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D'Oriano, F.
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- PublicationOpen AccessMultidisciplinary Investigations at Panarea (Aeolian Islands) after the Exhalative Crisis of 2002(2011-11)
; ; ; ; ; ; ; ; ; ;Bortoluzzi, G.; CNR-ISMAR ;Aliani, S.; CNR-ISMAR ;Ligi, M.; CNR-ISMAR ;D'Oriano, F.; CNR-ISMAR ;Ferrante, V.; CNR-ISMAR ;Riminucci, F.; CNR-ISMAR ;Carmisciano, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Cocchi, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Muccini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; ; ; ; ; ; ; ; ; ;Enrico Brugnoli, Giuseppe Cavarretta, Salvatore Mazzola, Fabio Trincardi, Mariangela Ravaioli, Rosalia Santoleri; Marine Research at CNRPanarea and surrounding Islets form a volcanic edifice, that is part of the Eastern sector of the Aeolian Arc, Southern Tyrrhenian Sea. It is now considered inactive, since last documented activity is 20 Ka old. However, on 2002-11-03, gas started to flow violently from the seafloor in an area E of the Island, mainly along NE and NW structural lineaments, and lasting up to 2003-2004 with a consistent flux, orders of magnitude larger that ’steady-state’ fumarolic activity documented there in historical times. On the same period a strong effusive activity of Stromboli (10 NM to NNE) was present. Since then, several investigations have been conducted at sea and on land, with the aim of focusing on the problem of effusive activity at sea, mainly in the light of volcanic surveillance and risk. Among these investigations, some of which have been repeated over years, we present and discuss some data and results from: (a)visual inspection and sampling by divers and ROV, (b)GPS networks and mapping by multibeam and LIDAR, (c) oceanographical measurements by current meters and CTD, and water flux and dynamics measurements, (d)magnetic and gravimetric surveys, (e) multichannel reflection Seismic with OBS and land station networks. Data were used for compilation of high resolution bathymetric, magnetic and gravimetric maps, including the emerged and submerged portions of the edifice.260 216 - PublicationOpen AccessRAPPORTO SULLE INDAGINI DI SISMICA A RIFLESSIONE, GRAVIMETRICHE, MAGNETOMETRICHE, MORFOBATIMETRICHE E CAMPIONAMENTO FONDO MARE NELL’ ARCO CALABRO (MAR IONIO) CAMPAGNA CALAMARE08(2008-05-12)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Polonia, A.; CNR - ISMAR ;Bortoluzzi, G.; CNR - ISMAR ;Gasperini, L.; CNR - ISMAR ;Ligi, M.; CNR - ISMAR ;Carrara, G.; CNR - ISMAR ;Cuffaro, M.; CNR - ISMAR ;D'Oriano, F.; CNR - ISMAR ;Riminucci, F.; CNR - ISMAR ;Zittellini, N.; CNR - ISMAR ;Torelli, L.; Università di Parma ;Capozzi, R.; Università di Bologna ;Oppo, D.; Università di Bologna ;Viola, I.; Università di Bologna ;Minelli, L.; Università di Roma-3 ;Gallais, F.; Université di Brest ;Carmisciano, C.; INGV ;Gambetta, M.; INGV ;Locritani, M.; INGV ;Muccini, F.; INGV ;Carone, S.; Istituto Idrografico della Marina ;Laterra, A.; Istituto Idrografico della Marina; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The study of the Calabrian Arc in the Ionian Sea is key to understanding of the geological processes in the Mediterranean Sea. We present the technical details and results of cruise CALAMARE08 with N/O Urania during spring 2008. We acquired a large set of geological and geophysical data, among them Multichannels Seismic and SBP, magnetometry, gravimetry, swath bathymetry and coring of sea bottom.370 1590 - PublicationRestrictedMapping of seafloor hydrothermally altered rocks using geophysical methods: Marsili and Palinuro seamounts, Southern Tyrrhenian Sea(2014-12)
; ; ; ; ; ; ; ; ;Ligi, M.; CNR-ISMAR ;Cocchi, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Bortoluzzi, G.; CNR-ISMAR ;D'Oriano, F.; CNR-ISMAR ;Muccini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Caratori Tontini, F.; GNS Science ;de Ronde, C.; GNS Science ;Carmisciano, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; ; ; ; ; ;; Hydrothermal alteration processes involve mineralogical, chemical, and textural changes as a result of hot aqueous #uid-rock interaction under evolving boundary conditions. These changes affect the physico-chemical properties of the rocks, enabling high-resolution geophysical prospecting to be an important tool in the detection of sea#oor hydrothermal alteration. Here we present the results of recent geophysical investigations of the Marsili and Palinuro volcanic complexes, southern Tyrrhenian Sea, during the 2010 TIR10 and 2011 MAVA2011 cruises by the R/V Urania. The new dataset includes a dense grid of multibeam bathymetry; sea#oor re#ectivity, magnetic and gravity lines; and high-resolution single (CHIRP) and multichannel seismic proYles. The surveys were focused on areas known to host intense hydrothermal alteration in order to provide a more detailed description of the Marsili and Palinuro hydrothermal systems. Ground-truthing was based on earlier discoveries of hydrothermal vents and their associated deposits, and on direct observations made by ROV dives. High-resolution morpho-bathymetry, sonar re#ectivity, rock magnetization, and density distribution together enabled us to assess the extent of sea#oor hydrothermal alteration and its relationship to local volcanic and tectonic structures. Hydrothermal alteration associated with the Marsili seamount is largely distributed along primary volcano-tectonic structures at the ridge crest. By contrast, at Palinuro hydrothermal alteration is mostly associated with secondary volcanic structures such as collapsed calderas and volcanism reactivation along ring faults. In particular, evidence for intense hydrothermal activity occurs at Palinuro where volcanotectonic features interact with regional tectonic structures.413 36 - PublicationRestrictedInteractions between volcanism and tctonics in the western Aeolian sector, southern Tyrrhenian Sea(2010)
; ; ; ; ; ; ; ; ; ; ; ; ;Bortoluzzi, G.; CNR-ISMAR Bologna ;Ligi, M.; CNR-ISMAR Bologna ;Romagnoli, C.; Università di Bologna ;Cocchi, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Casalbore, D.; Università di Bologna ;Sgroi, T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Cuffaro, M.; Università La Sapienza Roma ;Caratori Tontini, F.; GNS Science, New Zealand ;D'Oriano, F.; CNR-ISMAR Bologna ;Ferrante, V.; CNR-ISMAR Bologna ;Remia, A.; CNR-ISMAR Bologna ;Riminucci, F.; CNR-ISMAR Bologna; ; ; ; ; ; ; ;; ; ; New high-resolution bathymetric and magnetic data from the western Aeolian sector, southern Tyrrhenian Sea, provide insights into structural and volcanic development of the area, suggesting a strong interaction between volcanism and tectonics. The analysis of these data combined with relocated earthquake distribution, focal plane solutions and strain rate evaluation indicates that the dextral strike-slip Sisifo-Alicudi shear zone is a complex and wide area of active deformation, representing the superficial expression of the deep seated lithospheric tear fault separating the subduction slab below Sicily and Calabria. Most of the observed volcanic features are aligned along a NW–SE trend, such as the Filicudi island-Alicudi North Seamount and Eolo-Enarete alignments, and are dissected by hundred-metre-high scarps along conjugate NNE–SSW trending fault systems. The magnetic field pattern matches the main trends of volcanic features. Spectral analysis and Euler deconvolution of magnetic anomalies show the existence of both deep and shallow sources. High-amplitude, high-frequency anomalies due to shallow sources are dominant close to the volcanic edifices of Alicudi and Filicudi, while the main contribution on the surrounding Eolo, Enarete, Alicudi North and Filicudi North seamounts is given by low-amplitude anomalies and/or deeper magnetic sources. This is probably related to different ages of the volcanic rocks, although hydrothermal processes may have played an important role in blanketing magnetic anomalies, in particular at Enarete and Eolo seamounts. Relative chronology of the eruptive centres and the inferred deformation pattern outline the Quaternary evolution of the western Aeolian Arc: Sisifo, Alicudi North and Filicudi North seamounts might have developed in an early stage, following the Late Pliocene–Early Pleistocene SE-ward migration of arc-related volcanism due to the Ionian subduction hinge retreat; Eolo, Enarete and Filicudi represent later manifestations that led volcanoes to develop duringMid-Late Pleistocene, when the stress regime in the area changed, due to the SSE-ward propagation of the subduction slab tear fault and the consequent reorientation and decrease of trench migration velocity. Finally, volcanic activity occurred in a very short time span at Alicudi, where an almost conical volcanic edifice emerged, suggesting negligible interactions with regional fault systems.608 46 - PublicationOpen AccessStyles and rates of deformation in the frontal accretionary wedge of the Calabrian Arc (Ionian Sea): controls exerted by the structure of the lower African plate(2017)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Bortoluzzi, G.; Institute of Marine Science CNR ISMAR-BO ;Polonia, A.; Institute of Marine Science CNR ISMAR-BO ;Torelli, L.; Department of Physics and Earth Sciences, University of Parma ;Artoni, A.; Department of Physics and Earth Sciences, University of Parma ;Carlini, M.; Department of Physics and Earth Sciences, University of Parma ;Carone, S.; Istituto Idrografico della Marina ;Carrara, G.; Institute of Marine Science CNR ISMAR-BO ;Cuffaro, M.; Istituto di Geologia Ambientale e Geoingegneria, CNR ;Del Bianco, F.; Institute of Marine Science CNR ISMAR-BO ;D'Oriano, F.; Institute of Marine Science CNR ISMAR-BO ;Ferrante, V.; Istituto Idrografico della Marina ;Gasperini, L.; Istituto Idrografico della Marina ;Ivaldi, R.; Istituto Idrografico della Marina ;La Terra, A.; Istituto Idrografico della Marina ;Ligi, M.; Institute of Marine Science CNR ISMAR-BO ;Locritani, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Muccini, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Mussoni, P.; Department of Physics and Earth Sciences, University of Parma ;Priore, F.; Institute of Marine Science CNR ISMAR-BO ;Riminucci, F.; Institute of Marine Science CNR ISMAR-BO ;Romano, S.; Institute of Marine Science CNR ISMAR-BO ;Stanghellini, G.; Institute of Marine Science CNR ISMAR-BO; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The Calabrian Arc is a narrow subduction-rollback system resulting from Africa/Eurasia plate convergence. We analysed the structural style of the frontal accretionary wedge through a multiscale geophysical approach. Pre-stack depth-migrated crustal-scale seismic profiles unravelled the overall geometry of the subduction complex; high-resolution multi-channel seismic and sub-bottom CHIRP profiles, together with morpho-structural maps, integrated deep data and constrained the fine structure of the frontal accretionary wedge, as well as deformation processes along the outer deformation front. We identified four main morpho-structural domains in the western lobe of the frontal wedge: the proto-deformation area at the transition with the abyssal plain; two regions of gentle and tight folding; a hummocky morphology domain with deep depressions and intervening structural highs; a highstanding plateau at the landward limit of the salt-bearing accretionary wedge, where the detachment cuts through deeper levels down to the basement. Variation of structural style and seafloor morphology in these domains are related to a progressively more intense deformation towards the inner wedge, while abrupt changes are linked to inherited structures in the lower African plate. Our data suggest focusing of intense shallow deformation in correspondence of deeply rooted faults and basement highs of the incoming plate. Back-arc extension in the Southern Tyrrhenian Sea has recently ceased, producing a slowdown of slab rollback and plate-boundary re-organization along trans-tensional lithospheric faults segmenting the continental margin. In this complex setting, it is not clear if the accretionary wedge is still growing through frontal accretion. Our data suggest that shortening is still active at the toe of the wedge, and uplift rates along single folds are in the range of 0.25-1.5 mm/yr. An unconformity within the Plio-Quaternary sediments suggests a discontinuity in sedimentation and tectonic processes, i.e. a slowdown of shortening rate or an increase in sedimentation rate, but not a real inactivation of frontal accretion, which still contributes to the migration of the outer deformation front towards the foreland.505 579