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A Restored section of the ‘‘southern Variscan realm’’ across the Corsica–Sardinia microcontinent

Rossi, Philippe and Oggiano, Giacomo and Cocherie, Alain (2009) A Restored section of the ‘‘southern Variscan realm’’ across the Corsica–Sardinia microcontinent. Comptes rendus. Geosciences, Vol. 341 (2-3), p. 224-238. ISSN 1631-0713. Article.

Full text not available from this repository.

DOI: 10.1016/j.crte.2008.12.005

Abstract

A complete section of the southern realm of the Variscan orogenic belt can be restored in the Corsica–Sardinia segment. Northern Corsica exposes a nonmetamorphosed Palaeozoic succession lying on Panafrican mica schist related to a microcontinent (most likely Armorica or from a microcontinent from the Hun superterrane) that had drifted away directly from Gondwana. These formations are thrust over the Variscan Internal Zone composed mainly of anatectic high-grade Palaeozoic formations that crop out from central Corsica to northern Sardinia; the metamorphic peak of the eclogite remnants has been dated at c. 420 Ma. The Variscan Internal Zone interpreted here as a collision zone, and also the Eovariscan suture, was intruded in Corsica by Mg–K granite from 345 to 335 Ma. The thrust of this Internal Zone onto the stack of parautochthonous nappes in central Sardinia is cross-cut by the Posada Asinara dextral shear zone. To the south, parautochthonous nappes overthrust the North-Gondwana margin which displays a possible Panafrican basement topped by an Iglesiente–Sulcis nonmetamorphic/anchimetamorphic Palaeozoic succession.

Item Type:Article
ID Code:4770
Status:Published
Refereed:Yes
Uncontrolled Keywords:Variscan orogenic belt, Southern Variscan realm, Corsica, Sardinia
Subjects:Area 04 - Scienze della terra > GEO/03 Geologia strutturale
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Elsevier Masson
ISSN:1631-0713
Copyright Holders:© 2008 Académie des sciences
Deposited On:05 Nov 2010 10:31

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