The Metallogenic Prediction Of Meiling-Hongshi-Honghai Cu-Zn Polymetallic Deposit,Xinjiang Province

During the Early Paleozoic time,the Kalatage area in eastern Tianshan experienced significant tectonic changes and mineralization.A series of significant VMS,porphyry and hydrothermal vein Cu-Au-Pb-Zn deposits has been discovered in this metallogenic belt and its outside zones,that has made the Kalatage area become hot points in researchThis paper takes the Meiling-Hongshi-Honghai Cu-Zn polymetallic deposits in middle of Kalatage metallogenic belt as the studied area,and aims to deepen the study of metallogenic model and regularity by 2DGIS multi-source geoscience information extraction and integration.On the basis of this study,3D geological modeling and metallogenic prediction has been devoloped,and aims to discuss the new ideas for synthetic metallogenic prediction and provide favorable evidences for deep prospecting.According to the study of geological and morphology features of typical deposits,with the further development of analysis of pyrite typomorphic characteristics,a new metallogenic model,which VMS type deposit coexists with hydrothermal vein type deposit in Meiling-Honghai mine area,has been established:(1)the Honghai deposit is the VMS type near the crater,whereas Meiling-Hongshi deposit is the hydrothermal vein type in volcanic vent facies and its mineralization ages is later than Honghai deposit,but the three deposits are all controlled by volcanic edifice;(2)the pyroelectricity typomorphic characteristics of pyrite indicate that the mineralization tenperature of Hongshi deposit is between 242.2 and 299.6?,whereas the mineralization temperature of Meiling deposit is between 284.8 and 311.6?;the chemical composition indicates that the metallogenic material source has endogenetic and exogenetic types.Overall,the typomorphic characteristics of pyrie indicate that the Meiling-Hongshi is low-moderate temoerature hydrothermal deposit,and has a complex mineralization process with multi-stages and multi-sources.On the basis of geological,geophysics,geochemical and remote sensing multi-source data,prospecting information is extracted by analyze methods of 2DGIS and mathematic statistics.17 Favorable prospecting targets have been selected by the methods of prospecting-information contents and C-A fractal,including 4 A-grade targets,5 B-grade targets and 8 C-grade targets.According to 2DGIS favorable prospecting targets and the analysis of pyrite pyroelectricity typomorphic characteristics,the Hongshi mine area is put on focus.On the basis of Gocad software and its discrete smooth interpolation method(DSI),3D geological model and deep metallogenic prediction is completed.The 3D geological simulations indicates that the pyrite pyroelectric coefficient transition from high value to low value is the favorable mineralization part,which can be regarded as deep prospecting regularity in the Hongshi mine area.The prediction indicates that the Hongshi No.401 vein's deep mineralization potential is weak,whereas the No.1 and No.9 vein's deep mineralization potential is strong in the southeastern part of Hongshi mine area.