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Papers by luca baradello

Quaternary

The ancient Greek colony of Selinunte, with its acropolis on a promontory on the south-western co... more The ancient Greek colony of Selinunte, with its acropolis on a promontory on the south-western coast of Sicily, is flanked by two valleys where two modest rivers flow today: the Modione to the west and the Cottone to the east. Archaeological reconstructions, historical documents from various sources, and recent remote sensing surveys indicate two important bays corresponding to the ancient mouths of these two rivers, now completely covered by a thick layer of sediments. It is believed that the ports of the colony were located in these bays, although the remains of these ports are still sparse and contradictory. Here we present a multibeam bathymetric map of part of the marine area immediately off Selinunte and a series of high-resolution seismic profiles acquired parallel to the coastline. They show the geometries and stratigraphic context of the two buried river valleys offshore, from which information about the palaeoenvironmental setting and evolution of the landscape can be deri...

GPR and ERT – Integrated Geophysical Methods in Archaeology

Sequence stratigraphic significance of tidal channel systems in a shallow lagoon (Venice, Italy)

The Holocene, Mar 24, 2014

The Holocene succession located in the central part of the Venice Lagoon has been investigated by... more The Holocene succession located in the central part of the Venice Lagoon has been investigated by means of high-resolution seismic and core data, which document a full back-barrier depositional environment developed during the last 6 kyr. The studied succession, 4.5–23 m thick, consists of three seismic units bounded at the base by stratal surfaces marked by deep tidal channel incisions, recording main changes in the lagoon hydrodynamics as well as reorganizations of the tidal channel network. The recognized depositional and erosional phases in the lagoon deposits can be linked to both large-scale factors related to the Holocene sea-level rise and local factors in part due to the human impact. In particular, the lower unit is interpreted as the transgressive systems tracts of the Holocene sequence, initially characterized by the accumulation within small estuarine channels incised during the previous phase of subaerial exposure, whereas the upper units are interpreted as the highstand systems tracts, typified by the persistence of the lagoonal environment. The higher stratal surface records a hydrodynamic change related to a local transgression affecting a deltaic area placed just to the south, probably at least in part aided by human interventions. The Holocene succession accumulated in the central part of the Venice Lagoon testifies that the development of stratal surfaces in back-barrier settings, persisting during both transgressive and highstand conditions, may exhibit differences with respect to that predicted by current sequence stratigraphic models, and therefore, it is useful to improve the knowledge of these systems.

Active faulting in the Beagle Channel (Tierra del Fuego)

Terra Nova, May 2, 2023

In Tierra del Fuego, the Magallanes‐Fagnano Fault System (MFFS) accommodates a significant portio... more In Tierra del Fuego, the Magallanes‐Fagnano Fault System (MFFS) accommodates a significant portion of the relative motion between the South America and Scotia plates. However, it remains unclear whether some of the deformation is partitioned southwards, along the Beagle Channel Fault System (BCFS). In this paper, high‐resolution seismic reflection profiles were used to identify fault‐related ruptures in the submerged Quaternary sediments of the Beagle Channel. Some faults reach the seafloor, affecting marine sediments, indicating they are Holocene in age. The correlation with outcrop data and lineaments mapped onshore suggests the post‐glacial reactivation of two structures: the E‐W striking BCFS and the NW‐SE‐trending Lapataia Fault Zone (LFZ). Whereas the BCFS displays along‐strike variation in throw, the LFZ shows significant normal displacements. These results imply that deformation occurs in a wider and more complex manner than previously thought and highlight the need for a thorough hazard assessment of the area.

An Interdisciplinary Geophysical Approach To Detect Cavities In A Karst Region

Journal of Marine Science and Engineering

The lithological characterization of the seafloor is key information for offshore engineering, es... more The lithological characterization of the seafloor is key information for offshore engineering, especially when it comes to pier and platform design. Undetected shallow gas pockets may cause the collapse of heavy platforms for hydrocarbon production. Unconsolidated sediments are not ideal for the basement of wind farms for electric power production. Drilling and coring can be used for local sampling, but continuous profiles or even areal coverage are far more preferable. High-resolution seismic profiles are successfully used when ports are not too busy, but otherwise, single-channel systems must be used. We show in this paper that even these simpler systems can be used to estimate parameters such as the acoustic impedance of shallow sediments directly beneath the seafloor. We exploit the amplitude decay of the multiple reflections between the seafloor and the surface, which does not depend on the source energy. If the offset between source and receiver is not too small, we can estima...

Geosciences

The Sciacca basin extends in the southwestern part of Sicily and hosts an important geothermal fi... more The Sciacca basin extends in the southwestern part of Sicily and hosts an important geothermal field (the Sciacca Geothermal Field) characterized by hot springs containing mantle gasses. Newly acquired high-resolution seismic profiles (Boomer data) integrated with a multichannel seismic reflection profile in close proximity to the Sciacca Geothermal Field have documented the presence of numerous active and shallow fluid-related features (pipes, bright spots, buried and outcropping mud volcanoes, zones of acoustic blanking, and seafloor fluid seeps) in the nearshore sector between Capo San Marco and Sciacca (NW Sicilian Channel) and revealed its deep tectonic structure. The Sciacca Geothermal Field and the diffuse submarine fluid-related features probably form a single onshore–offshore field covering an area of at least 70 km2. This field has developed in a tectonically active zone dominated by a left-lateral transpressive regime associated with the lithospheric, NNE-striking Sciacca...

A workflow for processing mono‐channel Chirp and Boomer surveys

Geophysical Prospecting

High-resolution seismic characterization of post-glacial subaqueous mass movements in the Beagle Channel (Tierra del Fuego, Argentina): dynamics and tsunami hazard implications

Natural Hazards

Two enigmatic ridges in the Pantelleria Vecchia Bank (NW Sicilian Channel)

Heliyon

Potential Water Resources in the North-Eastern Adriatic Sea

Increasing demand for freshwater requires the identification of additional and less-conventional ... more Increasing demand for freshwater requires the identification of additional and less-conventional water resources. Amongst these, offshore freshened groundwater is considered a new opportunity to face increasing water demand and has been studied in different parts of the world. Here we focus on the north-eastern Adriatic Sea, where offshore aquifers could be present as a continuation of onshore aquifers. Geophysical data, especially offshore seismic data, as well as onshore and offshore well data were integrated and interpreted to characterize the hydrogeological setting via the interpretation of seismo-stratigraphic sequences. Two areas located in the proximity of the Tagliamento and Isonzo deltas were studied. Well and seismic data suggest that Quaternary sediments, extending from onshore to offshore areas, represent the most promising from an offshore freshwater resources point of view. Firstly, onshore well data confirm the presence of freshwater aquifer systems in proximity to t...

Combining SH- and P-wave seismic reflection survey to support seismic response analysis. A case study from Cavezzo (Italy) after the 2012 Emilia earthquake

Engineering Geology

Shallow Velocities Estimation by Multiples in Boomer Surveys

83rd EAGE Annual Conference & Exhibition

3-D Processing and interpretation of multi-fold Ground Penetrating Radar data: a case history from an archaeological site

1st International Workshop Electric, Magnetic and Electromagnetic methods applied to cultural herita, 1997

Digging navigable waterways through lagoon tidal flats: which short and long-term impacts on groundwater dynamics and quality?

EGUGA, Apr 1, 2017

Metodi Ground Penetrating Radar (GPR) a copertura multipla lineare e azimutale per indagini ambientali

The Gulf of Trieste is located in the northeastern part of the Adriatic Sea. After the Holocene t... more The Gulf of Trieste is located in the northeastern part of the Adriatic Sea. After the Holocene trangression marine sediment started depositing on top of Late Pleistocene continental deposits approximately 10,000 years ago in this area. We present the first model of the thickness of Holocene marine sediment in both the Italian and Slovenian parts of the Gulf of Trieste based on geomodeling from extensive high-resolution geophysical datasets along with published sedimentological data and nautical chart data.

Using 1C nodes in a 3C combination - benefits, and inconveniences

NSG2021 27th European Meeting of Environmental and Engineering Geophysics, 2021

The Maltese Islands (central Mediterranean Sea) are intersected by two normal fault systems assoc... more The Maltese Islands (central Mediterranean Sea) are intersected by two normal fault systems associated with continental rifting to the south. Because of a lack of evidence for offshore displacement and insignificant historical seismicity, the systems have been considered to be inactive. Here we integrate aerial and marine geological, geophysical and geochemical data to demonstrate that: (i) the majority of faults offshore the Maltese Islands underwent extensional to transtensional deformation during the last 20 ka, (ii) active degassing of CH 4 and CO 2 occurs via these faults. The gases migrate through Miocene carbonate bedrock and the overlying PlioPleistocene sedimentary layers to generate pockmarks at the muddy seafloor and rise through the water column into the atmosphere. We infer that the offshore faults systems are permeable and that they were active recently and simultaneously. The latter can be explained by a transtensional system involving two right-stepping, right-latera...