Discussion on the thinkings and methods of prototype basin and its superposed process——taking example of Yongmei basin

As a negative tectonic units,Basin records the process of basin subsiding and orogenic belt evolution of the same period. The original appearance, formation and deformation ofspace spreading and arrangement reacts regional power direction and property. The superposition and history of different period prototype basin directs regional tectonic evolution. On the basis of the bringing forward and actuality of prototype basin, this paper discusses the content, idea, method and meaning of prototype basin and its superposed process. Prototype of Yongmei basin is foreland basin in west side during Early-middle Triassic. However it is foreland basin in east side from late Triassic to middle Jurassic. Prototype and it's superposed of Yongmei basin show the evolution process of regional tectonics in Fujian and Guangdong province from Early-middle Triassic to middle Jurassic. The study shows that Prototype Basin and it's Superposed is essential for the region tectonic evolution.