Ongoing lithospheric removal in the western Mediterranean: Evidence from Ps receiver functions and thermobarometry of Neogene basalts (PICASSO project)

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dc.citation.firstpage1113en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitleGeochemistry, Geophysics, Geosystemsen_US
dc.citation.lastpage1127en_US
dc.citation.volumeNumber15en_US
dc.contributor.authorThurner, Sallyen_US
dc.contributor.authorPalomeras, Immaen_US
dc.contributor.authorLevander, Alanen_US
dc.contributor.authorCarbonell, Ramonen_US
dc.contributor.authorLee, Cin-Tyen_US
dc.date.accessioned2016-01-28T18:32:41Zen_US
dc.date.available2016-01-28T18:32:41Zen_US
dc.date.issued2014en_US
dc.description.abstractThe western Mediterranean tectonic system consists of the Betic Mountains in southern Spain and the Rif Mountains in northern Morocco curved around the back-arc extensional Alboran basin. Multiple tectonic models have been developed to explain the coeval compressional and extensional tectonic processes that have affected the western Mediterranean since the Oligocene. In order to provide constraints on these evolutionary models, we use Ps teleseismic receiver functions (RF), thermobarometric analyses of post-Oligocene basalts, and previous teleseismic tomography images to investigate the lithospheric structure of the region. Ps RFs were calculated using seismic data from 239 broadband seismic stations in southern Iberia and northern Morocco and thermobarometric analysis was performed on 19 volcanic samples distributed throughout the region. The RF images reveal a highly variable Moho depth (∼25 to ∼55 km), as well as a strong positive, sub-Moho horizon between ∼45 and ∼80 km depth beneath the central Betic and Rif Mountains, which we interpret to be the top of the previously imaged Alboran Sea slab. Thermobarometric constraints from magmas in the eastern Betics and Rif indicate mantle melting depths between 40 and 60 km, typical of melting depths beneath mid-oceanic ridges where little to no lithosphere exists. Together, the RF and thermobarometric data suggest ongoing and recent slab detachment resulting from delamination of the continental lithosphere.en_US
dc.identifier.citationThurner, Sally, Palomeras, Imma, Levander, Alan, et al.. "Ongoing lithospheric removal in the western Mediterranean: Evidence from Ps receiver functions and thermobarometry of Neogene basalts (PICASSO project)." <i>Geochemistry, Geophysics, Geosystems,</i> 15, no. 4 (2014) American Geophysical Union: 1113-1127. http://dx.doi.org/10.1002/2013GC005124.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/2013GC005124en_US
dc.identifier.urihttps://hdl.handle.net/1911/88227en_US
dc.language.isoengen_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordGibraltar Arcen_US
dc.subject.keywordreceiver functionsen_US
dc.subject.keywordlithospheric delaminationen_US
dc.subject.keywordBetic Mountainsen_US
dc.titleOngoing lithospheric removal in the western Mediterranean: Evidence from Ps receiver functions and thermobarometry of Neogene basalts (PICASSO project)en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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