See more from this Division: Topical Sessions
See more from this Session: Modes of Lithospheric Extension: Oceanic and Continental Core Complexes
Abstract:
Pelagonian exhumation, beginning by ~ the late Jurassic and continuing into mid-Cretaceous, affected this slab in the following ways: i) The metamorphic facies of the ANM grades from phyllitic to schist and amphibolite-schist over the exhumed Pelagonia. ii) Ophiolites are metasomatized where in contact with the exhumed Pelagonian rocks. iii) Outcrops of remnant ophiolitic fragments are largely disassociated from their original relative positions in their parent slab. iv) No emplacement soles are preserved directly above Pelagonia. East of Vourinos, remnants of the slab were tectonically entrapped between the exhuming Pelagonian core and its sedimentary overburden undergoing extensional, largely gravitational displacements. Deformation of the slab during this entrapment caused rotation of original emplacement vectors (e.g. towards the north, Rodiani near Vourinos). Farther east, primary emplacement features are obscured in serpentinite fragments that show a general westerly topping constriction. In the exhumation model, this "SW topping" direction cannot be interpreted as indicative of an eastern origin of the Pindos Basin ophiolites from the Vardar Zone, but rather as a local response to the uplift of Pelagonia and active deformation of the sedimentary overburden.
See more from this Division: Topical Sessions
See more from this Session: Modes of Lithospheric Extension: Oceanic and Continental Core Complexes