The Composition,Tectonic Framework and Evolution of Qinling Complex, Central China
秦岭杂岩的组成、构造格局及演化

Qinling complex is composed of metamorphic stratas, orthogneisses, gneisses unknown their types of original rocks, marble blocks unknown their ages and ophiolite slices. The stratas can be disintegrated into Qinling rock group and Xiahe rock group. The tectonic framework of the complex is characterized by oblique arrangement of three lenticular tectono stratigraphic blocks, showing NW direction tectonic line. The metamorphic terrane was formed in tectonic setting of the subduction collision in the north Qinling in late Proterozoic era, developing NNW direction tectonic framework, and then intensely reworked during plastic uplifting in Paleozoic era, characterized by NNW direction tectonics, and lately elevated into surface tectonic level as a whole terrane, superposed by EW direction brittle ductile shear zones. The character of the evolution of the complex reveal the feature of the state of the regional tectonics and moving direction of tectonic blocks in different periods.