关键词: 铀矿, 深部找矿, 地电化学勘查, 找矿预测, 找矿远景区

Abstract: Xiangshan is an important uranium reserve base in China,but no progress has been made in prospecting in the middle part of Xiangshan because of the deep basement of the volcanic basin.In order to build the technical system of deep uranium exploration and develop the deep prospecting technology of geochemical exploration,Lejia survey area was selected as the study area,and the prediction work of geo-electric extraction survey method was carried out in the central area of Xiangshan.The results show that the spatial distribution characteristics of elements are closely related to the structure of Xiangshan volcanic basin and uranium mineralization.The anomalies of U,Th,Mo reflect the main mineralization,and the background values of U and Th are mainly controlled by the depth of the basement,showing a NW zonal distribution,which is consistent with the results inferred by geophysical exploration methord of AMT.The anomalies of Pb,As,and Sb may reflect acidic magma and hydrothermal activity.The above characteristics show that the spatial distribution characteristics of each element are closely related to the structure of Xiangshan volcanic basin and uranium mineralization.Geo-electric extraction survey can better reflect the geological conditions and metallogenic laws of the study area,and can provide more reliable information for deep ore prospecting.Based on the above analysis results,three prospecting prospect areas were delineated,including Xingshuxia,Shangjialing,and the NE side of Lejia,and among these areas,Xingshuxia is the best.

Key words: uranium deposit,deep prospecting,geoelectrochemical survey,prospecting prediction,prospecting prospect area