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  • 04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques  (1)
  • 04.04. Geology  (1)
  • 3D multi-channel seismic survey  (1)
  • 1
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    Very high resolution seismic surveys in the lagoon and gulf of Venice shallow waters (2015)
    Details
    Publication Date: 2017-04-04
    Description: Within the framework of the geological mapping of the Venice area (CARG Project: Map Sheet 128 “Venezia” and Map Sheet 148-149 “Chioggia-Malamocco”) a very high resolution seismic survey (VHRS) was carried out to correlate data from hundreds of cores with the main aim to map the depth of the Late Pleistocene and Holocene unconformity (Brancolini et al., 2005; Rizzetto et al., 2005; Tosi et al., 2006a,b). Due to logistic and technical limits, the acquisition of seismic survey in the Venice Lagoon was restricted to the channels with more of 5 m water depth, most of them artificial or dredged. A new survey, with the aim to extend the VHRS surveys to the shallow water, such as the tidal flats, is in progress within the Co.Ri.La. Project framework (3.16 Subproject). The Co.Ri.La 3.16 Subproject is based on an acquisition system installed on a boat with a very shallow draught. The new survey will allow the detection and mapping of many interesting geological-geomorphologic structures, i.e. paleoriver beds, ancient lagoon channels and shoreline ridges, that are like-outcropping, and that have been only partially recognized in the previous surveys.
    Description: Published
    Description: Barcelona (Spain)
    Description: 7A. Geofisica di esplorazione
    Description: open
    Keywords: Venice ; VHR ; Holocene ; Pleistocene. ; shallow water ; BOOMER ; 3D multi-channel seismic survey ; beach rocks ; Tegnue ; 04. Solid Earth::04.04. Geology::04.04.04. Marine geology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 2
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    Paleoseismological evidence for historical ruptures along the Meduno Thrust (eastern Southern Alps, NE Italy) (2022)
    Elsevier
    Details
    Publication Date: 2022-04-29
    Description: We carried out new geological, morphotectonic, geophysical and paleoseismological investigations on the Meduno Thrust that belongs to the Pliocene-Quaternary front of the eastern Southern Alps in Friuli (NE Italy). The study area is located in the Carnic Prealps, where a series of alluvial terraces, linked to both climatic and tectonic pulses characterises the lower reach of the Meduna Valley. In correspondence of the oblique ramp of the Meduno Thrust, the Late Pleistocene Rivalunga terrace shows a set of scarps perpendicular to the Meduno valley, often modified by human activity. In order to reconstruct the tectonic setting of the area and identify the location for digging paleoseismological trenches, integrated geophysical investigations including electrical resistivity tomography, seismic refraction and reflection, ground penetrating radar and surface wave analyses (HVSR, ReMi and MASW), were carried out across the scarps of the Rivalunga terrace. Geophysical surveys pinpointed that in correspondence of the oblique ramp, stress is accommodated by a transpressive thrust system involving all the seismo-stratigraphic horizons apart from the ploughed soil. Trenching illustrated the Meduno Thrust movements during Late Pleistocene-Holocene. Trenches exhibited both shear planes and extrados fracturing, showing deformed alluvial and colluvial units. 14C datings of the colluvial units show that the most recent fault movements occurred after 1360 CE and 1670 CE. The age of the deformed stratigraphic units compared with the earthquakes listed in current catalogues, suggests that the 1776 earthquake (Mw 5.8, Io = 8–9 MCS) could represent the last seismic event linked to the Meduno thrust activity. This study provided new quantitative constraints improving seismic hazard assessment for Carnic prealpine area.
    Description: The research developed in the framework of the agreement between the Regione Autonoma Friuli Venezia Giulia - Direzione Centrale Ambiente ed Energia - Servizio Geologico, the Istituto Superiore per la Protezione e la Ricerca Ambientale (I.S.P.R.A.) and the University of Udine. The project was funded by the Regione Autonoma Friuli Venezia Giulia, Direzione Centrale Ambiente ed Energia, Servizio Geologico (C.I. G.: Z0E0C5EF75, p.i. Maria Eliana Poli).
    Description: Published
    Description: 229071
    Description: 2T. Deformazione crostale attiva
    Description: JCR Journal
    Keywords: Active fault ; Paleoseismology ; Morphogenic earthquake ; Eastern Southern Alps ; Applied geophysics ; NE Italy ; 04.04. Geology ; 04.07. Tectonophysics
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
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    UNDERSTANDING THE RELATIONSHIP BETWEEN CONTINENTAL AND MARINE GROUNDWATER IN YANTAI (CHINA) AND VENICE (ITALY) AREAS: PRELIMINARY RESULTS (2014)
    Details
    Publication Date: 2017-04-04
    Description: The coastal areas are transition zones where land and ocean processes interact and play a critical role. Here, several factors may trigger environmental disasters or increases hydrogeological hazard. More than half of the global population lives in the 60 km wide coastal zone and the resources for populations, such as freshwater and food, depend on the critical relationships between land and sea and their variations due to both natural and anthropogenic causes. In particular, climate changes and stresses induced by human activities, e.g. pollution, engineering interventions for dams, flood control, canalization, deforestation, urbanization, agriculture and freshwater withdrawals, cause the degradation and the ravage of the habitat. In the new millennium the management of the use of coastal areas is focussed on the integration of the monitoring systems which have to provide data and information for decision support system-based actions. In 2008 the project “An integrated monitoring and management approach of hydrologic processes in coastal ecosystems for the understanding of the relationship between continental and marine waters in the Yantai (China) and in Venice (Italy) areas” started under the umbrella of the bilateral scientific and technological agreement between the National Research Council of Italy and the Chinese Academy of Sciences. The project is carried out by the Institute of Marine Sciences of Venice and the Institute of Coastal Zone Research for Sustainable Development of Yantai. This project aims at understanding the complex relationship between continental and marine groundwater, i.e. the salt water intrusion, in two coastal areas, the Laizhou Bay (Shandong Province) in the southern Bohai Sea (China) and the Venice Lagoon (Italy). In this work we report an overview of the salt water contamination process in the two study areas and some preliminary results on a survey carried out in the Venice Lagoon, which goal was to test seismic and geoelectrical surveys for the detection of buried morphological features, such as high-permeable sandy paleo-channels, that can enhance the flow of saline water from the lagoon-sea to the inland.
    Description: Published
    Description: Trieste, Italy
    Description: 6A. Monitoraggio ambientale, sicurezza e territorio
    Description: open
    Keywords: hydrogeological hazard ; Continuous Marine Electrical Resistivity Tomography ; coupled CERT-VHRS survey ; Very High Resolution Seismic survey ; very shallow water ; salt water contamination process ; buried morphological features ; Laizhou Bay ; Venice Lagoon ; 04. Solid Earth::04.05. Geomagnetism::04.05.08. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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