我国砂岩型铀矿床研究与勘查新进展

砂岩型铀矿,目前是我国铀矿地质找矿的主要方向之一。该类矿床多分布于中、新生代层间氧化带内,赋矿深度较大,找矿具有一定的局限性,因此开展对砂岩型铀矿的找矿方法探索具有重要的意义。该类矿床勘查的方法主要有活性炭吸附氡法、放射性水化学法、腐殖酸抽提法、分量化探法、深穿透地球化学法、地球电化学法等本文通过总结这些方法的原理、适用条件及注意事项,提出采用多种方法追踪铀矿异常可更有效的发现矿化信息。

Advances in the Research and Prospecting of Sandstone-Type Uranium Deposits in China

Sandstone-type uranium deposit occurs usually in the interstratified oxidation zone of a Mesozoic-Cenozoic basin. The deposit occurs commonly at the depth. It＇s prospecting methods are： 1） Adsorption radon by activated carbon; 2） Geochemical survey of radioactive water; 3） Partial extraction of the associated elements by humic acid; 4） Partial extraction of uranium and associated elements; 5） Deep-penetrating geochemistry; 6） Geo-electrochemical method. This paper has a discussion on principle, operating procedure and matters needing attention for these methods, and believes good results of comprehensive methods.