CHARACTERISTICS OF THE HEFEI JURASSIC BASIN AND ITS SEDIMENTARY RESPONSE TO THE DABIESHAN OROGENIC BELT

Characteristics of the Hefei Jurassic Basin and the Dabieshan Orogenic Belt have been studied from the aspect of basin-and-range coupling in this paper.With the second uplifting of the Dabieshan Mountain,the northern fringe of the Dabieshan Mountain underwent the strongest subsidence and sedimentation in the early Jurassic and then the Hefei Jurassic Foreland Basin was formed.Afterwards,the subsidence-sedimentation process slowed down gradually in the south of the Hefei Basin in the Middle-Late Jurassic without any strengthening phenomenon.The authors also briefly introduce the sediment characteristics of the Jurassic Formation in different areas of the Hefei Basin.On this basis,the sedimentary response to the Dabieshan Orogenic Belt of the Hefei Jurassic Basin is studied thoroughly from the aspects of basin structure,clastic matrix constituents of sediments,sequence architecture and sedimentary system,and so on.The study demonstrates that these two things are coupling very well.