Activities History of Zhenyuan-Guiyang Fault Belts and Constraint on the Evolution of Centre Guizhou Uplift

By a comprehensive research of the contrast sedimentary,magma activities,the characteristics analysis of macrostructure and microstructure and the temperature measured by fluid of both sides of the Zhenyuan-Guiyang Faults Belts leads to the conclusion that the faults had existed before the early Paleozoic.It is normal-slip to SSE in the Duyun movement at the end of the Middle Ordovician,and shear clockwise and normal-slip in the Guangxi movement at the turn of the end of the Silurian and the beginning of the Devonian.The dating of lamproite near Zhenyuan area,(261.3±8) Ma,shows the faults extension again in Dongwu movement between the Guadalupian and the Lopingian of Permian.The faults also underwent comprehensive evolution process in the Mesozoic and Cenozoic,including several times of dextral shear in the early Yanshanian from the early Jurassic to the early Cretaceous,anticlockwise shear and intensively squeeze in the late Yanshanian from the late Cretaceous to the Oligocene,and the squeezing in the Himalayan period since Miocene.Several activities of the faults belts were also found in early Paleozoic constraint on the evolution of the southeast margin of the Centre Guizhou Uplift directly.