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The 1998-2001 submarine lava balloon eruption at the Serreta ridge (Azores archipelago): constraints from volcanic facies architecture, isotope geochemistry and magnetic data

2017-01Journal article Restricted access
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dc.contributor.authorMadureira, Pedro Miguel
dc.contributor.authorRosa, Carlos
dc.contributor.authorMarques, Ana Filipa
dc.contributor.authorSilva, Pedro
dc.contributor.authorMoreira, Manuel
dc.contributor.authorHamelin, Cedric
dc.contributor.authorRelvas, Jorge
dc.contributor.authorLourenço, Nuno
dc.contributor.authorConceição, Patrícia
dc.contributor.authorde Abreu, Manuel Pinto
dc.contributor.authorBarriga, Fernando J. A. S.
dc.date.accessioned2017-03-14T10:20:57Z
dc.date.available2017-03-14T10:20:57Z
dc.date.issued2017-01
dc.description.abstractThe most recent submarine eruption observed offshore the Azores archipelago occurred between 1998 and 2001 along the submarine Serreta ridge (SSR), similar to 4-5 nautical miles WNW of Terceira Island. This submarine eruption delivered abundant basaltic lava balloons floating at the sea surface and significantly changed the bathymetry around the eruption area. Our work combines bathymetry, volcanic facies cartography, petrography, rock magnetism and geochemistry in order to (1) track the possible vent source at seabed, (2) better constrain the Azores magma source(s) sampled through the Serreta submarine volcanic event, and (3) interpret the data within the small-scale mantle source heterogeneity framework,that has been demonstrated for the Azores archipelago. Lava balloons sampled at sea surface display a radiogenic signature, which is also correlated with relatively primitive (low) He-4/He-3 isotopic ratios. Conversely, SSR lavas are characterized by significantly lower radiogenic Sr-87/Sr-86,Pb-206/Pb-204 and Pb-208/Pb-204 ratios than the lava balloons and the onshore lavas from the Terceira Island. SSR lavas are primitive, but incompatible trace-enriched. Apparent decoupling between the enriched incompatible trace element abundances and depleted radiogenic isotope ratios is best explained by binary mixing of a depleted MORB source and a HIMU-type component into magma batches that evolved by similar shallower processes in their travel to the surface. The collected data suggest that the freshest samples collected in the SSR may correspond to volcanic products of an unnoticed and more recent eruption than the 1998-2001 episode. (C) 2016 Elsevier B.V. All rights reserved.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citation1998-2001 submarine lava balloon eruption at the Serreta ridge (Azores archipelago): Constraints from volcanic facies architecture, isotope geochemistry and magnetic data. Journal of Volcanlogy and Geothermal Research. ISSN 0377-0273. Vol. 329 (2017), pp. 13-29pt_PT
dc.identifier.doi10.1016/j.jvolgeores.2016.11.006pt_PT
dc.identifier.issn0377-0273
dc.identifier.issn1872-6097
dc.identifier.urihttp://hdl.handle.net/10400.21/6853
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://ac.els-cdn.com/S0377027316304449/1-s2.0-S0377027316304449-main.pdf?_tid=673aedf8-089f-11e7-85ad-00000aacb360&acdnat=1489486818_d3bb955c5111a23d55601166853cbd28pt_PT
dc.subjectAzores archipelagopt_PT
dc.subjectSerreta submarine eruptionpt_PT
dc.subjectLava balloonspt_PT
dc.subjectROVpt_PT
dc.subjectHe-Sr-Nd-Pb isotopespt_PT
dc.subjectRock magnetismpt_PT
dc.titleThe 1998-2001 submarine lava balloon eruption at the Serreta ridge (Azores archipelago): constraints from volcanic facies architecture, isotope geochemistry and magnetic datapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage29pt_PT
oaire.citation.startPage13pt_PT
oaire.citation.titleJournal of Volcanology and Geothermal Researchpt_PT
oaire.citation.volume329pt_PT
person.familyNameMadureira
person.familyNameSilva
person.familyNamemoreira
person.familyNameRelvas
person.givenNamePedro Miguel
person.givenNamePedro
person.givenNamemanuel
person.givenNameJorge
person.identifier1232178
person.identifier.ciencia-idBD11-66D7-5BC3
person.identifier.ciencia-idC314-1157-FD0C
person.identifier.ciencia-id4C1A-C35F-BE25
person.identifier.orcid0000-0003-4762-6273
person.identifier.orcid0000-0002-9178-3623
person.identifier.orcid0000-0001-5845-4660
person.identifier.orcid0000-0003-1228-2247
person.identifier.ridB-8512-2008
person.identifier.ridH-5329-2017
person.identifier.ridC-6427-2013
person.identifier.scopus-author-id24503642500
person.identifier.scopus-author-id55431034700
person.identifier.scopus-author-id15119407000
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationece1fd98-1fe8-4861-9bf9-918edcedbd9f
relation.isAuthorOfPublication54c96e27-8c3a-42d9-b751-ebc637c2f478
relation.isAuthorOfPublication0a3ca64c-99e3-4e72-86f6-98f271b33ff0
relation.isAuthorOfPublication67e67244-8ab9-4cfb-a10e-725f281f9dd3
relation.isAuthorOfPublication.latestForDiscovery67e67244-8ab9-4cfb-a10e-725f281f9dd3

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