The Sedimentology Analysis Of Aiweiergou Jurassic Period Basin In Xinjiang And The Evolution Compare With Junggar Jurassic Period Basin

Because of particular structure position of the Aiweiergou Jurassic period basin, so make it deeper means to study this basin. It is Junggar Plate that northern Middle-Tianshan, Aiweiergou Jurassic period basin is situate in Hasakesitan- Junggar plate in structure position, Junggar Jurassic period basin is situate in middle of Junggar Plate, and Aiweiergou Jurassic period basin just exist in edge of Junggar plate. We obtain some conclusions, by practical work in field, collect data, analysis in lab and study existence information, as follows: Firstly, the area of Aiweiergou Jurassic system is made by two deposition stages in a depositional cycle from attitude of paleoenvironment and tectonic movement. Deposition I stage deposited Badaowan Formation ,Sangonghe Formation of Lower Jurassic Period, Xishanyao Formation of middle Jurassic period, developed river channel deposition of warm and humid, deltaic deposit and lake- deltaic deposit. Deposition II stage developed alluvial fan of Toutunhe Formation of middle Jurassic period in arid environment. Aiweiergou Jurassic period basin is a fault basin ,in Jurassic period, Aiweiergou fault basin had experienced two large scale lake reback , one large scale lake corrade and one small scale lake corrade. Secondly,Tianshan orogenic belt becoming post-orogenic extensional stage after Permian, made the edge of Junggar faulted, resulted in Aiweiergou Jurassic period fault basin , Aiweiergou Jurassic Period Basin had existed in fourth stage-Mesozoic and Cenozoic from attitude of deposition structure environment, the area is obviously show that southern uplift and northern fault depression, northern differential settlement, all denude and elevation ,Tianshan developed finally .According to compare Aiweiergou Jurassic period basin with Junggar Jurassic period basin, we can say that they are basin developed from Junggar plate, they have similar deposition environment ,deposition character , paleoclimate character and comparable Jurassic coal stratum. From the above, we concluded that Aiweiergou Jurassic period basin and Junggar Jurassic period basin are one basin.