Kyanite in the Hercynian metamorphic rocks of the Oporto-Viseu belt, North Portugal

Abstract

Kyanite and garnet have been found in some metamorphosed rocks of the so-called low-pressure Oporto-Viseu belt of the Older Hercynian granites, Portugal. Reassessment of the nature of the metamorphism is therefore necessary, as well as its relation to the higher pressure, Barovian metamorphic belt to the west (Oliveira de Azemeis).