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Composition and evolution of Branco Island (Cape Verde)

dc.contributor.authorBrändle, José Luis
dc.contributor.authorHernán, Francisco
dc.contributor.authorHuertas, María José
dc.contributor.authorAncochea, Eumenio
dc.date.accessioned2014-07-16T09:36:29Z
dc.date.available2014-07-16T09:36:29Z
dc.date.issued2006
dc.identifier.urihttp://hdl.handle.net/10272/8561
dc.description.abstractThe first data about the composition of lava flows from Branco Island (Cabo Verde) are presented in this work. Most lava flows in the sequence are alkali basalts (Fo84-76 olivine, En44-36 diopside, An83-31 plagioclase) showing geochemical affinity of typical ocean island basalts. The scarce most evolved members are mugearites (olivine absent, En41-31 clinopyroxene, An51-26 plagioclase, and kaersutite). The compositional variations between both the types are explained by crystal fractionation and extraction of pyroxene (up to 29%) and lesser proportions of olivine and Fe and Ti oxides (Cpx: 75; Ol: 21; OxFeTi: 4). The transition to mugearites from the most evolved basalts would mainly be due to extraction of pyroxene (24%) and Fe and Ti oxides (Cpx: 68; Ol: 3; Plag: 5; OxFeTi: 30)en_US
dc.language.isospaen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.otherOceanic islandsen_US
dc.subject.otherBrancoen_US
dc.subject.otherBarlovento Islandsen_US
dc.subject.otherCape Verdeen_US
dc.subject.otherAlkaline basaltsen_US
dc.titleComposición y evolución de las lavas de la isla de Branco (Cabo Verde)en_US
dc.titleComposition and evolution of Branco Island (Cape Verde)eng
dc.typeinfo:eu-repo/semantics/articleen_US
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess


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