The Analysis Of Sedimentary Facies Of Permian System In Daqing Mountain Of Inner Mongolia

The study area located at western Inner Mongolia Plateau,in Yinshan mountain system Daqingshan mountains,tectonic position under the North China Plate(? level)North China block,Yinshan uplift.North China Taipei crystalline base edge of the development of the Archean rocks Xinghe Group and Ulla rock group granulite facies metamorphic high amphibolite facies and metamorphic Paleoproterozoic lower amphibolite facies.Cambrian and Paleozoic accepted on this basis-Ordovician clastic-carbonate sedimentary assemblage,Carboniferous-Permian coal-bearing clastic sedimentary assemblage of.Zahuai ditch Permian miscellaneous group under the Minister of Sandstone with thin coal seams,fine-grained lithic feldspathic sandstone sandwiched a small amount of another conglomerate;an upper purple calcareous siltstone,medium to coarse grained feldspathic sandstone,green gray sandstone and conglomerate.Naobaogou conglomerate purple,purple and gray conglomerate pebbly sandstones interbedded coarse,pebbly coarse sandstone fuchsia,purple sandstone gray sandstone,purple fine sandstone,shale,purple,green gray pebbly coarse sandstone.On the basis of previous research results,the "Dalaohudian Baotou City,Inner Mongolia Autonomous Region 1: 50000 regional geological survey Mineral Resources" project as the basis,the application of modern sedimentology,stratigraphy,petrology,lithofacies paleogeography science,paleontology,structural geology theory,combining outcrop observation,thin and fossil identification of research tools on the deposition phase Permian strata were analyzed.Sedimentary basin analysis in accordance with the principle of sand body morphology,rock properties,sedimentary structures flag,flag paleontology,sedimentary sequence and other characteristics of a comprehensive study,permian results are summarized in the study area mainly developed delta phase;and further identify the delta front and delta plain of the two sub-phases.Research in this paper for the area sedimentary environment,and further study of sedimentary facies types provided.