process of natural gas.The natural gas is mainly of humic gas from the Upper Paleozoic.The main reducing agents for uranium mineralization are organic hydrocarbon gas,such as CH,and some CO,HS and H.Therefore,the genesis of Dongsheng Uranium deposit is mainly related with geologic process of natural gas.

10.11743/ogg20060213