Metallogenic Prediction Based On3-D Geological Modeling System And Remote Sensing Technologies

The study area is located in the Luanchuan Mo-Pb-Zn multi-ore belt, which isone of the important metallogenic belts in China, and it is a secondary tectonicprovince belonging to the southern margin of North China Plate. Crystalline basementin the ore belt is composed of Taihua Group; sedimentary cover consists ofMesoproterozoic Xionger Group, Neoproterozoic Luanchuan Group, MesoproterozoicGuandaokou, and Sinian Taowan Group, which are constructed of debris andcarbonate rocks and formed the “dual structure”. Combined with the previous studies,Mo-Pb-Zn multi-ore deposits in the Luanchuan metallogenic belt have the magmatichydrothermal metallogeny affinity.Orebody investigation, strata measurement, structure observation and3Dmodeling on pluton and metallogenic prediction assessment is conducted in Chitudianlead-zinc ore district, according to the3D visualization modeling and mathematicalmodeling methods, and the multi-source geological data, including geology,geological engineering, geophysics, geochemistry and remote sensing, etc. mainachievements and remarks are summarized as following:1.According to the analysis on the geological characteristics of the Number S01、S13、S139、S038、S068、S268of the Pb-Zn orebodies in the study area, this studytends to support ore-forming strata are mainly Sanchuan and Meiyaogou formation inLuanchuan Group, which belong to marine terrigenous clastic rocks-carbonatesedimentary construction; NW trending fault is of evident ore-controlling factor,secondary structure, which consist of the NE trending fault, anticlinal core and domalflank trending NE, are favorable for metallogenesis; lead-zinc ore deposits are timeand space related to the Yanshanian granitic plutons which closely associated to Momineralization.2. Based on the metallogenic condition and remote sensing images data, such asSPOT5、ETM+etc, this study extracted information of hydroxyl, iron stainedabnormal and linear-circular tectonic, and confined the favorable prospecting district preliminarily, so as to provide scores on the positioning and quantitative evaluation ofcomprehensive prospecting.3.According to the geology, geological engineering and geophysical multi-sourcedata in the study area, using Micromine software as main tool, this study establishedthe3D modeling combining information of geology, orebody and fault in Chitudiandistrict, with an area of15×10×2.5km3.4.According to the metallogenic characteristic of structure-stratabound-magmatichydrothermal in the study area, this study aims to delineate the favorable prospectingtargets, by comparison with3D lead-zinc orebodies and anomalies of strata, plutons,geophysical data, gravity, magnet, and lead geochemistry, by means of3D modeling3D buffer analysis and Boolean calculation.