Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8034
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dc.contributor.authorallLigi, M.; CNR-ISMAR Bolognaen
dc.contributor.authorallBonatti, E.; CNR-ISMAR Bolognaen
dc.contributor.authorallBortoluzzi, G.; CNR-ISMAR Bolognaen
dc.contributor.authorallCipriani, A.; CNR-ISMAR Bolognaen
dc.contributor.authorallCocchi, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.authorallCaratori Tontini, F.; GNS Scienceen
dc.contributor.authorallCarminati, E.; Università di Roma "La Sapienza"en
dc.contributor.authorallOttolini, L.; CNR -Paviaen
dc.contributor.authorallSchettino, A.; Università di Camerinoen
dc.date.accessioned2012-09-04T10:14:15Zen
dc.date.available2012-09-04T10:14:15Zen
dc.date.issued2012-08-18en
dc.identifier.urihttp://hdl.handle.net/2122/8034en
dc.description.abstractWe obtained areal variations of crustal thickness, magnetic intensity, and degree of melting of the sub- axial upwelling mantle at Thetis and Nereus Deeps, the two northernmost axial segments of initial oceanic crustal accretion in the Red Sea, where Arabia is separating from Africa. The initial emplacement of oceanic crust occurred at South Thetis and Central Nereus roughly $2.2 and $2 Ma, respectively, and is taking place today in the northern Thetis and southern Nereus tips. Basaltic glasses major and trace element com- position suggests a rift-to-drift transition marked by magmatic activity with typical MORB signature, with no contamination by continental lithosphere, but with slight differences in mantle source composition and/or potential temperature between Thetis and Nereus. Eruption rate, spreading rate, magnetic intensity, crustal thickness and degree of mantle melting were highest at both Thetis and Nereus in the very initial phases of oceanic crust accretion, immediately after continental breakup, probably due to fast mantle upwelling enhanced by an initially strong horizontal thermal gradient. This is consistent with a rift model where the lower continental lithosphere has been replaced by upwelling asthenosphere before continental rupturing, implying depth-dependent extension due to decoupling between the upper and lower lithosphere with man- tle-lithosphere-necking breakup before crustal-necking breakup. Independent along-axis centers of upwell- ing form at the rifting stage just before oceanic crust accretion, with buoyancy-driven convection within a hot, low viscosity asthenosphere. Each initial axial cell taps a different asthenospheric source and serves as nucleus for axial propagation of oceanic accretion, resulting in linear segments of spreading.en
dc.language.isoEnglishen
dc.publisher.nameAmerican Geophysical Unionen
dc.relation.ispartofGeochemistry Geophysics Geosystemsen
dc.relation.ispartofseries8/13 (2012)en
dc.subjectRed Seaen
dc.subjectGravity and Magneticsen
dc.subjectmagma genesis and partial meltingen
dc.subjectmantle processesen
dc.subjecttransition from continental to oceanic riften
dc.titleBirth of an ocean in the Red Sea: Initial pangsen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberQ08009en
dc.subject.INGV04. Solid Earth::04.03. Geodesy::04.03.04. Gravity anomaliesen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.04. Marine geologyen
dc.subject.INGV04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomaliesen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.04. Plate boundaries, motion, and tectonicsen
dc.identifier.doi10.1029/2012GC004155en
dc.description.obiettivoSpecifico2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attiveen
dc.description.obiettivoSpecifico3.3. Geodinamica e struttura dell'interno della Terraen
dc.description.journalTypeJCR Journalen
dc.description.fulltextpartially_openen
dc.relation.issn1525-2027en
dc.contributor.authorLigi, M.en
dc.contributor.authorBonatti, E.en
dc.contributor.authorBortoluzzi, G.en
dc.contributor.authorCipriani, A.en
dc.contributor.authorCocchi, L.en
dc.contributor.authorCaratori Tontini, F.en
dc.contributor.authorCarminati, E.en
dc.contributor.authorOttolini, L.en
dc.contributor.authorSchettino, A.en
dc.contributor.departmentCNR-ISMAR Bolognaen
dc.contributor.departmentCNR-ISMAR Bolognaen
dc.contributor.departmentCNR-ISMAR Bolognaen
dc.contributor.departmentCNR-ISMAR Bolognaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.contributor.departmentUniversità di Roma "La Sapienza"en
dc.contributor.departmentCNR -Paviaen
dc.contributor.departmentUniversità di Camerinoen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna e Lamont Doherty Earth Observatory, Columbia University-
crisitem.author.deptLamont Doherty Earth Observatory, Columbia University-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.deptConsiglio Nazionale delle Ricerche—Istituto di Geoscienze e Georisorse (IGG), Sezione di Pavia, 27100 Pavia, Italy-
crisitem.author.deptDipartimento di Scienze della Terra, Università di Camerino-
crisitem.author.orcid0000-0002-5098-5907-
crisitem.author.orcid0000-0001-7835-1116-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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