Geochronologische und geochemische Diskussion der sog. „Flüelagranitischen Assoziation" des Silvrettakristallins (Graubünden/ Schweiz)

The rock-types of the «Fluelagranitic Association» can be classified as metamonzo- to metasyenogranites of S-type character. The different orthogneiss types bear a volcanic-arc signature. Sm-Nd-model-ages between 1.2 and 1.7 Ga for several gneiss types indicate special crustal mixing processes