Summary
A rock belonging to the Bamble formation (granulite facies of Southern Norway) is defined in this paper as amphyclasite. The outcrop studied is situated near the village of Brat on the Tromøy island (Arendal district). The amphyclasite is almost monomineralic and contains, besides the prevailing amphibole, garnet and plagioclase. The chemical analyses of the rock, of the amphibole and of the garnet are reported along with the physical properties of amphibole and garnet.
Résumé
L'objet de ce travail est une roche de la province du Bamble (facies granulite, Norvège Meridionale). L'affleurement étudié se trouve dans l'ile de Tromøy, près du village de Brat (province d'Arendal). L'association minerale dans cette roche est composée presque totalement par l'amphibole, avec du plagioclase et du granat en quantité subordonnée. La composition et les caractéristiques phisiques de ces minéraux ont été établies par l'analyse chimique et le rayons X.
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Comin-Chiaramonti, P., Frangipane, M. The amphyclasite of Brat (Tromøy, Southern Norway). TMPM Tschermaks Petr. Mitt. 21, 280–290 (1974). https://doi.org/10.1007/BF01081036
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DOI: https://doi.org/10.1007/BF01081036