A P-wave velocity model of the upper crust of the Sannio region (Southern Apennines, Italy) (Articolo in rivista)

Type
Label
  • A P-wave velocity model of the upper crust of the Sannio region (Southern Apennines, Italy) (Articolo in rivista) (literal)
Anno
  • 1998-01-01T00:00:00+01:00 (literal)
Alternative label
  • Iannaccone, G ; Improta, L ; Capuano, P 1; Zollo, A; Biella, G; De Franco, R; Deschamps, A; Cocco, M; Mirabile, L; Romeo, R (1998)
    A P-wave velocity model of the upper crust of the Sannio region (Southern Apennines, Italy)
    in Annali di Geofisica (1948)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Iannaccone, G ; Improta, L ; Capuano, P 1; Zollo, A; Biella, G; De Franco, R; Deschamps, A; Cocco, M; Mirabile, L; Romeo, R (literal)
Pagina inizio
  • 567 (literal)
Pagina fine
  • 582 (literal)
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  • 41 (literal)
Rivista
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  • 16 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Istituto Nazionale Geofisica e Vulcanologia (INGV) Unicersità Federico II Napoli Italy IRRS CNR Sophia Antipolis CNRS France Istituto Navale Napoli Italy Servizio Sismico Nazionale (literal)
Titolo
  • A P-wave velocity model of the upper crust of the Sannio region (Southern Apennines, Italy) (literal)
Abstract
  • This paper describes the results of a seismic refraction profile conducted in October 1992 in the Sannio region, Southern Italy, to obtain a detailed P-wave velocity model of the upper crust, The profile, 75 km long, extended parallel to the Apenninic chain in a region frequently damaged in historical time by strong earthquakes. Six shots were fired at five sites and recorded by a number of seismic stations ranging from 41 to 71 with a spacing of 1-2 km along the recording line. We used a two-dimensional raytracing technique to model travel times and amplitudes of first and second arrivals, The obtained P-wave velocity model has a shallow structure with strong lateral variations in the southern portion of the profile. Near surface sediments of the Tertiary age are characterized by seismic velocities in the 3.0-4.1 km/s range. In the northern part of the profile these deposits overlie a layer with a velocity of 4.8 km/s that has been interpreted as a Mesozoic sedimentary succession. A high velocity body, corresponding to the limestones of the Western Carbonate Platform with a velocity of 6 km/s, characterizes the southernmost part of the profile at shallow depths. At a depth of about 4 km the model becomes laterally homogeneous showing a continuous layer with a thickness in the 3-4 km range and a velocity of 6 km/s corresponding to the Meso-Cenozoic limestone succession of the Apulia Carbonate Platform. This platform appears to be layered, as indicated by an increase in seismic velocity from 6 to 6.7 km/s at depths in the 6-8 km range, that has been interpreted as a lithological transition from limestones to Triassic dolomites and anhydrites of the Burano formation. A lower P-wave velocity of about 5.0-5.5 km/s is hypothesized at the bottom of the Apulia Platform at depths ranging from 10 km down to 12.5 km; these low velocities could be related to Permo-Triassic siliciclastic deposits of the Verrucano sequence drilled at the bottom of the Apulia platform in the Apulia Foreland. (literal)
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