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dc.contributor.authorGil, Alba
Gallart, Josep
Diaz, Jordi
Carbonell, Ramon
Torne, Montserrat
Levander, Alan
Harnafi, Mimoun
dc.date.accessioned 2015-01-08T14:55:02Z
dc.date.available 2015-01-08T14:55:02Z
dc.date.issued 2014
dc.identifier.citation Gil, Alba, Gallart, Josep, Diaz, Jordi, et al.. "Crustal structure beneath the Rif Cordillera, North Morocco, from the RIFSIS wide-angle reflection seismic experiment." Geochemistry, Geophysics, Geosystems, (2014) American Geophysical Union: http://dx.doi.org/10.1002/2014GC005485.
dc.identifier.urihttps://hdl.handle.net/1911/78903
dc.description.abstract The different geodynamic models proposed since the late 1990s to account for the complex evolution of the Gibraltar Arc System lack definite constraints on the crustal structure of the Rif orogen. Here we present the first well-resolved P-wave velocity crustal models of the Rif Cordillera and its southern continuation toward the Atlas made using controlled-source seismic data. Two 300+ km-long wide-angle reflection profiles crossed the Rif along NS and EW trends. The profiles recorded simultaneously five land explosions of 1Tn each using ~850 high frequency seismometers. The crustal structure revealed from 2-D forward modeling delineates a complex, laterally varying crustal structure below the Rif domains. The most surprising feature, seen on both profiles, is a ∼50 km deep crustal root localized beneath the External Rif. To the east, the crust thins rapidly by 20 km across the Nekkor fault, indicating that the fault is a crustal scale feature. On the NS profile the crust thins more gradually to 40 km thickness beneath Middle Atlas and 42 km beneath the Betics. These new seismic results are in overall agreement with regional trends of Bouguer gravity and are consistent with recent receiver function estimates of crustal thickness. The complex crustal structure of the Rif orogen in the Gibraltar Arc is a consequence of the Miocene collision between the Iberian and African plates. Both the abrupt change in crustal thickness at the Nekkor fault and the unexpectedly deep Rif crustal root can be attributed to interaction of the subducting Alboran slab with the North African passive margin at late Oligocene-early Miocene times.
dc.language.iso eng
dc.publisher American Geophysical Union
dc.rights Article 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.title Crustal structure beneath the Rif Cordillera, North Morocco, from the RIFSIS wide-angle reflection seismic experiment
dc.type Journal article
dc.contributor.funder National Science Foundation
dc.citation.journalTitle Geochemistry, Geophysics, Geosystems
dc.subject.keywordseismic profiling
Western Mediterranean
Rif Cordillera
crustal structure
Moho depth variations
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1002/2014GC005485
dc.identifier.grantID EAR0808939 (National Science Foundation)
dc.type.publication publisher version


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