000032484 001__ 32484 000032484 005__ 20180622111519.0 000032484 0248_ $$2sideral$$a86640 000032484 037__ $$aART-2013-86640 000032484 041__ $$aspa 000032484 100__ $$0(orcid)0000-0002-2745-0357$$aGalé, C.$$uUniversidad de Zaragoza 000032484 245__ $$aVulcanismo cuaternario de la Isla Decepción (Antártida): Una signatura relacionada con la subducción de la Fosa de las Shetland del Sur en el dominio de tras-arco de la Cuenca de Bransfield 000032484 260__ $$c2013 000032484 5060_ $$aAccess copy available to the general public$$fUnrestricted 000032484 5203_ $$aDeception Island shows a volcanism related to the Phoenix Plate subduction and roll-back under South Shet- land Block in the present times. The development of the island is related to the evolution and collapse of a volcanic caldera, and this study is focused on the petrology, mineralogy and geochemistry of the post-caldera rocks. We have made a study of the lava flows, dikes and the youngest historic eruption in 1970. These rocks range from dacite to rhyolite and have a microporphyritic texture with olivine and minor clinopyroxene. A pre-caldera basaltic andesite has also been studied. It has a microporphyritic texture with clinopyroxene.The intermediate and acid compositions alternating in the volcanostratigraphic sequence suggest either mafic recharge events or melt extraction from different levels in the deep magmatic system. All the studied compo- sitions share a subduction-related signature similar to other magmatics from the Bransfield Basin. However, compositional differences between pre-caldera and post-caldera rocks indicate a different magma source and depth of crystallisation. According to the geothermobarometric calculations the pre-caldera magmas started to crystallise at deeper levels (13.5–15 km) than the post-caldera magmas (6.2–7.8 km). Specifically, the post- caldera magmas indicate a smaller influence of the subducting slab in the southwestern part of the Bransfield Basin in respect to the available data from other sectors as well as the involvement of crustal contamination in the genesis of the magmas. 000032484 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/CTM2011-13902-E$$9info:eu-repo/grantAgreement/ES/MINECO/CTM2011-26372$$9info:eu-repo/grantAgreement/ES/MINECO/CTM2011-30241-C02-02 000032484 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000032484 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000032484 700__ $$0(orcid)0000-0002-2944-8736$$aUbide, T. 000032484 700__ $$0(orcid)0000-0002-3609-7380$$aLago, M.$$uUniversidad de Zaragoza 000032484 700__ $$0(orcid)0000-0001-6110-1081$$aGil-Imaz, A.$$uUniversidad de Zaragoza 000032484 700__ $$aGil-Peña, I. 000032484 700__ $$aGalindo-Zaldívar, J. 000032484 700__ $$aRey, J. 000032484 700__ $$aMaestro, A. 000032484 700__ $$aLópez-Martínez, J. 000032484 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDepartamento de Ciencias de la Tierra$$cGeodinámica Interna 000032484 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDepartamento de Ciencias de la Tierra$$cPetrología y Geoquímica 000032484 773__ $$g125, 1 (2013), 31-52$$pBol. Geol. Min.$$tBoletin Geologico y Minero$$x0366-0176 000032484 85641 $$uhttp://www.igme.es/Boletin/2014/125_1.htm$$zTexto completo de la revista 000032484 8564_ $$s999112$$uhttps://zaguan.unizar.es/record/32484/files/texto_completo.pdf$$yVersión publicada 000032484 8564_ $$s103775$$uhttps://zaguan.unizar.es/record/32484/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000032484 909CO $$ooai:zaguan.unizar.es:32484$$particulos$$pdriver 000032484 951__ $$a2018-06-22-11:08:58 000032484 980__ $$aARTICLE