Finite-frequency Rayleigh wave tomography of the western Mediterranean: Mapping its lithospheric structure

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dc.citation.firstpage140en_US
dc.citation.issueNumber1en_US
dc.citation.journalTitleGeochemistry, Geophysics, Geosystemsen_US
dc.citation.lastpage160en_US
dc.citation.volumeNumber15en_US
dc.contributor.authorPalomeras, I.en_US
dc.contributor.authorThurner, S.en_US
dc.contributor.authorLevander, A.en_US
dc.contributor.authorLiu, K.en_US
dc.contributor.authorVillasenor, A.en_US
dc.contributor.authorCarbonell, R.en_US
dc.contributor.authorHarnafi, M.en_US
dc.date.accessioned2016-01-28T18:32:41Zen_US
dc.date.available2016-01-28T18:32:41Zen_US
dc.date.issued2014en_US
dc.description.abstract[1] We present a 3-D P wave velocity model of the crust and shallowest mantle under the Italian region, that includes a revised Moho depth map, obtained by regional seismic travel time tomography. We invert 191,850 Pn and Pg wave arrival times from 6850 earthquakes that occurred within the region from 1988 to 2007, recorded by 264 permanent seismic stations. We adopt a high-resolution linear B-spline model representation, with 0.1° horizontal and 2 km vertical grid spacing, and an accurate finite-difference forward calculation scheme. Our nonlinear iterative inversion process uses the recent European reference 3-D crustal model EPcrust as a priori information. Our resulting model shows two arcs of relatively low velocity in the crust running along both the Alps and the Apennines, underlying the collision belts between plates. Beneath the Western Alps we detect the presence of the Ivrea body, denoted by a strong high P wave velocity anomaly. We also map the Moho discontinuity resulting from the inversion, imaged as the relatively sharp transition between crust and mantle, where P wave velocity steps up to values larger than 8 km/s. This simple condition yields an image quite in agreement with previous studies that use explicit representations for the discontinuity. We find a complex lithospheric structure characterized by shallower Moho close by the Tyrrhenian Sea, intermediate depth along the Adriatic coast, and deepest Moho under the two mountain belts.en_US
dc.identifier.citationPalomeras, I., Thurner, S., Levander, A., et al.. "Finite-frequency Rayleigh wave tomography of the western Mediterranean: Mapping its lithospheric structure." <i>Geochemistry, Geophysics, Geosystems,</i> 15, no. 1 (2014) American Geophysical Union: 140-160. http://dx.doi.org/10.1002/2013GC004861.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/2013GC004861en_US
dc.identifier.urihttps://hdl.handle.net/1911/88228en_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.keywordwestern Mediterraneanen_US
dc.subject.keywordRayleigh wave tomographyen_US
dc.subject.keywordsubductionen_US
dc.titleFinite-frequency Rayleigh wave tomography of the western Mediterranean: Mapping its lithospheric structureen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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