Show simple item record

dc.contributor.authorCastro Dorado, Antonio 
dc.contributor.authorFernández Rodríguez, Carlos 
dc.contributor.authorRosa Díaz, Jesús de la 
dc.contributor.authorMoreno-Ventas Bravo, Ignacio 
dc.contributor.authorRogers, Graeme
dc.identifier.citationCastro Dorado, C., Fernández Rodríguez, C., Rosa Díaz, J. de la, Moreno-Ventas Bravo, I.: "Significance of MORB-derived Amphibolites from the Aracena Metamorphic Belt, Southwest Spain". Journal of Petrology. Vol. 37, n. 2, p. 235-260 (1996). ISSN 1460-2415en_US
dc.description.abstractThe Aracena metamorphic belt, in the southwest Iberian Massif, is characterized by the presence of MORB-derived amphibolites and continental rocks deformed and metamorphosed during the Hercynian orogeny. Geochemical relationships of these amphibolites indicate the existence of a multiple fractionation process from a set of parental magmas, implying the existence of a multi-chamber system beneath the ridge where the basalt protolith was extruded. Neodymium isotopic ratios are typical of MORB, and oxygen isotopes indicate that these amphibolites have been derived from the uppermost part of the oceanic crust Thermal evolution, revealed from the study of chemical variations in the amphibole chemistry, is interpreted as resulting from subduction in a low-pressure regime in which the thermal structure of the continental hanging-wall played an important role. This continental wall was previously heated by subduction of a slab window resulting from migration of a triple junction along the continental edge during plate convergence. Three petrologic arguments support this tectonic model These are: (1) the low-pressure inverted metamorphic gradient of amphibolites of the oceanic domain; (2) the high-temperaturelow- pressure metamorphism of the continental hanging wall; (3) the early intrusion of boninites into the continental domain.en_US
dc.publisherOxford University Pressen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.subject.otherHercynian belteng
dc.subject.otherInverted metamorphic gradienteng
dc.titleSignificance of MORB-derived Amphibolites from the Aracena Metamorphic Belt, Southwest Spainen_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 España
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España

Copyright © 2008-2010. ARIAS MONTANO. Repositorio Institucional de la Universidad de Huelva
Contact Us | Send Feedback |