Geophysical Characteristics of the Target Layer and Exploration Prospects for Sandstone-type Uranium Deposits in Northern Qaidam Basin
Located in the northern margin of Qaidam uplift,the target layer in the northern Qaidam Basin is of favourable conditions for sand-type uranium mineralization.Based on uranium geological conditions,we analyzed the geophysical parameters of the target layer with multiple geophysical methods,such as geophysical logging,gamma ray spectrometry,activated carbon measurement and CSAMT method.The formation is of remarkable variation of geophysics parameters,the sanstone is with high uranium,high thorium and low potassium and uranium deposits in target sandstones are with high resistance.Sandstones are widely exist in the target layer Shangganchaigou Formation.The ternary structure of mud-sand-mud was quite well developed in the area,the grey reductant sandstones in the target layers,including fine sandstones and coarse sandstones,usually have high contents of uranium.According to geology-geophysics response characteristic,we concluded that radioactive anomaly is the direct clue to find out the location of uranium mineralization.Sector between two high radioactive areas,as well as inflated parts inside uranium anomaly area,are the potential positions for uranium deposits,which can be used as technical reference for uranium exploration in northern Qaidam Basin.
the northern Qaidam Basinsandstone-type uraniumgeophysical characteristicsradioactivity
国家科技期刊平台
NSTL
万方数据
