Study On Abnormal Environmental Resistivity Of Uranium Deposition In Hecaokeng Area And Analysis Of Prospecting Potential

Hecaokeng area is located in the middle of polymetallic metallogenic belt of Wuyishan,at the western edge of the Dafuzu complex rock mass,at the same time,it is also an important uranium metallogenic belt in China Witch has favorable geological conditions for uranium mineralization.Prospecting by predecessors,The ore bodies are mainly concentrated in the 350 ~50 m elevation controlled by tectonic faults,and the "green" altered granite is rich in polymetallic sulfide,Depth of exploration not more than 300 m.The analysis view that there is a great prospecting space in the deep.In this paper,combined with the " The investigation of Hecaokeng uranium resources evaluation area of Wuyishan metallogenic belt" project,Through the audio magnetotelluric apparent resistivity data interpretation,in the area of deep resistivity change characteristics and uranium mineralization relationship analysis of Hecaokeng uranium metallogenic region apparent resistivity anomaly environment.The author has conducted a detailed study of the audio frequency magnetotelluric sounding in the ore bearing area of the known uranium deposit area,The results show that the variation of apparent resistivity in the favorable position of uranium mineralization(altered granite belt)is from 500~1000?·m.On the basis of this,the distribution range of altered granite in each section of the study area is delineated.Based on the inversion of 2D resistivity sections,Combined with geological data,the apparent resistivity plane of the elevation 100 m,0m,-100 m,-300 m and-500 m were plotted respectively.According to the variation characteristics of apparent resistivity anomalies at different depths and the extension of ore controlling and ore hosting structures,On the whole,the areal distribution of altered granite at various depths was analyzed.Based on the two-dimensional inversion profile and the depth-dependent resistivity plane of each line,the three-dimensional spatial distribution map and the thickness distribution of the altered granite are drawn according to the abnormal environmental conditions of uranium mineralization resistivity.,It is inferred that the spatial distribution,domination and ore-controlling structure of granite "green" alteration zone are inferred,and five favorable locations with potential for prospecting are finally identified in the study area,which is important for further uranium prospecting...