内蒙塔木素砂岩型铀矿中硒矿物的发现与意义

THE DISCOVERY OF SELENIUM-BEARING MINERALS IN THE TAMUSU SANDSTONE-TYPE URANIUM DEPOSITS,INNER MONGOLIA,CHINA AND ITS SIGNIFICANCE

通过电子探针研究,在内蒙巴音戈壁盆地塔木素砂岩型铀矿矿石中发现了硒铅矿、白硒铁矿、硒铜蓝、硒铜镍矿、斜方硒铜矿等5种硒的独立矿物,这些硒的独立矿物往往呈细粒状、蠕虫状分布在黄铁矿与石英、长石的边缘或矿物的裂隙中。硒铅矿、白硒铁矿等硒矿物是典型的中低温热液矿物,这些矿物的发现表明塔木素铀矿床曾经历中低温热液阶段。

The Tamusu uranium deposit is a typical sandstone-type uranium deposit which has been discovered in recent years in Inner Mongolia, China. High Se contents （more than 500 × 10^-6） were detected in uranium ores, meanwhile five selenium-bearing minerals such as clausthalite （PbSe）, ferroselite （ FeSe2） , penroseite [ （ Ni, Co, Cu） Se2 ] , klockmannite （CuSe） and athabascaite （CusSe4 ） were discovered based on EPMA study of uranium ores. These selenium-bearing minerals were distributed on the edges of or in the fissures of pyrite, quartz and feldspar. Selenium-beating minerals such as clausthalite and ferroselite were formed in the moderateor lower temperature hydrothermal system, so it is inferred that the Tamusu uranium deposit was reformed under moderateor lower temperature hydrothermal condition.