Three-dimensional Geological Modeling And Analysis In Eastern Of Zoujiashan Exploration Area In Xiangshan Uranium Orefield

Xiangshan volcanic basin is one of the important produced area of volcanic rock type uranium in our country.In the late 1950,the nuclear industry geological systems in this region carried out a large number of geological survey,exploration and scientific research work.Since more than fifty years,amount of uranium resources in the volcanic basin proved about X ten thousand tons,which occupy the important position in the uranium resources and is the important base of uranium development in our country.With the continuous development of computer 3d visualization technology,3d geological modeling technology is becoming more and more mature.This paper based on the mentor-undertaken"Longcan Project"corpus project of the nuclear group.Through comprehensive geological interpretation of AMT data,identifying the structure characteristic of deep geological factors from the key exploration area in east of Zoujiashan in Xiangshan.Under the GOCAD software platform,established the 3d model of geological elements to achieve geology,geophysical information and the 3d visualization of deep geological structure elements of the key exploration area in east of Zoujiashan.This study has following achievements and recognition:?1?This paper collected the related geology,geophysical information and the data of the key exploration area in east of Zoujiashan,including exploration area AMT line?point?data,drilling data,the contour data,exploration area geological map data and remote sensing image raster data.On the basis of the data,processing the data and analysis,establishing AMT data interpretation section of the key exploration area in east of Zoujiashan,building the drilling database of the exploration area,and realizing the related data of 3d visualization.?2?The interpretation section of geophysical-geological established by revising the AMT data inversion section,clipping and revising geological map and calculating and projecting geological drilling exposure points,and integrating into the MapGIS platform.?3?This paper uses the MapGIS platform as the relying platform of AMT data geophysical and geological interpretation.On the basis of knowing the physical property analysis of Xiangshan rock layer,systematically testing and counting rock,dialectically understanding the physical parameters,its variability,geologic knowledge and comprehensive analysis of multiple source information and regarding the gradually accurateinterpretation-inversionstepsastheprincipleofcomprehensive interpretation,then systematically interpreting 55 AMT sections of exploration area.?4?Based on GOCAD three-dimensional geological modeling software platform,regards contour data,the occurrence data of construction,AMT geophysical geological interpretation data as the foundation data for 3d geological modeling.Establishing the key exploration area in east of Zoujiashan surface digital elevation model?DEM?,the fault structural surface,unconformity surface?Qb-K₁?and the interface between groups?K₁d-K₁e?and so on.And established the three-dimensional sgrid model of the exploration area in eastern of Zoujiashan from the surface modeling,including the basement metamorphic rocks?Qb?,the rhyolitic dacite of K₁d and mortar lava solid model of K₁e.?5?Through observation and analysis of the model,combined with the related geological data and mineralization information,some favorable uranium metallogenic factors exist between the unconformity surface and interface between groups of abrupt changing belt,the corresponding exploration can be performed in the abrupt changing belt from the north east Zoujiashan ore deposits,in order to achieve good results.