Lithostratigraphic framework on the southern margin of the Su-Lu orogen

The authors systematically summarizes the recent progress in the regional survey on the southern margin of the Su-Lu orogen.The Donghai complex may be divided into the Neo-archean to Paleopro-terozoic Donghai Group-complex and metamorphosed intrusive rocks.The Donghai Group-complex con-sists of the Maobei,Yanmachang,Wuqiangshan,Hushan and Motianling Formation-complexes.The meta-granitic rocks may fall into early-stage areal intrusions and late-stage isolated intrusions.Ultrabasic inclusions in meta granitic rocks fall into the NW-trending Xugou rock belt and SE-trending Jiangzhang-Gangshang rock belt.The metamorphic complex occurs as a number of NE-and E-W-trending blocks.The ultra-high-pressure(UHP )metamorphic blocks may be divided into four rock slices.The dense ductile shear zones occurred in three stages and the late stage witnessed overlapping of Indosinian detachment ductile shear zones of formation of complex ductile shear systems.