Aiello, Gemma and Marsella, Ennio (2012) The stratigraphic setting of continental shelves of southern Italy investigated through seismic stratigraphy: techniques, methodologies and case studies from Campania and Basilicata offshore (southern Tyrrhenian sea). In: Horizons in Earth Science Research. Nova Science Publishers, United States of America. (In Press)
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Abstract
The stratigraphic setting of continental shelves of Southern Italy is here studied and discussed through seismo-stratigraphic techniques and methodologies, focussing on case histories located in Campania and Basilicata offshore (Southern Tyrrhenian sea, Italy). Seismo-stratigraphic techniques and methodologies are examined, referring, in particular, to the Naples, Agropoli and Maratea areas (Campania and Basilicata regions). In the Campania offshore the stratigraphic architecture of the volcaniclastic basins of the Volturno Basin, Ischia offshore and Naples Bay is shown in detail and interpreted through the concepts of seismic stratigraphy. Regional geological concepts have also been utilized for a better land-sea interpretation of the seismic units filling the observed sedimentary basins. A correlation with land geology of Southern Apennines has been attempted to obtain a better geological comprehension of the interpreted structures. In the Volturno Basin (northern Campania) the trending of the seismic units is controlled by the Massico structural high, bounding the basin towards the north-west and controlling depositional geometries typical of a NE-SW striking fan complex. Deep litho-stratigraphic well data tied to the seismic lines have highlighted the pyroclastic layers and the conglomeratic strata of the lagoon and delta environments, evolving upwards towards marine sediments. Complex strata patterns have been revealed by seismic data in the Quaternary basin filling, overlying the Meso-Cenozoic carbonatic basement and the related flysch deposits. Seismo-stratigraphic evidence on buried volcanic structures and overlying Quaternary marine deposits are here presented to reconstruct the stratigraphic setting of the south-eastern continental shelf of the Ischia island (Naples Bay) and to draw attention to new implications on the marine geophysics and volcanology of the volcanic complex. In the eastern Ischia offshore relic volcanic edifices, representing the remnants of hydro-magmatic volcanic vents, mostly formed by hialoclastites and indicating an emplacement in a subaqueous environment have been investigated through high resolution seismics. The stratigraphic architecture of the Capri Basin and the Salerno Valley, tectonically-controlled and located southwards of the Capri-Sorrento master fault, strongly down throwing the Meso-Cenozoic carbonates cropping out in the Sorrento Peninsula has been studied in detail. The Capri Basin is a deep basin located southwards of the Naples Bay, filled by Pleistocenic-Holocenic sediments overlying Meso-Cenozoic carbonates. The Salerno Valley is a half-graben filled by three seismic units corresponding to Quaternary marine deposits, overlying Miocene siliciclastic chaotic sequences. The stratigraphic setting of the Quaternary marine successions of the Agropoli continental shelf, located offshore the Punta Licosa morpho-structural high, characterized by wide outcrops of rocky acoustic substratum and resulting from the seaward prolongation of the structural-stratigraphic units cropping out onshore in the adjacent emerged sector of the Cilento Promontory has been studied. In conclusion, the example of the continental shelf and slope off the Maratea Valley has been investigated. The relationships between the geological and structural settings on land and the seismic stratigraphy in the surrounding offshore have been examined. The geological framework of the Maratea Valley is connected with the late Pleistocene and Holocene geologic evolution on the shelf and slope, mainly in terms of late Quaternary sea level glacio-eustatic fluctuations.
| Item Type: | Book Section |
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| Subjects: | 500 Scienze naturali e Matematica 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia 500 Scienze naturali e Matematica > 550 Scienze della Terra > 554 Scienze della terra – Europa (Classificare qui la Geologia, i rilevamenti geologici, la stratigrafia dell’Europa) |
| Depositing User: | Dr Gemma Aiello |
| Date Deposited: | 10 Dec 2012 08:48 |
| Last Modified: | 10 Dec 2012 08:48 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/4375 |
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