Remote Sensing Analysis Of Geological Structure In Dishuiquan Area,NE Junggar Basin,Xinjiang,China

The Dishuiquan area is located in the northeastern margin of the Junggar Basin and the western margin of Kelameili Mountain.The Early Carboniferous thick marine sedimentary stratigraphic system exposed in this area is rich in tectonic phenomena and has developed thick and high quality marine source rocks.Comprehensive geological research in this area,especially the analysis of geological structures,is of great significance both for regional tectonic geological evolution and the study of the Carboniferous oil-bearing strata.This paper selects a variety of remote sensing image data such as World View-2,ETM+,and Google Earth,performs image preprocessing,and establishes a variety of geological information identification marks.The stratum,geological structure and volcanic rock wall of the study area were identified and analyzed.On this basis,field investigations were carried out.The main conclusions are as follows:(1)By preprocessing the three types of remote sensing images,the geological identification marks are established and the recognition degree is divided,which provides support for the extraction and analysis of geological information such as stratum and geological structure in the study area.(2)A group of compound synclines and compound anticlines in the NWW direction are mainly developed in the Dishuiquan Formation,and asymmetric folds between the layers appear on their wings.The wings of the folds were cut and reformed by a set of NW-oriented strike-slip fault systems,together they constitute the geometric combination of structural deformation at this stage.There are neutral or mafic volcanic rock wall groups in the area,which have a mainly NW direction,cutting off the structural deformation of the Lower Carboniferous.(3)The results of field survey show that after the closure of the ancient Asian Ocean,a basin was formed by tectonic extension,and the Dishuiquan Formation was deposited during the squeezing process of the basin,followed by tectonic deformation.At the same time,the age of the volcanic rock wall group in the study area limits the time of structural deformation of the Lower Carboniferous Dishuiquan Formation to the end of the Early Carboniferous,and the volcanic rock wall group appears in the new extensional environment after the compression deformation.