The Study On Three-dimensional Visualization Of Mineralization-alteration Systems In Shizishan Ore Field In Tongling Ore Concentration Area

Nowadays,limited and insufficient mine resources constrain the economic profits in China.Under the situation,a new round of mining exploration focused on deep and edge spaces has being carried out step by step.While three-dimensional visualization of ore deposits under mining districts can be a shortcut of exploration.Therefore,on basis of the current study on three-dimensional geological modeling, this thesis selects the Shizishan ore field mineralization - alteration systems in Tongling ore concentration area as objective area,sets up drill hole database in Rockworks software, according to the collection of borehole data.Subsquently,the three-dimensional modeling of the Shizishan orefield mineralization - alteration system is implemented,including the stratigraphy,lithology,mineralization types,alteration types,filler veins,fluid on the activity of rock to express the three-dimensional visualization and so on.Eight kinds of major mineralization types and altered rock,filler veins,fluid space activity relationship is visualized,using three-dimensional visualization techniques like transparency of the model and the cutting section.Through the establishment of the "three-dimensional geological model of physical space in Shizishan orefield mineralization - alteration system", the spatial distribution of the ore body shape of mineralization-alteration of three-dimensional system is analyzed visually,and knowledge-based interactive geological ore body modeling is implemented from the perspective of three-dimensional visual representation.The main results of the works are as follows:(1) Using Rockworks software,three-dimensional visualization of the rock models in the Shizishan ore field such as stratigraphy,lithology,mineralization,altered rock,filling veins,and fluid-related activity is set up.(2) Based on the extablished three-dimensional model of the Shizishan orefield mineralization - alteration,the relationship between eight kinds of major ore minerals and altered rock,filler veins,fluid space activity is analyzed from the perspective of three-dimensional visual representation..(3) In shizishan Ore field,copper(polymetal) mineralization-related alteration (metamorphism) follows by the magnitude of the correlation to:skarnization＞skarnization＞kaolinisation＞mamorization＞potash alteration＞hornfelsic＞chloritization.(4) In shizishan Ore field,filler vein related to copper(polymetal) mineralization is in accordance with correlation as follows:calcite veins＞feldspar - quartz vein＞quartz-sulfide veins＞sulphide veins.(5) In shizishan Ore field,Copper(polymetal) mineralization is closely related to fluid activity,and co-exists with skarn-layered.(6) The mineralization types indicating prospective pyrite and chalcopyrite in Shizishan ore field is discussed from the aspect of three-dimensional spatial analysis.