Exploration orientation of leachable sandstone type uranium deposit in Erlian basin

Erlian basin is a large meso-cenozoic uraniferous basin.Great achievement of leachable sandstone type uranium deposit exploration has been made in the basin in recent years. By systematicaly summarizing and analyzing exploratory results, this article has established the principle for ascertaining target layer and put forward Saihan formation as the main target layer and Erlian formation and Yierdingmanha formation as the secondary target layers for uranium exploration in Erlian basin. The exploratory type in Erlian basin is inter-layered oxidation type(including phreatic-interlayer type). Besides, this article summarizes the criterions for uranium exploration and analyzes the exploratory prospect and orientation. The paper points out that the south edge of Bayinbaolige uplift (northern part of Wulanchabu depression and Manite depression) is the most favorable area for leachable sandstone type uranium deposits exploration in Erlian basin. (authors)