Integrated Information Prognosis Of Sliver Polymetallic Mineral Resources In The Shaxilate Area, Inner Mongolia

The study area of Shaxilate is located in the eastern part of the late Paleozoic accretion-type orogen in the southern part of the Great Xing'an Mountains,which is affected by the paleo-Asian Ocean structural domain,the Mongolia-Okhotsk structural domain and the circum Pacific structural domain,forms a complex geological structure and therefore has good metallogenic conditions.In the southern part of the Great Xing'an Mountains,the formations formed during the process of the Permian submarine volcanism and hydrothermal exhalation are rich in many useful elements,which are the source beds of many deposits in this region.Regional tectonic framework,which consists of the new NE structure and basement EW structure,controls the spatial distribution of most deposits.The late Mesozoic magmatism provided the main thermal and material sources for mineralization and made the regional mineralization reach the peak in this stage.Based on the comprehensive comparative study of the geological characteristics of the Shuangjianzishan typical deposits and research area,this paper summarizes research results of metallogenic regularity in the Great Xing'an Mountains,comprehensively analyzes the collected geological,geophysical and geochemical data,generalizes geological metallogenetic conditions and prospecting indicators,establishes a comprehensive information mineral prediction and prospecting model to indicate the direction for the future prospecting work.Ore bodies in the research area are hosted in the phyllitic slate of Shoushangou Formation and controlled by the EW structure.The ore mainly has allotriomorphic grain framework and metasomatic framework.The ore structure is massive,vein and disseminated.The metal minerals in the ore are mainly galena,sphalerite,chalcopyrite,natural silver.The alteration of surrounding rock is dominated by medium and low temperature alteration,including silicification,carbonation,chloritization,sericitization.The ore body characteristics of the reaserch area are similar to those of the Shuangjianzishan deposit,which means ore bodies in the research area similarly belong to the medium and low temperature hydrothermal vein type deposit.The analytical results of 1:10000 soil geochemical data in the study area show that the standard deviation,coefficient of variation and concentration Clarke value of Ag,Pb,Zn and Sn elements are relatively high,which indicates these elements have great prospection potential.By the factor analysis and cluster analysis of ore-forming elements,Ag,Pb,Zn and Sn elements respectively belong to the Ag-Au-As-Sb and Pb-Zn-Sn assemblages,which hints Ag and Pb-Zn-Sn are different types of mineralization.There are 63 single element anomalies of Ag,Pb and Zn in the whole area,of which Ag-3,Ag-12,Pb-2,Pb-10,Zn-1 and Zn-19 have high intensity,large contrast and obvious concentration center and have good metallogenic potential.According to spatial coupling of different single element anomalies,four combined anomalies are delineated.HT-1,Ht-3 and Ht-4 combined anomalies include a few single element anomaly with excellent metallogenic potential,such as Ag-3,Pb-2,cocsist of anomalies with good spatial coupling and consequently are important geochemical prospecting indicators in the research area.After reduction to the pole,the high-precision magnetic anomalies in the reasearch area changes from positive in the north to negative in the sorth and from intensive in the west to gentle in the east.According to the continuation of different heights,12 circular structures and 42 linear structures are interpreted in the study area,of which the NE linear structures dominate structural framework of the research area.The intersection of positive and negative fields and the intersection of different types of structures,which coincide with the discovered ore bodies and the center of single element abnormal concentration,are the important magnetic prospecting indicators in the research area.The results of IP intermediate gradient survey manifest that the apparent resistivity decreases from west to East,while the apparent polarizability increases.The low resistivity and high polarizability anomalies are important electrical prospecting indicators.Based on the data of geology,geophysics and geochemistry,a comprehensive information mineral prediction model is established.One first class prediction area,two second class prediction area and two prospecting targets are selected in order to provide scientific direction for the future exploration work.