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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 and Arenas Martín, Ricardo and Díaz García, Florentino and Martínez Catalán, José Ramón and Gómez Barreiro, Juan and 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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Abstract

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


Item Type:Article
Uncontrolled Keywords:Devonian ophiolite, Suprasubduction, Galicia, NW Spain, Rheic Ocean
Subjects:Sciences > Geology > Petrology
ID Code:26606
Deposited On:04 Sep 2014 09:46
Last Modified:04 Sep 2014 09:46

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