鄂尔多斯盆地塔然高勒铀矿床地球化学特征及其指示意义

Geochemical Characteristics of the Tarangaole Uranium Deposit in the Ordos Basin and Its Indicative Significance

塔然高勒铀矿床是东胜铀矿田内新发现的大型地浸砂岩型铀矿床。为研究该矿床的地球化学特征,系统采取了矿床内钻孔岩芯样品21件,通过等离子质谱、荧光光谱、电镜扫描等分析方法,对矿体上部的绿色砂岩、矿体下部的灰色砂岩和含矿的灰色砂岩开展了主量元素、微量元素、稀土元素的地球化学特征研究及铀矿物与黄铁矿、粘土矿物等共生组合关系研究。研究结果表明矿床内铀矿物主要为铀石;黏土矿物与成矿关系密切,在铀成矿过程中可吸附铀元素,使铀富集成矿;钇元素可以作为塔然高勒铀矿床内铀矿化的指示元素,钼元素可以作为铀矿化的参照元素;稀土元素主要赋存在铀矿石中,与铀共生。本研究成果对铀矿床的下一步勘查和铀矿冶工作具有重要的指导意义。

The Tarangaole uranium deposit is a newly discovered large-scale in-situ leachable sandstone-type uranium deposit in the Dongsheng uranium ore field.In order to study the geochemical characteristics of the deposit,21 samples of core rocks were collected from the ore deposit and analyzed by plasma mass spectrometry,fluorescence spectroscopy,scanning electron microscopy.The study on the geochemical characteristics of major elements,trace elements,rare earth elements and the symbiotic combination of uranium minerals with pyrite and clay minerals has been carried out.The results show that the main uranium mineral is coffinite and clay minerals in the deposit.These minerals are closely related to mineralization and can adsorb uranium during the uranium mineralization process.In additonal,Y and Mo can be respectively used as an indicator element and a reference element for uranium mineralization in the Tarangaole uranium deposit.Furthermore,REE are mainly found in uranium ore and co-exist with uranium.These research results have important guiding significance for the next exploration of uranium deposits and the work of uranium mining and metallurgy.