| The region in the southwest of He Nan is not only an important part of Chinese major mineralization belt,but also an important polymetallic producing area.It has 12 superior polymetallic metallogenic conditions and rich mineral resources.The paper takes the newly discovered YuKu Mo(W)polymetallic deposit at East Qinling-Dabie Mountain molybdenum mineralization as the main research object.According to the theory of metallogenic series and 3-D modeling method,the paper makes 3-D geological model of ore deposit scale and quantitative evaluation research to the study area.The research result has important reference value on prospection,prediction and evaluation of regional deep ore,and obtains progress and understanding as followed:(1)For the first time,the paper systematically summarizes the regional geological background(strata,structure,and magmatic rocks)ore deposit geological characteristics and metallogenic regularities,and make it chart and streamline.On this basis,the paper combines previous research results and preliminary discusses the metallogenic model.(2)The paper is researched on a comprehensive analysis data for mineral exploration and production information on the YuKu Mo(W)polymetallic deposit accumulated for many years.Referring to the geological data model of famous 3-D software at home and abroad,the paper sets up the comprehensive geological database.According to 3-D modeling technology and method of different geologic body,the 3-D geological modeling process is summarized in primary in this paper.It geologically interprets rock,strata,structures by using Micromine and ArcGIS software to a combination.and sets up concealed rock mass model,structure model,formation models in the study area.In the end,the paper respectively expounds rock,structure,stratum and so on 3-D geological model expressed by the geologic features and significance.(3)In view of the 3-D orebody modeling,firstly,the paper puts forward deposit spatial data model and orebody modeling workflow based on summarizing the predecessors' research achievements,and establishes ore deposit geology database.Through the establishment of ore deposit geology database and the geological data,drilling data and exploration line profile information,the paper geologically interprets the molybdenum body of YuKu and ShiBaoGou areas,and respectively establishes 3-D molybdenum ore body model,.At last,through the rock,structure,formation,orebody comprehensive 3-D geological model,it has picked up information of the single solution or prospecting marks to the 3-D prospecting prediction.It intuitively shows rock,strata,structure of the study area and the spatial distribution of the ore bodies and the space position restriction relationship between each other,and then for the analysis of prospecting prediction,deposit genesis and metallogenic mechanism provided the scientific basis.(4)According to the theory of geostatistics,on the basis of statistical analysis on molybdenum grade element,orebody block model and search ellipsoid,selected distance power inverse ratio method and closed polyhedron method for YuKu Mo(W)molybdenum polymetallic deposit body for the resource estimation,verification has been accurately molybdenum reserves. |
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