Sedimentary Facies And Paleogeography Of The Songliao Basin And Its Peripheral Areas During Carboniferours-Permian Time

In this paper,Songliao Basin and surrounding areas Carboniferous-Permian strata multiple stratigraphic division and comprehensive research are carried on in the use of stratigraphy,paleontology and earth history.In the base of outcrop-based research,combined exploration wells and seismic data in the basin of the basin Carboniferous-Permian comprehensive study,including stratigraphic,lithological,stratigraphic thickness.Single well in the study area and outcrop of sedimentary facies division,and then through the United wells contrast,analysis of the study area horizontal distribution of sedimentary facies.On this basis,petrographic analysis of ancient geography and map compilation are conducted.Through the above studies this paper indicates shallow water environment Carboniferous belong to deepen the sea from north to south;Early Permian Northeast and North China block collision squeeze,lift,did not accept the deposit or eroded;while the-into the Late Permian depression basin stage for shore shallow,fluvial and lacustrine depositional environment.