Structures and PT determination of the Caledonian metamorphism of the lower part of the Planetfjella Group in the area around Mosseldalen, northern Ny Friesland, Svalbard
The archipelago of Svalbard is a key area for understanding the North Atlantic Caledonides. The pre-Devonian rocks of Svalbard are an assemblage of different terranes, probably juxtaposed by transpression during the Caledonidian orogenesis. Svalbard's Eastern Terrane consists of a thick (c. 18 km) succession, of Paleoproterozoic to Ordavician age, referred to as the Hecla Hoek sequence, and is