伊犁盆地南缘可地浸砂岩型铀矿的重大突破

介绍了“八五”以来伊犁盆地南缘浸砂岩型铀矿勘查工作部署,分析了研究了盆地南缘铀成矿地质条件及成矿规律,认为地浸砂岩型铀矿完全受层间氧化带控制,新构造运动形成的单斜带和不整合面、有利的岩相岩性、富含有机质及黄铁矿等还原剂、良好的水文地质条件、干旱半干旱的古气候、发育层间氧化带,这五位一体是伊犁盆地南缘地浸砂岩型铀矿形成的重要条件,介绍了通过“解剖、探索、扩大”陆续发现512、511、513铀矿床的过程。总结了铀矿勘查工作的经验和体会。

IMPORTANT BREAKTHROUGH IN EXPLORATION OF IN-SITU LEACHABLE SANDSTONE-TYPE URANIUM DEPOSITS AT SOUTHERN MARGIN OF ILI BASIN

The exploration of in-situ leachable sandstone-type uranium deposits since the "Eighth Five-Year Plan" at the southern margin of Ili basin is introduced. The geological condition and metallogenic regularities of uranium mineralization are-studied. The analytic result shows that in-situ leachable sandstone-type uranium mineralization is strictly controlled by interlayer oxidization zones. Five important aspects for uranium mineralization cover monoclinic strata formed by neotectonic movements, excellent hydrogeological condition, arid to semi-arid paleoclimate and the development of interlayer oxidization zones. The process of discovering uranium deposits 512, 511, and 513 is also introduced. Finally a summary and understanding of the exploration of uranium deposits are made.