| The research area is located in the Duobaoshan-Heihe metallogenic subzone in the eastern part of the Greater Khingan Mountains metallogenic belt.The Nenjiang fault passes through the area and has historically undergone multi-stage superimposed alteration of the mineralization.It is the area of Cu,Au,Mo,W,Pb,Zn and other metals in the favorable metallogenic regions.The strata in the study area are mainly composed of the Upper Proterozoic-Lower Cambrian metamorphic rocks,Paleozoic volcanic-sedimentary rocks,and Mesozoic volcanic rocks.The area is structurally developed,and the “rhombus” formed by the NE and NW trending structures provide favorable conditions for migration and precipitation of metallogenic material.Based on the previous geological work,this study carried out the measurement of 1?50000 soil sediments,analyzed the characteristics of soil geochemistry,explained the evaluation anomalies and analyzed the metallogenic geological conditions by combining ground,material,chemical,and remote methods.Summarize the rules of mineralization,delineate metallogenic prospects,and make recommendations for future work.This study mainly analyzes the elements of Au,Ag,As,Sb,Bi,Cu,Pb,Zn,W,Mo,Sn,Hg,Fe,Co,Ni,Y,La,and Cd.The elements with rich clarke value and coefficient of variation greater than 1 are Au,Ag,As,and Mo,indicating that these four elements are not only rich in ore-forming material sources,but also have a strong superimposed reconstruction function in the later period,which is relatively conducive to mineralization.In particular,the strong heterogeneity of the Au element may be the main metallogenic element in this area,with a large local enrichment potential.Through factor analysis,cluster analysis and correlation analysis,the symbiosis characteristics of the elements were studied,and three groups of element combinations were determined: first,Au-As-Sb-Hg-Sn associated with gold deposits;second,with copper-molybdenum,lead-zinc ore-related Mo-Cu-W-Pb-Zn-Ag-Bi;third is iron ore-related Cd-Fe-Co-Ni-La-Y.A total of 511 single element anomalies and 12 general anomalies were identified in the zone,including one type of B2 type anomaly,four types of B3 type anomaly,and seven types of C type anomaly.The spatial distribution of comprehensive anomalies was related to the geological body and structure.Closely,with the complex composition of abnormal elements,a variety of metallogenic elements closely associated with the characteristics.In terms of mineral resources,the minerals in the study area are mainly related to the Mesozoic Yanshanian geological bodies,especially the Mesozoic magmatic rocks and the Palaeozoic volcanic-sedimentary rock stratigraphy.The characteristics of the deposits and the metallogenic conditions of typical Mesozoic deposits in the region are summarized.Based on the metallogenic geological background in the study area,the metallogenic types in the area can be divided into two types: one is the Cu,Mo skarn deposits associated with the Late Jurassic-Early Cretaceous monzonite;Au polymetallic hydrothermal deposits associated with volcanic activities in the Early Cretaceous.On the basis of comprehensive anomalies and related geological backgrounds,3 metallogenic prospects have been circled,of which,there are 1 class B mineral prospects and 2 C-metallogenic prospects. |
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