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

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dc.citation.firstpage140
dc.citation.issueNumber1
dc.citation.journalTitleGeochemistry, Geophysics, Geosystems
dc.citation.lastpage160
dc.citation.volumeNumber15
dc.contributor.authorPalomeras, I.
dc.contributor.authorThurner, S.
dc.contributor.authorLevander, A.
dc.contributor.authorLiu, K.
dc.contributor.authorVillasenor, A.
dc.contributor.authorCarbonell, R.
dc.contributor.authorHarnafi, M.
dc.date.accessioned2016-01-28T18:32:41Z
dc.date.available2016-01-28T18:32:41Z
dc.date.issued2014
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.
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.
dc.identifier.doihttp://dx.doi.org/10.1002/2013GC004861
dc.identifier.urihttps://hdl.handle.net/1911/88228
dc.language.isoeng
dc.publisherAmerican Geophysical Union
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.
dc.subject.keywordwestern Mediterranean
dc.subject.keywordRayleigh wave tomography
dc.subject.keywordsubduction
dc.titleFinite-frequency Rayleigh wave tomography of the western Mediterranean: Mapping its lithospheric structure
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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