THE TECTONOSTRATIGRAPHIC UNITS AT THE NORTHERN FOOT OF THE DABIE MOUNTAINS

The tectonostratigraphic system at the northern foot of the Dabie Mountains can be dividedinto four basic units, that is Guimei accretionary and collisional complex,the Guishan tectonos-tratigraphic unit,the Xinyang Group low-grade metamorphic unit and the Sujiahe tectonos-tratigraphic unit. The evolution history of these tectonic units demonstrate the orogenic develop-ment from the collisional stage to the stage of intracontinental shearing. The change and displace-ment of deformational styles of different tectonostratigraphic units give a simple tectonic modelwhich shows that deformation migrated from the orogcnic root toward the foreland basin.