Study On Uranium Metallogenic Conditions And Prospects In The Sutaimiao Area,Inner Mongolia

The study area is located in the transitional zone between the Yimeng uplift and the Yishan slope of the third-order structural unit of the Ordos Basin.Based on the comprehensive analysis of tectonic evolution characteristics in the northern part o f the basin,it is proposed that the Mesozoic tectonic evolution of the basin provides favorable structural conditions for the formation of sandstone-type uranium deposits in the study area,revealing the major geological tectonic events of the basin during the Mesozoic skew and uplift.Nature and characteristics and its important control effects on Zhiluo Formation and uranium mineralization.According to the characteristics of paleoclimatic change and lithology development during the sedimentary period of the Zhiluo Formation,it is divided into the lower section(J2z1)and the upper section(J2z2).The lower section is composed of sandstone-based coarse clastic rocks deposited in a humid climate.The skeleton sand body of the inner ore.Through in-depth research on metallogenic conditions.The source,activation,migration,migration conditions and sedimentation and enrichment mechanism of uranium formation in the deposit are discussed in depth.It is believed that the formation of the deposit has a dual uranium source in the geological layer(body)of the source area and the Mesozoic strata.The river and the meandering river sand body are good passages for the transport of oxygen-containing uranium water.Pyrite,organic matter,etc.promote the precipitation and enrichment of uranium.According to the network degree of 2km×2km,the study is divided into 185 metallogenic units.The multi-information statistical regression method is used to calculate the metallogenic favorable degree,and the prospecting area of the study area is predicted.Among them,14 first-level favorable units There are 18 advantageous units in the second stage and 48 advantageous units in the third stage,and preliminary estimates are made for the potential uranium resources of the favorable units at all levels.The uranium ore-forming potential in the area is summarized.It is believed that the uranium mineralization potential in the study area is relatively large,and it has the resource potential to form a sandstone-type uranium deposit with a medium-sized scale.