鄂尔多斯盆地西南缘太原组煤系地层含铀特征初探OA

Ordos Basin is an important multi-energy symbiotic basin in China,which is rich in uranium resources.The study area is located in Tongxin area,Baima township in the southwest of Ordos Basin.The distribution of multiple airborne radioactive anomalies newly discovered in the area is closely related to the coal-bearing strata of Taiyuan formation.In this paper,through the ground verification and physical property measurement of the airborne radioactive anomaly of Taiyuan formation,combined with the airborne radioactivity measurement data,the uranium-bearing characteristics of Taiyuan formation in the typical anomaly area were studied by means of ground gamma total measurement,energy spectrum measurement and soil radon measurement,and the typical anomaly HFU-05 was analyzed and summarized.The results show that the coal measure strata of Taiyuan formation can not only form uranium-bearing coal-type uranium mineralization,but also provide rich uranium source for the Mesozoic-Cenozoic sedimentary cover.The HFU-05 anomaly area and its surroundings have good uranium source,stratigraphic configuration,structural and hydrogeological conditions,and have good prospecting significance for sandstone-type uranium deposits.Through the detailed investigation in aeroradioactive anomaly HFU-05,the geological characteristics and metallogenic conditions of uranium-bearing coal type anomaly were discussed.It was considered that the coal measure strata of Taiyuan formation in Ordos Basin have good uranium metallogenic conditions,which provides an important geophysical basis for uranium prospecting in Ordos Basin.