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Careón ophiolite, NW Spain: Suprasubduction zone setting for the youngest Rheic Ocean fl oor

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Sánchez Martínez, Sonia y Arenas Martín, Ricardo y Díaz García, Florentino y Martínez Catalán, José Ramón y Gómez Barreiro, Juan y Pearce, Julian A. (2007) Careón ophiolite, NW Spain: Suprasubduction zone setting for the youngest Rheic Ocean fl oor. Geology (Boulder Colo.), 35 (1). pp. 53-56. ISSN 0091-7613

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Resumen

The Careón ophiolite (Galicia, NW Iberian Massif) shows lithological and geochemical
features suggestive of an origin in a suprasubduction zone setting. As with other Devonian
ophiolites in the European Variscan belt, it was generated within a contracting Rheic Ocean.
This setting and the general absence of large Silurian-Devonian volcanic arcs on both of the
Rheic Ocean margins strongly suggest that this ocean was closed by intraoceanic subduction
directed to the north. This subduction removed the older normal (N) mid-oceanic-ridge basalt
(MORB) oceanic lithosphere and gave rise to a limited volume of new suprasubduction zone
oceanic lithosphere. The Careón ophiolite is a key element in understanding the evolution of
the Rheic Ocean, which was the main oceanic domain that closed during the Paleozoic convergence
of Gondwana and Laurussia, preceding the assembly of Pangea


Tipo de documento:Artículo
Palabras clave:Devonian ophiolite, Suprasubduction, Galicia, NW Spain, Rheic Ocean
Materias:Ciencias > Geología > Petrología
Código ID:26606
Depositado:04 Sep 2014 09:46
Última Modificación:04 Sep 2014 09:46

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