Tectonic controls on sedimentary system along the continental slope of the central and southeastern Tyrrhenian Sea

Gamberi, Fabiano; Valle, Giacomo Della; Marani, M.; Mercorella, Alessandra; Distefano, Salvatore; Stefano, Agata Di

doi:10.3301/ijg.2019.08

Cited by 15 publications

(14 citation statements)

References 47 publications

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“…The Hyblean Plateau is tectonically controlled by the convergence between the African and European plates, which affected both the on‐ and off‐shore setting of the southeastern coast of Sicily. In fact, the large‐scale ongoing geological processes control the morpho‐structural pattern of the Hyblean Plateau (Maniscalco et al, 2022) and also reflect the submerged areas (Carbone et al, 1987; Distefano et al, 2018, Distefano, Gamberi, Baldassini & Di Stefano, 2019; Distefano, Gamberi & Di Stefano, 2019; Distefano, Gamberi, Baldassini & Di Stefano, 2021; Distefano, Gamberi, Borzì & Di Stefano, 2021; Firetto et al, 2013; Gamberi et al, 2019; Maniscalco et al, 2022; Pirrotta et al, 2013).…”

Section: Study Area: the Augusta Bay (Southern Italy)mentioning

confidence: 99%

Shoreline change dynamics along the Augusta coast, eastern Sicily, South Italy

Laksono

Borzì

Distefano

et al. 2023

Earth Surf Processes Landf

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The coastal region of Augusta, eastern Sicily, Italy, is a densely populated zone, where human pressures profoundly shaped the coastal and land dynamics. So far, understanding the interaction between natural and human processes in modelling coastal geomorphology is still quite challenging. However, coastal and environmental monitoring poses the bases for managing coastal areas properly. Therefore, the aim of this research was first to understand the medium‐term shoreline changes along Augusta Bay between 1972 and 2021, and then assess the main local coastal modifications determined by the increasing coastal armouring. To do so, the shorelines dataset was extracted from Landsat and Sentinel‐2 satellite imageries using the NDWI and mNDWI methods and then statistical parameters were computed using Digital Shoreline Analysis System (DSAS). Results show that this coastal fringe experienced significant shoreline recession over the studied time interval. Negative shoreline shifts are higher in correspondence with torrent deltas, as a result of the increasing human and natural forces insisting on the land and coastal environments. Since 1970s, Augusta Bay registered a significant increase in artificial coastal length and a coastal armouring index of Maximal level was reached today.

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Section: Study Area: the Augusta Bay (Southern Italy)mentioning

confidence: 99%

Shoreline change dynamics along the Augusta coast, eastern Sicily, South Italy

Laksono

Borzì

Distefano

et al. 2023

Earth Surf Processes Landf

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“…The submarine expression of the high rates of uplift of the basin margin is particularly evident in the Sicilian sector, where seafloor instability resulted in an extensive mass-transport complex (Gamberi and Marani, 2006;Gamberi and Rovere, 2011;Rovere et al, 2014;Gamberi et al, 2019) (Figure 1A).…”

Section: Geological Settingmentioning

confidence: 99%

“…Evidence of the recent tectonic activity is given by the presence of fluid escape features (pockmarks) at the seafloor in connection with a transpressive fault (Rovere et al, 2014) (Figure 1A). An extensional fault crosses the base of the Acquarone high with a W-E direction in a sector highly affected by mass-wasting processes (Gamberi et al, 2019) (Figures 1A,B). The Acquarone fan develops southward from the Gioia-Mesima channel, a tributary to the Stromboli channel (Figure 1A).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Acquarone fan develops southward from the Gioia-Mesima channel, a tributary to the Stromboli channel (Figure 1A). The Gioia-Mesima channel has undergone a complex evolution a complex evolution shown by abandoned meanders incised by a straight course due to base level deepening associated with the erosion and deepening of the Stromboli valley (Gamberi and Marani, 2008;Gamberi et al, 2019). The Acquarone Fan develops in the ENE-dipping slope and reaches a water depth of 1,000 m. The fan is fed by two submarine canyons (Figure 1B).…”

Section: Geological Settingmentioning

confidence: 99%

“…Also the internally generated origin has been excluded since it have been recognized in a prevalently erosional channel where turbidity currents originate knick-point far higher (about 20 m) and steeper (10 °-30 °) than the knick-points in the Acquarone channel (Heijnen et al, 2020). Accordingly with the interpretation of Gamberi et al (2019), the origin of the knick-points in the Acquarone channel can most likely be ascribed to the tectonic framework. This thesis is supported by KP1 which represent the prosecution of an extensive fault that cross the base of the Acquarone High (Figure 4A).…”

Section: Channelmentioning

confidence: 99%

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The Influence of Channel Planform and Slope Topography on Turbidity Current Overbank Processes: The Example of the Acquarone Fan (Southeastern Tyrrhenian Sea)

2022

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Overbank deposits provide a potentially valuable record of flows that have passed through a submarine channel. The architecture of overbank deposits has generally assumed to relate to autogenic processes related to channel construction. In previous models, which are largely based on passive margins, the distribution and geometry of these deposits is relatively simple, and hence generally predictable. Here, we show how the interaction of different flow types with the complex morphology on a highly-tectonically modified margin can profoundly affect overbank depositional processes, and hence also the resultant deposit geometry and architecture. Our case study is the Acquarone Fan, located in the intraslope Gioia Basin in the south-eastern Tyrrhenian Sea, whose topography is mainly controlled by the presence of the Acquarone structural ridge, which results in the confinement of the left south-west side of the channel-levee system. The research is carried out through analysis of multibeam bathymetric and high-resolution Chirp sub-bottom profiler data. Seven depositional units (Units I-VII) record the recent depositional history of the fan; their thickness has been mapped and their parent flow-types have been interpreted through their seismic response. According to unit thickness maps, two main patterns of deposition are recognized in the overbank area. Their depocenters coincide with different extensive sediment wave fields developed in specific tracts of the right levee and in the frontal splay area. We show that the location of the depocenters varies in time according to the prevalent flow-type and by its interaction with the surrounding seafloor topography and channel planform. We interpret that the lateral confinement of the channel by the structural high generates episodic rebound of the overspilling flow and the inversion of the channel asymmetry. The vertical stratification of the flow strongly influences the overbank deposition where the channel planform has a non-linear shape such as bends and knick-points. In particular, the vertical stratification influences the hydraulic jump size that conditions the amount of overspill and thus the location of overbank depocenters. This study highlights that variations in the sediment distribution and composition on the overbank can be related to the way different flows interact with tectonic setting.

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