The sedimentary basins of the Campania-Latium Tyrrhenian margin have been investigated in detail aimed at studying and reconstructing their Quaternary geologic evolution through seismo-stratigraphic data calibrated with deep lithostratigraphic wells. The Terracina and Gaeta basins are located on the Latium Tyrrhenian margin, where a thick Quaternary deposition has been detected. The tectonic setting of these basins is characterized by counter-Apenninic (NE-SW) trending normal faults and by E-W trending normal faults. Based on multichannel seismic data collected by the Italian Ministry of Industry (Videpi Project) these faults appear to downthrow both the acoustic basement, composed of Meso-Cenozoic tectonic units ("Latium-Abruzzi carbonate platform deposits", Mesozoic in age and "Flysch di Frosinone" Auct., Miocene in age) and the Quaternary deposits, which are organized in different seismo-stratigraphic units. One of the most important faults is represented by the Massico fault, NW-SE trending, whose offshore prolongation bounds southwards the Gaeta basin towards the Campania continental margin. The stratigraphic and tectonic setting of the Napoli basin has been deeply studied based on both single-channel and multichannel seismic profiles. It is a Pleistocene half-graben which can be compared, from a geodynamic point of view, to the other peri-tyrrhenian basins of the Campania-Latium Tyrrhenian margin. The Napoli Bay, including the Napoli basin, is a significant part of a belt of coastal tectono-stratigraphic depressions, including the Campania Plain, the Volturno Plain and the Sele Plain. The Campania Plain is bounded by important normal faults, whose tectonic activity is concentrated at the margins of the coastal plain. The onshore basin is filled by several thousand of meters of Quaternary sediments and volcanic rocks, emplaced during the eruptive activity of the Vesuvius, Phlegrean Fields and Ischia and Procida volcanic complexes. Different seismo-stratigraphic units have been distinguished, representing the Naples basin filling. The first unit is distinguished by progradational to parallel reflectors, overlying the Meso-Cenozoic carbonates and downthrown by normal faults, probably Early Pleistocene in age. The second unit is represented by a syntectonic wedge, deposited during the tectonic tilting of the carbonate strata pertaining to the acoustic basement and is probably Middle Pleistocene in age.. The third unit is distinguished from progradational to parallel seismic reflectors and is probably Late Pleistocene in age. The NE-SW trending horst of the Sorrento Peninsula, which separates the Naples and the Salerno Bays is long about 20 kilometers and is characterized by the occurrence of listric faults, which downthrow towards north some main blocks composed of Meso-Cenozoic units of carbonate platform pertaining to the Southern Apennines. The Naples Bay, including the Napoli basin, is crossed by two main systems of normal faults, both NE-SW and NW-SE trending, along which the Nisida and Pentapalummo volcanic banks are located. A complex fault system with a NNE-SSW trend offshore the Vesuvius has been individuated in correspondence with the Torre del Greco volcanic structure, representing the offshore prolongation of the volcanic complex.
The Sedimentary Basins of the Northern Campania Tyrrhenian margin (Southern Italy): Geologic Evolution and Advances in Seismic Stratigraphy
Gemma Aiello
2018
Abstract
The sedimentary basins of the Campania-Latium Tyrrhenian margin have been investigated in detail aimed at studying and reconstructing their Quaternary geologic evolution through seismo-stratigraphic data calibrated with deep lithostratigraphic wells. The Terracina and Gaeta basins are located on the Latium Tyrrhenian margin, where a thick Quaternary deposition has been detected. The tectonic setting of these basins is characterized by counter-Apenninic (NE-SW) trending normal faults and by E-W trending normal faults. Based on multichannel seismic data collected by the Italian Ministry of Industry (Videpi Project) these faults appear to downthrow both the acoustic basement, composed of Meso-Cenozoic tectonic units ("Latium-Abruzzi carbonate platform deposits", Mesozoic in age and "Flysch di Frosinone" Auct., Miocene in age) and the Quaternary deposits, which are organized in different seismo-stratigraphic units. One of the most important faults is represented by the Massico fault, NW-SE trending, whose offshore prolongation bounds southwards the Gaeta basin towards the Campania continental margin. The stratigraphic and tectonic setting of the Napoli basin has been deeply studied based on both single-channel and multichannel seismic profiles. It is a Pleistocene half-graben which can be compared, from a geodynamic point of view, to the other peri-tyrrhenian basins of the Campania-Latium Tyrrhenian margin. The Napoli Bay, including the Napoli basin, is a significant part of a belt of coastal tectono-stratigraphic depressions, including the Campania Plain, the Volturno Plain and the Sele Plain. The Campania Plain is bounded by important normal faults, whose tectonic activity is concentrated at the margins of the coastal plain. The onshore basin is filled by several thousand of meters of Quaternary sediments and volcanic rocks, emplaced during the eruptive activity of the Vesuvius, Phlegrean Fields and Ischia and Procida volcanic complexes. Different seismo-stratigraphic units have been distinguished, representing the Naples basin filling. The first unit is distinguished by progradational to parallel reflectors, overlying the Meso-Cenozoic carbonates and downthrown by normal faults, probably Early Pleistocene in age. The second unit is represented by a syntectonic wedge, deposited during the tectonic tilting of the carbonate strata pertaining to the acoustic basement and is probably Middle Pleistocene in age.. The third unit is distinguished from progradational to parallel seismic reflectors and is probably Late Pleistocene in age. The NE-SW trending horst of the Sorrento Peninsula, which separates the Naples and the Salerno Bays is long about 20 kilometers and is characterized by the occurrence of listric faults, which downthrow towards north some main blocks composed of Meso-Cenozoic units of carbonate platform pertaining to the Southern Apennines. The Naples Bay, including the Napoli basin, is crossed by two main systems of normal faults, both NE-SW and NW-SE trending, along which the Nisida and Pentapalummo volcanic banks are located. A complex fault system with a NNE-SSW trend offshore the Vesuvius has been individuated in correspondence with the Torre del Greco volcanic structure, representing the offshore prolongation of the volcanic complex.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
