By I.R. Finetti
This publication offers and discusses new info starting from Alps to Africa, acquired through the CROP venture (transcrustal seismic exploration of the Mediterranean and Italy). New lithospheric imagings of correct value for figuring out disputed subject matters are supplied. Alps, Apennines, Calabrian Arc, Sicilian Apennine, Maghrebian Chain, Corso-Sardinian Block, paleo-basins (Ionian, Alpine Tethys), neo-basins (Balearic and Tyrrhenian) are innovatively reconstructed.
* offers new info from the Alps to Africa
* offers interpretation of the CROP seismic community data
* deals a stepwise raise in info with new info for additional experiences
Read Online or Download CROP Project, Volume 1: Deep Seismic Exploration of the Central Mediterranean and Italy (Atlases in Geoscience) PDF
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Additional resources for CROP Project, Volume 1: Deep Seismic Exploration of the Central Mediterranean and Italy (Atlases in Geoscience)
The shots were located offshore (Sicily Channel, South Tyrrhenian, Gulf of Taranto and Adriatic Sea) and recorded by land-based stations at Pantelleria, Sicily, the Aeolian islands, Calabria and the Salentina peninsula. Section 11a shows a crustal thickness of about 18 km under the Aeolian islands. Beneath Calabria the same situation observed in section 9 occurs. In fact, the whole Calabrian stretch of the section is characterised by a crust-mantle boundary at a depth of about 20–25 km, while under the Ionian coastline the evidence for a deeper discontinuity at a depth of 40 km is clear.
The depth of the crust-mantle boundary in the Tyrrhenian Sea shows two minima (9 and 11 km), corresponding respectively to the Vavilov and Marsili sea-mounts. Between these two areas, there is a broad subsided zone where the Moho is over 20 km deep. Towards the NW end of the section (Baronie) the crust thickens as the continental structure of the SardinianCorsican block is approached. At the opposite end, the crust is relatively thin (between 14 and 20 km), both in the southern Tyrrhenian and beneath Calabria.
Plotted are the traces of the twelve interpretative crustal cross-sections described in this chapter. ) The arrows represent the direction and ages of drift and last orogenic transport: 1 – Pliocene-Pleistocene, 2 – Middle-Upper Miocene, 3 – Oligocene–Lower Miocene. 1). It must be noted that they are based upon data of uneven quantity and quality and, therefore, the reliability of the interpretation is not uniform throughout the area. This is also apparent looking at the density of transepts (Figures 2 and 3) which is higher where networks of profiles based on a larger number of shotpoints are available.