Submitted to Contributions to Mineralogy and Petrology. The two-mica gneisses of the latter show a slight crustal contaminated influence, whereas the amphibolites of the Juffa Group and all complexes of the Sadh Group show the same model ages and the same isotopic characteristics typical of an island arc setting. Sm-Nd model ages propose an older age for the Juffa gneisses, whereas the calcsilicates from the Banded Migmatite Complex are not different than the other Sadh rocks. Only the newly discovered calcsilicates in the bt-gneisses of the Banded Migmatite Complex point to an at least partly sedimentary origin of the Sadh Group. The rocks of the Juffa Group are geochemically clearly separable from the Sadh Group.
Geochemical comparisons suggest greywackes as origin for the dominant two-mica gneisses.
New discrimination diagrams assign them an intermediate- to felsic provenance in an island arc setting. Submitted to Lithos. Deformation phase D1 must be treated separately for the Sadh- and the Juffa Group. P-T determinations show higher values for the latter which is in conflict with the much higher abundance of migmatites in the Banded Migmatite Complex of the Sadh Group. The parageneses of these rocks probably have been overprinted by the likewise high-tempered deformation phase D2, which is defined through the juxtaposition of the two groups.