Provenance Characteristics Of Nantun Formation In Baer Depression And Its Dominate Of The Depositional System

Fine depicting of antiquity source environment is of great significance of depositional systems restoration, finding the dominant sandstone development zone and forecasting exploration target areas. This paper uses data such as palaeo-geomorphology, seismic attributes, heavy minerals and sandstone present, to analyse and depict the source system of Nantun Formation sedimentary period from different angles and levels. It shows that the provenance of Nantun period in Baer Depression is mainly from the slope zone around the depression and low bulges in the basin, converging from the basin to the center. The direction of the main source of N1 and N2 sedimentary period have obviously inheritance. There are 9 major source systems in Nantun formation of Baer depression which is developing sedimentary environment such as fan dalta and sublacustrine facies.