The Zentralgneise of the Tauern Window (Eastern Alps): Insight into an Intra-Alpine Variscan Batholith

摘要: Geological, petrographic and geochemical data of the “Zentralgneise” (central gneisses) Tauern window (Eastern Alps) are presented. The rocks interpreted as metamorphosed formation late Palaeozoic granitoids, which once formed a batholitic terrain on southern flank Variscan orogen. primary structures this its plutonic evolution investigated. Field evidence suggests that activity set in with widespread anatexis pre-existing continental crust Viseau to early Namurian, during series K2O-rich magmas dominantly granitic, but also syenitic monzonitic compositions were produced. Subsequently, large volumes calc-alkaline I-type granitoids intruded (dominantly granodiorites tonalites). Most Zentralgneise represent such rocks. A generation leucocratic granites approaches within-plate (A-type) composition. change magma-types time is accompanied by rapid uplift terrain. Plate tectonic implications for orogen discussed.