DYNAMIC MECHANISM OF NAPPE STRUCTURES IN THE SOUTHWEST OF FUJIAN PROVINCE—TAKING THE GUANGPING NAPPE STRUCTURE AS AN EXAMPLE

Nappe structures spread widely in the southwest of Fujian Province.There are 2 basic types:decoupling decollement and thrust nappe.The middle-deep thrust nappe structure in Guangping is part of nappe structures in the southwest of Fujian.Its generation and evolution,influenced by plate tectonic dynamic backgrounds in southwestern Fujian and even the whole Fujian and China,have experienced 6 stages:Hercynian intracontinental lifting(D₃-P₂);early Indo-Chinese extension decollement-compression deformation gliding(T_1-2);late Indo-Chinese synclinal structure generation(T₃);early Yanshanian early lifting and late thrust nappe(J_1-2);late Yanshanian early lifting and erosion and late differential settlement(J₃-K);and Himalayan uplift-erosion(E-Q).