Emplacement of the lyngdal granodiorite (SW Norway) at the brittle-ductile transition in a hot crust.

Michel Bogaerts (1) , Bruno Scaillet (2) , Jacqueline Vander Auwera (1)

1 L.A. Géologie, Pétrologie et Géochimie
2 ISTO - Institut des Sciences de la Terre d'Orléans

The 1.0–0.9 Ga plutons of the HBG suite (Hornblende-Biotite Granitoids) associated with the Rogaland anorthosites belong to the Sveconorwegian post-collisional magmatism in southwestern Norway. The comparison between experimental and natural phase equilibria indicates that the Lyngdal granodiorite (HBG suite) crystallized between 4 and 2 kbar, the magma having 6 wt% H2O in melt at early stages and an fO2 in the range NNO/NNO+1 (Bogaerts et al., 2002).

Domaines: Volcanologie

Michel Bogaerts, Bruno Scaillet, Jacqueline Vander Auwera. Emplacement of the lyngdal granodiorite (SW Norway) at the brittle-ductile transition in a hot crust.. Geophysical Research Abstracts, 2003, Nice, France. pp.Vol.5, 03611. ⟨hal-00084666⟩