The Tongbai orogenic belt(TOB)is composed of six tectonic units.From south to north these units are:Tongbai gneiss rise(TGR);Hongyihe-Luozhuang eclogite belt(HLE);Ma-opo-Hujiazhai igneous rock belt(MHI);Zhoujiawan flysch belt(ZFB);Yangzhuang greenschist belt(YGB);and Dongjiazhuang marble belt(DMB).The geometry and kinematic images of the TOB in-clude:the antiformal structures caused by a later uplift process,the top-to-north ductile shear struc-ture that related to a process that the ultrahigh pressure rocks are brought to surface,the top-to-south ductile shear thrust and the sinistrial shear structures related to a south-north direction compression,and the east-west direction fold structures in the upper crust.In the view of the multistage subduc-tion-collision orogenic belt,according to the characters of petrology and its distribution,geometry,kinematics and structural chronology in these tectonic units,tectonic evolution of the TOB can be divided into four stages:oceanic crust subduction during 400―300 Ma,continental collision during 270―250 Ma,continental deep subduction and uplift during 250―205 Ma and doming deformation during 200―185 Ma.
