The very large data set confirms the lithostratigraphic classification based on structural and magmatic field relations. Submitted to Precambrian Research. The calcsilicate rocks of the Banded Migmatite Complex of the Sadh Group proved to bear the most suitable parageneses for P-T calculations. A pressure of 4.6 kb and a temperature of 640deg. This estimation is assigned to the main deformational phase D2.
Microscopic observations suggest that older parageneses have been annealed during that event.
These temperatures probably have to be assigned to deformational phase D1, whereas the values of the Fusht- and Hadbin Complexes rather could be used to calculate the depth of the intrusion than a metamorphic event. The calculated P-T conditions yield a temperature of 650deg. 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.