The Early Carboniferous Sedimentary Sequences And Ore-bearing Property Study In Yakeshi Area

This paper studies the the Daxinganling North segment Yakeshi,Carboniferous sedimentary characteristics and geological significance,and get a basic understanding of the Carboniferous ore mineralization analysis of the formation.Lower Carboniferous strata of the Yakeshi region can be divided into red Shui Chuen Group and Moore Root River Group.Hung Shui Chuen group can be divided into two lithologic the next segment is a set-based conglomerate,sandstone,mudstone,the last segment a gray pebbly coarse-grained graywacke,gray fine-grained hard sands stone and gray siltstone interbedded rock.Depositional system,mainly in the shallow continental shelf.The deposition age of DU within the order.Rock Mohr Root River group can be divided into two segments:the lower part of glutenite coastal deposition.Including conglomerate,conglomerate,calcareous sandstone,siltstone,quartz sandstone and limestone lenses.On the carbonate section,the carbonate platform facies,relative to a set of shallow water bioclastic crystalline limestone,there are thin layer of calcareous siltstone or argillaceous rocks.The Carboniferous period is divided into two sequence,respectively,for the red the Shuiquan group sequence SQ1 Mohr Root River group sequence SQ2,SQ1 is divided into five retrogradational parasequence sets and four into the plot parasequence group;the SQ2 is divided into two aggradational parasequence sets,two back the plot parasequence group,and into a plot parasequence sets.Comprehensive study that as early as the Carboniferous Tournaisian period in the late Paleozoic,With the continued subduction of oceanic crust,subduction zones migrate forward,away from the subduction zone Hailar region,due to upwelling of the asthenosphere,the lithospheric extension,thinning,the formation of back-arc basin,and the development of Hung Shui Chuen group,Moore root River group arc basin deposition.Yakeshi region Mohr Root River group of Cu,Au and Zn in background value,the ore-bearing rocks are mainly mafic volcanic rocks,Cu local close to grade,mineralized layer control may back-arc basin during the formation of the seabed hydrothermal jet formed.