| The study area tectonically located in the Beishan late VARISCIAN geosyncline fold belt(IV 1)Ulam Hu Hai depression in the middle(IV 110),tsagganchuluut Da romvi fault in North Central south.In the area exposed strata mainly in Archean metamorphic rocks of the Wulashan group and Paleozoic Carboniferous of the Bartle group,A Mu group,Bayan mountain Mesozoic Cretaceous Gobi group,Su Hongtu group,Wu Su Hai group,and Cenozoic quaternary.Fold structures are mainly found in Palaeozoic strata,and fracture structures are mainly distributed in the central part,mainly from east to west and north to west.The magmatic activity in the area is obviously controlled by tectonics and characterized by polycyclic characteristics.During the Proterozoic,late Mesozoic and Mesozoic,tectonic movements were frequent and violent,and corresponding cycles of magmatic rocks were also developed.The genetic types of regional metallic minerals are mainly hydrothermal veins,followed by skarn type.The hydrothermal vein deposit is generally formed in the upper Carboniferous Bartle formation.The spatial distribution of mineralization is controlled by brittle fracture,fracture structure or ductile brittle deformation structure.The rocks are fractured,polymorphic,cataclastic and breccia.This kind of mineralized surface is mainly brown iron ore,malachite fossil vein and occasionally chalcopyrite.Mineralization is generally distributed in the far outer contact zone between the rock mass and the surrounding rock.The skarn deposit in Carboniferous and Permian in more acidic intrusive and Upper Carboniferous in the Bartle group,A Mu hill group of carbonate rocks,metamorphic clastic rocks contact zone structure,skarnized often Beaded distribution along the contact zone.The main ore deposits are skarn type copper iron ore.The mineralized bodies are massive and vein distributed,and accompanied by strong Huang Tie mineralization.The mineralization intensity is generally positively related to the skarn strength.The whole study area is on the background of quiet negative magnetic field,and some irregular magnetic anomalies appear locally.This study selected 9 key anomalies 1:5 million high-precision ground magnetic anomaly inspection,examination results and aeromagnetic anomaly shape and location of the basic line,some anomalies and geochemical anomalies fit better,and found that the alteration in line inspection of abnormal clues.Through 1:50000 soil geochemical survey in the study area,the area of each geological unit element background values and anomaly characteristics are summarized and expounded the elements in different geological body in the study zone of the distribution and enrichment characteristics.The enrichment of the element in the carboniferous strata have the As,Sb,Ni,Au,Cu,etc;Gobi group of lower cretaceous in the enrichment of the elements of W and B;Early cretaceous is enriched in suhongtu group elements such as Fe,Co,Ni,V.Of As,Sb,Hg,Au,W,Mo,Fe,Cr,Ni,Cu and other elements in the area and the surrounding geological enrichment,variability is bigger,for mineralization favorable elements.Based on this circle the synthetical geochemical anomalies of 30.The spatial distribution of mineral resources in the study area is mainly controlled by tectonics,ore control structure and distribution characteristics of magmatic rocks.In this work,the direct or indirect prospecting indicators of formation,structure,wall rock alteration,geophysics and geochemistry are analyzed and summarized,and the prospecting models of skarn and hydrothermal vein deposits are established.Based on geological background,temporal and spatial distribution of various minerals in the area,ore controlling conditions and geochemical anomaly distribution characteristics and other factors,the regional metallogenic prediction,delineate copper lead zinc,copper and molybdenum,iron polymetallic 10 prospecting areas,one of which 1,two 4,three grade 5,provides an important basis for further prospecting work. |
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