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Geodinamica Acta 18/1 (2005) 1–9
Interactions between magmatism and tectonics in Iceland: a review
O. Dauteuil a, *, F. Bergerat b
a RS 6118 Géosciences Rennes, Université de Rennes 1, 35042 Rennes cedex France.
b RS 32 CEPAGE, Université Pierre et Marie Curie, 75252 Paris cedex 05, France.
1. Presentation approximately N130-140° until 35 Ma, then spreading rota-
tion occurred to reach the present-day strike of N104°.
This special Issue of Geodinamica Acta sums up recent During this opening, the spreading rate varies around a mean
studies about the deformation that affects Iceland. Different value of 2 cm/yr with a phase of low velocity during the
approaches are presented to highlight how this island is an change in spreading direction.
exceptional natural laboratory to study interactions between This high magmatic supply is coeval with a stretching
magmatism and extensional tectonics. These interactions exist deformation as the oceanic ridges; however the productivity
in numerous geodynamical contexts as in the oceanic ridges or is largely higher than the oceanic context. Thus, the classical
in the volcanic passive margins. However, Iceland provides models of lithospheric extension cannot be simply applied
an unique opportunity to study this phenomenon on land. because most