Abstract
Metamorphic variations in the Scandinavian Caledonides are related to the general constitution of the orogen as a sequence of nappes emplaced upon the Baltic foreland. In the central and eastern belts, the present pattern of regional metamorphism largely coincides with the nappe pattern, and multiply metamorphosed, high-grade units of Precambrian or Caledonian age are locally juxtaposed with low-grade units. The basement below the nappes has been increasingly involved in the Caledonian orogeny northwestwards, where inclusions of ecrlogite in the gneisses indicate pressures related to a doubling of the crust.
The metamorphism probably took place during various climactic events from the Late Precambrian to Upper Devonian time. The most important were related to subduction/ocean closure during the Ordovician to Cambrian and continental collision in the Late Silurian.
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© 1983 D. Reidel Publishing Company, Dordrecht, Holland
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Bryhni, I. (1983). Regional Overview of Metamorphism in the Scandinavian Caledonides. In: Schenk, P.E., Haworth, R.T., Keppie, J.D., Trzcienski, W.E., Williams, P.F., Kelling, G. (eds) Regional Trends in the Geology of the Appalachian-Caledonian-Hercynian-Mauritanide Orogen. NATO ASI Series, vol 116. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7239-1_19
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