Factors controlling margin instability during the Plio-Quaternary in the Gela Basin (Strait of Sicily, Mediterranean Sea)

Gauchery, Tugdual; Rovere, Marzia; Pellegrini, Claudio; Cattaneo, Antonio; Campiani, Elisabetta; Trincardi, Fabio

doi:10.1016/j.marpetgeo.2020.104767

Cited by 21 publications

(7 citation statements)

References 70 publications

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“…The Pliocene and Quaternary are ideal time intervals to study sedimentary deposits when high amplitude fluctuations caused variations in sediment supply and played a crucial role in continental margin outbuilding. These fluctuations forced systematic shifts in the position of the shoreline across the continental shelves [44]. Consequently, it is absolutely possible that the 1790 Oran destructive earthquake triggered a tsunami with an epicenter located offshore so here, we have an argument that reinforces the assumption from [11] for the shifting of the shoreline in Oran.…”

Section: B Geohazards and Coastal Environmental Impactsupporting

confidence: 60%

Coastal Environmental Impact of Geohazards in the Area of the Habibas Islands (Western Algeria, Alboran): Insights from GIS-Analysis and Remote Sensing

Amir

Theilen‐Willige

2022

EJGEO

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Algerian coastal areas in the southern part of the western Mediterranean Sea are prone to geohazards such as tsunami waves, storm surges, earthquakes, submarine mass movements, and volcanism. Located in the Gulf of Oran, the Habibas Archipelago is a well-preserved bio-environment where fauna and flora are unique. This region is nevertheless a zone where marine traffic (oil) and oil ports pose a threat to environmental offshore pollution. This study is focused on submarine mass movements and their potential to cause local tsunami waves. Digital Elevation Model (DEM) data and the DEM-derived morphometric maps support these investigations being integrated into a GeoInformation System (GIS). Bathymetric data of the western Mediterranean Sea are used to derive causal factors that influence the susceptibility to submarine mass movements. Sentinel 2, Landsat 8, and Sentinel 1 radar images help to identify coastal areas prone to landslides and the coast-near structural pattern. By integrating data collected from the literature and maps (geology, tectonics, earthquakes, mass movements) into a GeoInformationSystem (GIS) and by using remote sensing analysis, it might be possible to derive more precisely in the case of submarine landslides and turbidity currents in the which direction potential tsunami waves caused by these mass movements might be focused and directed.

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Section: B Geohazards and Coastal Environmental Impactsupporting

confidence: 60%

Coastal Environmental Impact of Geohazards in the Area of the Habibas Islands (Western Algeria, Alboran): Insights from GIS-Analysis and Remote Sensing

Amir

Theilen‐Willige

2022

EJGEO

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“…It represents the foreland basin of the Maghrebian thrust belt of Sicily (Argnani et al, 1987;Lickorish et al, 1999), and is filled by up to 2000 m of turbidites and pelagic sediments of Pliocene-Quaternary age. The sedimentation rate from Pliocene to Middle Pleistocene (800 ka) was 150 m/Myr and reached 900 m/Myr in the last 800 kyr (Gauchery et al, 2021). The upper part of the sedimentary fill is characterized by abundant mass transport deposits.…”

Section: The Gela Basin Eastern Slope Geological Settingmentioning

confidence: 99%

“…Another submarine slide is placed southward, about 40 km north of the Malta archipelago (Figure 1C). In this work, it is named South Gela Basin Slide (SGBS) according to Gauchery et al (2021). Pieces of evidence of collapse are very clear: a large scar at the shelf-edge, more than 5 km long (blue line in Figure 1C), with a 5°average slope from 200 to 500 m water depth; a large deposit, easily recognizable at the toe of the slope (350-550 m water depth), covering an area of more than 50 km 2 (delimited by the dashed-blue contour in Figure 1C).…”

Section: Mass Failures Along the Gbesmentioning

confidence: 99%

“…Grid G2, marked in blue in Figure 4, accounts for the SGBS scenario and includes the Malta archipelago as well; grid G3 (in red) covers the NTS case and the coast of the Gulf of Gela. Both computational grids have been built with a 50 m spatial step by combining a swath bathymetry dataset acquired with 30-100 kHz multibeam systems and an overall 50 m resolution along the slope (Gauchery et al, 2021), with the already cited EMODnet bathymetry used to fill the data gaps.…”

Section: Tsunami Computational Gridsmentioning

confidence: 99%

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Tsunamis From Submarine Collapses Along the Eastern Slope of the Gela Basin (Strait of Sicily)

et al. 2021

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Geophysical surveys in the eastern slope of the Gela Basin (Strait of Sicily, central Mediterranean) contributed to the identification of several episodes of sediment mass transport, recorded by scars and deposits of various dimensions within the Pleistocene succession. In addition to a huge failure called Gela Slide with volume exceeding 600 km3, the most studied events show volumes estimated between 0.5 and 1.5 km3, which is common to many other submarine landslide deposits in this region and that can therefore be considered as a characteristic value. In this work, the tsunamigenic potential of two of such landslides, the so-called Northern Twin Slide and South Gela Basin Slide located about 50 km apart along the eastern slope of the Gela Basin, are investigated using numerical codes that describe the onset and motion of the slide, as well as the ensuing tsunami generation and propagation. The results provide the wave height of these tsunami events on the coast of southern Sicily and Malta and can be taken as representative of the tsunamigenic potential of typical landslides occurring along the slope of the Gela Basin.

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“…Their study facilitates better understanding of palaeoenvironmental analyses because clinothems are sensitive to the rate of sediment supply versus the accommodation space (Helland-Hansen & Hampson, 2009;Pellegrini et al, 2017bPellegrini et al, , 2020. Many clinothem studies focus on the internal characteristics and geometric parameters (O'Grady et al, 2000;Anell et al, 2014;Anell & Midtkandal, 2017;Beelen et al, 2019), on palaeogeographical or morphological aspects of the slope and the relationship with sequence stratigraphy (Helland-Hansen & Hampson, 2009;Olariu & Steel, 2009;Magyar et al, 2019;Zhuo et al, 2019), on the response of clinothems to sea-level fluctuations and sediment supply (Helland-Hansen & Hampson, 2009;Lin et al, 2018;Jia et al, 2020;Trincardi et al, 2020;Pellegrini et al, 2021), and on the mechanism that drives the transport of sediment to the basin floor (Plink-Bj örklund & Steel & Olsen, 2002;Gong et al, 2016Gong et al, , 2017Gamberi et al, 2020;Patruno et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the geometric characteristics of clinothems and the relationship with shelf‐edge trajectories of the Plio‐Pleistocene continental slope in the Qiongdongnan Basin, South China Sea

Liu

Loon

et al. 2022

Sedimentology

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Based on high-quality two-dimensional seismic profiles and well data, the seismic reflection characteristics from the late Pliocene and Pleistocene succession of the Qiongdongnan Basin in the South China Sea have been analysed. The result will help in understanding the sedimentological development of slope areas. Twenty coeval clinothems are recognized and four major clinothem types are distinguished. In addition, three types of shelf-edge trajectories are recognized. The various parameters of the clinothems are analysed quantitatively and the relationships between the various clinothem types are studied in combination with the controlling roles. It is concluded that: (i) the shelf-edge trajectories are related to the type of clinothem; (ii) fluctuations in the relative sea level, in combination with variations in sediment supply, result in different clinothem types and geometric parameters; these parameters show interdependencies; (iii) the alternations of progradation and aggradation of clinothems may provide information of the relative sea level and changes in sediment supply; (iv) some lowstand fans could develop at the foot of the slope in the central-eastern part of the basin when the relative sea level started to fall or began to rise. The results of the present study are consequently significant for further quantitative analyses of the characteristics and development of the continental slope, not only in the Qiongdongnan Basin, but also in other basins.

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Factors controlling margin instability during the Plio-Quaternary in the Gela Basin (Strait of Sicily, Mediterranean Sea)

Cited by 21 publications

References 70 publications

Coastal Environmental Impact of Geohazards in the Area of the Habibas Islands (Western Algeria, Alboran): Insights from GIS-Analysis and Remote Sensing

Coastal Environmental Impact of Geohazards in the Area of the Habibas Islands (Western Algeria, Alboran): Insights from GIS-Analysis and Remote Sensing

Tsunamis From Submarine Collapses Along the Eastern Slope of the Gela Basin (Strait of Sicily)

Analysis of the geometric characteristics of clinothems and the relationship with shelf‐edge trajectories of the Plio‐Pleistocene continental slope in the Qiongdongnan Basin, South China Sea

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