Seismic structure of the Central Tyrrhenian basin: Geophysical constraints on the nature of the main crustal domains (Articolo in rivista)

Type
Label
  • Seismic structure of the Central Tyrrhenian basin: Geophysical constraints on the nature of the main crustal domains (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/2013JB010527 (literal)
Alternative label
  • (Prada, M.[ 1 ] ; Sallares, V [ 1 ] ; Ranero, CR [ 2 ] ; Vendrell, MG [ 1 ] ; Grevemeyer, I [ 3 ] ; Zitellini, N [ 4 ] ; de Franco, R [ 5 ] (2014)
    Seismic structure of the Central Tyrrhenian basin: Geophysical constraints on the nature of the main crustal domains
    in Journal of Geophysical Research
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • (Prada, M.[ 1 ] ; Sallares, V [ 1 ] ; Ranero, CR [ 2 ] ; Vendrell, MG [ 1 ] ; Grevemeyer, I [ 3 ] ; Zitellini, N [ 4 ] ; de Franco, R [ 5 ] (literal)
Pagina inizio
  • 52 (literal)
Pagina fine
  • 70 (literal)
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  • 119 (literal)
Rivista
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  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • [ 1 ] CSIC, ICM, Barcelona Ctr Subsurface Imaging, ES-08003 Barcelona, Spain [ 2 ] CSIC, ICM, Barcelona Ctr Subsurface Imaging, ICREA, ES-08003 Barcelona, Spain [ 3 ] GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany [ 4 ] CNR, Ist Sci Marine, I-40126 Bologna, Italy [ 5 ] CNR, Ist Dinam Proc Ambientali, I-20133 Milan, Italy (literal)
Titolo
  • Seismic structure of the Central Tyrrhenian basin: Geophysical constraints on the nature of the main crustal domains (literal)
Abstract
  • In this work we investigate the crustal and tectonic structures of the Central Tyrrhenian back-arc basin combining refraction and wide-angle reflection seismic (WAS), gravity, and multichannel seismic (MCS) reflection data, acquired during the MEDOC (MEDiterraneo OCcidental)-2010 survey along a transect crossing the entire basin from Sardinia to Campania at 40 degrees N. The results presented include a similar to 450km long 2-D P wave velocity model, obtained by the traveltime inversion of the WAS data, a coincident density model, and a MCS poststack time-migrated profile. We interpret three basement domains with different petrological affinity along the transect based on the comparison of velocity and velocity-derived density models with existing compilations for continental crust, oceanic crust, and exhumed mantle. The first domain includes the continental crust of Sardinia and the conjugate Campania margin. In the Sardinia margin, extension has thinned the crust from similar to 20km under the coastline to similar to 13km similar to 60km seaward. Similarly, the Campania margin is also affected by strong extensional deformation. The second domain, under the Cornaglia Terrace and its conjugate Campania Terrace, appears to be oceanic in nature. However, it shows differences with respect to the reference Atlantic oceanic crust and agrees with that generated in back-arc oceanic settings. The velocities-depth relationships and lack of Moho reflections in seismic records of the third domain (i.e., the Magnaghi and Vavilov basins) support a basement fundamentally made of mantle rocks. The large seamounts of the third domain (e.g., Vavilov) are underlain by 10-20 km wide, relatively low-velocity anomalies interpreted as magmatic bodies locally intruding the mantle. (literal)
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