A study of geological-geophysical characteristics of uranium deposits in Jiling pluton
Zhen-Tao SONG1,2, Cheng QI1,2(), Dong-Yu HAN1,2, Bo LIU1,2, Wei ZHANG1,2, Xin-Xin HE1,2, Dong-Hua SUN1,2, Bin WEI1,2, Yong-Shun LIANG1
1. Airborne Survey and Remote Sensing Center of Nuclear Industry, Shijiazhuang 050002, China 2. CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource, Shijiazhuang 050002, China
Through the study of ore deposit geology of uranium deposits in Jiling pluton of Longshoushan metallogenic belt, the authors hold that, although the ore-bearing sandstones are different, different types of uranium mineralization have some similarity in that the ore deposits all underwent such evolution processes as magmatic differentiation, enrichment at the edge of rock mass, and hydrothermal activity and all exhibit the uranium element differentiation, migration and enrichment mechanism. Deposits of the geophysical field can be compared with each other. Through in depth study and a comparison of physical characteristics of three typical types of uranium deposits (siliceous veins, cryptoexplosive breccia type, alkaline complex type), the authors found that uranium deposits are generally located in the transition region between strong and weak magnetic anomalies with some favor to the weak magnetic anomaly side; in the resistivity profile, uranium deposits are mostly located in high and low resistance variation gradient belt or in the middle and lower resistance zone; in the resistivity plan, uranium deposits are located in the middle and lower resistance transition zone with some favor to the low resistivity side. The area of the electric and magnetic intensity anomaly transition zone with some favor to the weak anomaly side can be used as a new geophysical prospecting mark.