Dachang Ore Field, Slope Geometry Of Geological Body Modeling And Ore-controlling Condition Quantitative Analysis

This work was related to Guangxi Huaxi Group' s special major project, "The metallogenic prognosis of ChangPo district in Dachang ore-field, Guangxi" . Basing on field study and previous work in the district and applying the theory of "multiple genesis and polygenetic mineralization" , which was created by Professor Chen Guoda,The metallogentic pattern of Dachang tinny-polymetal1ic ore deposit was set up,which was superposed by fore-hyropneumatic and later-magmatic intrusion.In this paper, the author set up special database by analyzing and dealing with the data, which includs drilling data, tunneling data, section view of prospecting line and contour map of magamatic bed.Applying the method of mathematic Geology, space statistics, trending analysis and processing data of special database in self-made program and SPSS, a geological statistical software, I set up geometrical model of geological bodies, including interface model of various adjacent bed, geometrical model of fold, geometrical model of fault, geometrical model of rock body.According to data of special database, the author study the quantitation of vary ore-controlling factors and define quality criteria, consider that the relation between the space distribution of mineralization and stratum, structure, magmatic rock body is relational in some degree. The conclusions are showed in line with previous geological point of view.1, The relation between mineralization and stratum : the master advantaged stratums are large lenticular-1imerock, smal 1 lenticular-limerock,thin-bended-limerock, thick-bended-limerock, s ilicalit and limerock and shale sandwich silicalit.2, The relation between mineralization and structure : the centralized place of the mineralization distribution are drape' s small bended and at a distance form the faultage about 310 miles.3, The relation between mineralization and magmatic-rock: the centralized place of the mineralization distribution of tin and zinc and cuprum is at a distance from the centre of the magmatic-rock' s top about 700 miles; the centralized place of the mineralizationdistribution of plumbum and stibium is at a distance from the centre of the magmatic-rock' s top about 900 miles.