Characteristics And Prospect Prediction Of Uranium Deposits In Hetaoba Area,Duolun County,Inner Mongolia

The Duolun volcanic basin in Inner Mongolia is an important area for the study of volcanic rock-type uranium deposits in the north of the Xilamulun fault.It belongs to the northern margin of the North China Block.There are a lot of Mesozoic and Cenozoic volcanic rocks in this area.Spatially,the Xilamulun suture zone is bounded by the Xilamulun suture zone.The Yanliao-polymetallic metallogenic belt in the northern margin of the North China Block and the junction of the Guyuan-Hongshanzi uranium metallogenic belt in the NE direction are located at the same time between the Guyuan 460 uranium-molybdenum deposit and the Keshiketengqi 470 uranium deposit.They have the same tectonic location and similar hydrothermal conditions,and are the important targets for the exploration of volcanic lithologic uranium deposits.1.By collecting the basic geological,geophysical and geochemical remote sensing data in the study area,comprehensive research and analysis are carried out,and drilling verification is carried out locally.Meanwhile,radon measurement,IP elevator measurement and ground gamma-ray spectrometry measurement are carried out to comprehensively evaluate the study area.Combined with the achievements of various geophysical and geochemical methods,in-depth understanding is made.This paper analyzes the ore-controlling factors and metallogenic characteristics of Hetaoba area,studies the relationship between magmatic rocks,structures and uranium orebodies,forecasts and analyzes the prospecting potential of uranium and polymetallic deposits in Hetaoba area,and finally delineates the prospecting target area.Based on the analysis of the survey data of the Hetaoba uranium deposit route,five favorable structural belts for mineralization are divided in the Hetaoba area,which are important structural belts in the area and have the characteristics of controlling rock and m four zones with high resistivity and low polarizability are delineated by IP middle ladder survey,which are near north-south distribution and are favorable for prospecting,and are in good agreement with geological results;the ground gamma-ray spectrometry results show that high-value anomalies of energy spectrum are developed at the junction of structures,indicating that the junction of structures may be formed.The shallow buried uranium-rich orebodies and the three hypothetical ore-forming favorable areas are basically consistent in local distribution and spatial distribution.This paper summarizes the uranium metallogenic model,magmatic evolution and hydrothermal activity in Hetaoba area,and emphatically discusses the relationship between uranium enrichment and metallogenic mechanism and characteristics.Finally,the uranium metallogenic prospective area is predicted.