TECTONIC EVOLUTION FRAMEWORK AND NATURE OF THE WEST QINLING OROGENIC BELT

In this paper tectonic evolution,framework and nature of the West Qinling Orogenic Belt after Phanerozoic Phhave been discussed Since about 800 MaPB,the West Qinling Orogenic Belt underwent breakup of supercontinent,evolution of ocean and continent,collisional orogeny,withinplate stretching and incontinental overprinted orogeny,and presentday West Qinling Orogenic Belt has been eventually completed During diffirent tectonic evolutional stages,the West Qinling Orogenic Belt has various tectonic style and framework In the evolution stage of ocean and continent,its tectonic style belongs to plate tectonics,and it is charecterized by framework of ocean and continent In withinplate stretching stage,its tectonic style belongs to a withinplate rift and faultsubsiding basin,and it is charecterized by a framework of sea and continent In incontinental overpritined orogenic stage,its tectonic style belongs to incontinental basinmauntain style,it is charecterized by an incontinental basinmountain framework Therefore the West Qinling Orogenic Belt is a "collisionincontinental type"complex orogenic belt