Isotopic chronology and geological events of Precambrian complex in Taihangshan region

There are five major geological events in Precambrian complex, Taihangshan region determined by researching into geology and isotopic chronology of th e complex. Basaltic magma erupted and quartz-dioritic to tonalitic magma in truded in earlier neo-archaean, which formed horn-blende-plagiogneiss of Fu ping gneiss complex and metamorphic mafic rock enclaves in TTG gneiss compl ex. Granulite facies metamorphism and emplacement of biotite-plagiogneiss o ccurred in late neo-Archaean. Extension and uplifting from the end of neo-a rchaean to Paleoproterozoic era formed Chengnanzhuang large extensional def ormation zones and metamorphic mafic veins emplaced into the deformation zo nes. Remobilization of Precambrian complex and tectonic uplifting in late P aleoproterozoic era formed Longquanguan ductile shear zone and emplacement of Nanying gneiss. Occurrence of regional granite pegmatite at the end of P aleoproterozoic era means the end of the Luliang movement.