GEOMORPHOTECTONIC FEATURES OF THE DABIESHAN AREA, CHINA

Some geomorphotectonic types observed in eastern Dabieshan area and its neighborhood are described in this paper. They include trellis drainage pattern, graben valley, faulted block mountain, dislocation basin, valley kink point, and incised meander, as well as faulted triangular facets and trapezoidal facets etc. The development of multiple beveling planes occurring in the area under investigation may be subdivided into three different stages, i.e. Dabie stage (Late Jurassic), Huoshan stage (Early Tertiary) and Huainan stage (Pliocene-Pleistocene). Some major geomorphotectonic types related to recent seismic activities and their evolution are preliminarily discussed here.It is revealed that the different geomorphotectonic types and their developmental history are controlled by some faulted zones with various trends and different degree of activity. Consequently, the existence of multiple beveling planes as well as the appearance of recent seismic activities and neotectonic faulting are closely associated with the revival of old faults.