BACKGROUND AND PROTOTYPE OF THE MESO-CENOZOIC BASINS IN HEXI CORRIDOR REGION

Many different types (prototype) of Meso-Cenozoic basins have been formed in Hexi Corridor region on Qilian Caledonian folded basement in a long-term N-S compression environment since Indosinian Movement. The fomation, distribution and structure of basins were controlled by mass accretion, oceanic crust subduction and inplate deformation induced by phrase terrane collision in Neo-Tethys Ocean, and also closely related with Qilian fold system and the inhomogeneous intracontinent block activities in /between adjacent land masses. The different inplate deformation mechanism in the different periods of Cenozoic and different stages of basin formation dominated the development of different types and styles of basins (prototype).