大别山南部的低级变质岩:宿松群和张八岭群

LOW-GRADE METAMORPHIC ROCKS IN SOUTHERN DASBIE MT.: THE SUSONG AND ZHANGBALING GROUP

大别山南部的浅变质岩指宿松群和张八岭群。前者为扬子大陆被动边缘沉积,不整合在扬子大陆晚元古代的结晶基底之上,后者为古大别洋的洋壳,它和北部浅变质岩佛子岭群和梅山群一起,与洋壳俯冲造山带主要构造单元有良好的对应关系。

The low-grade metamorphic rocks in southern Dabie Mt.refer to Susong and Zhangbaling Groups.The Susong Group is a sequence of the Yangtze passive continental sediments,which unconformably overlies the crystalline basement of the Yangtze craton-the Dabie complex.The Zhangbaling Group is documented to be the oceanic crust of ancient Dabie Ocean plate,which together with the shallow metamorphic rocks in northern Dabie Mountains fairly consists with the major tectonic elements of a subduction orogen.