Disthène et staurotide reliques dans les métapelites du Canigou (Pyrénées orientales). Relations avec les épisodes hercyniens de basse et moyenne pressions

Abstract

Hercynian metamorphism in the axial zone of the Pyrenees is mainly represented by a low-pressure (LP) episode with andalousite–sillimanite, but a later kyanite-bearing medium-pressure (MP) event has been described in the most oriental part of the chain. This article shows that, in the Canigou region, the main episode was preceded by a MP event characterised by a kyanite–staurolite assemblage, which is in agreement with Early Hercynian tangential tectonics. It appears that the low-pressure event has been framed by two medium pressure episodes during the Hercynian evolution.