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Introduction Research on eclogite-facies provinces during the last

Summary: 373
Research on eclogite-facies provinces during the last
decades has focused on the ultrahigh-pressure meta-
morphic state and mechanisms for exhuming rocks from
extreme pressure conditions. The Western Gneiss Region
(WGR) in western Norway is one of the world's largest
eclogite-facies provinces and experienced high-pressure
(HP) to ultrahigh-pressure (UHP) metamorphism dur-
ing Caledonian continent-continent collision in Late
Silurian to Early Devonian time (Smith 1984, Griffin et
al. 1985, Dobrzhinetskaya et al. 1995, Wain 1997), gen-
erally referred to as the Scandian orogeny (Gee 1975).
The WGR is interpreted to represent the exhumed parts
of the root zone of the Scandian orogen (e.g., Griffin et
al. 1985, Andersen et al. 1991, Roberts 2003, Tucker et al.
2004, Hacker & Gans 2005). A number of publications
have suggested regional models to explain exhumation
of the HP terrane (e.g., Dewey et al. 1993, Krabbendam
& Dewey 1998, Labrousse et al. 2002, Hacker et al. 2003,


Source: Andersen, Torgeir Bjørge - Centre for Physics of Geological Processes & Department of Geosciences, Universitetet i Oslo


Collections: Geosciences