Salt morphologies and crustal segmentation relationship: New insights from the Western Mediterranean Sea

Bellucci, Massimo; Aslanian, Daniel; Moulin, Maryline; Rabineau, Marina; Leroux, Estelle; Pellen, Romain; Poort, Jeffrey; Ben, Anna Del; Gorini, Christian; Camerlenghi, Angelo

doi:10.1016/j.earscirev.2021.103818

Cited by 8 publications

(8 citation statements)

References 199 publications

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“…Offshore heat flow measurements showed a westwards increasing trend, from ~60 to > 150 mW m -2 (Jiménez- Munt et al, 2003;Poort et al, 2020). This could also have an influence on salt deformation through differential thermal loading, as recently argued by Bellucci et al (2021b). However, the higher heat flow to the west should induce a higher buoyancy and greater mobility of the salt (Jackson and Hudec, 2017).…”

Section: Lateral Variability In the Complexity Of Salt Structures And...mentioning

confidence: 85%

“…It is not clear whether this contraction was driven by thick‐skinned, tectonic shortening or local thin‐skinned, gravitational instability. Early thin‐skinned, gravitational salt deformation during deposition of the UU is observed on other Western Mediterranean margins, such as in the Gulf of Lion (Bellucci, Aslanian, et al, 2021; Mianaekere & Adam, 2020), the Western Sardinian (Del Ben et al, 2018), but also along the Levant margin in the eastern Mediterranean (Gvirtzman et al, 2013). The small magnitude of the folds and the analogy with other Mediterranean passive margins lead us to favour the gravity‐driven interpretation, with salt spreading and gliding on a tilted margin.…”

Section: Discussionmentioning

confidence: 99%

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Contractional salt deformation in a recently inverted basin: Miocene to current salt deformation within the central Algerian basin

et al. 2022

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Field analogues illustrating the early stage of deformation of shortening structures in salt-bearing orogenic fold-and-thrust belts are not yet well illustrated in literature. The relatively young Messinian salt of the Algerian basin could represent a good case example of such systems. The Algerian Basin is a deep-water Miocene back-arc basin including a layer of mobile Messinian evaporites up to 2 km thick. The Messinian salt was deposited in an already inverted basin, after its extensive stage. Its inversion initiated in the Tortonian, with a N-NW shortening induced by the north-westward motion of the African plate. In this study, we use new 2D multichannel seismic data to identify, classify and map salt structures throughout the central Algerian Basin and re-assess its structural style. We interpret contractional salt tectonic structures, such as buckle folds, squeezed diapirs and related salt sheets as evidence of regional thickskinned shortening episodes. We conclude that horizontal displacement loading has driven salt deformation within the basin since its deposition. We also show spatial variations in the structural style of the central Algerian Basin, both along-and down-dip. We demonstrate that the initial shortening-related salt deformation in the late Messinian was focussed along the Algerian margin and later shifted outward toward the Balearic margin in the Plio-Quaternary. The shifting of the deformation front is interpreted to be a result of the thickening and strengthening of the overburden. The second peak of deformation may have reactivated faults along the Emile-Baudot escarpment with thick-skinned deformation. We also observe a variation in the intensity of the salt deformation along the margin from SW to NE, which may be due to variable tectonic loading applied along the Algerian margin or the pre-shortening distribution of salt.

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Section: Lateral Variability In the Complexity Of Salt Structures And...mentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Contractional salt deformation in a recently inverted basin: Miocene to current salt deformation within the central Algerian basin

et al. 2022

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“…North of the Kabylides and tectonic suture, the hinterland was impacted by the opening of the Algerian back arc basin (Fig. 1) during the Upper Oligocene-Miocene until now, recording more than 2000 m of sediments over the extended continental to oceanic substratum of the Algerian Basin (Roure et al, 2012): a recent compilation is recently presented in Bellucci et al (2021). After the pioneer works and monographies (Vila;1980;Rouvier, 1985;Raoult, 1974;Raoult et al, 1982), numerous papers published during the last two decades provide a better overview and constraints on the tectonic pulses versus structural styles (Figs.…”

Section: Northern Africa Tell and Atlas Fold And Thrust Belts In Thei...mentioning

confidence: 99%

Hinterland and foreland structures of the eastern Maghreb Tell and Atlas thrust belts: tectonic controlling factors, pending questions, and oil/gas exploration potential of the Pre-Triassic traps

Khomsi

Roure

Vergés³

2022

Arab J Geosci

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This special issue of the AJGS entitled Geology of North Africa and Mediterranean regions is a follow-up of the AGIC (Atlas Georesources International conferences) organized in 2017 by the Georesources Laboratory and CERTE, Tunis, University of Carthage. This event was a major occasion for geoscientists from Arabian, Maghrebian, and European countries to present their recent findings and research results in the characterization of different georesources in North Africa, the Mediterranean, and surrounding areas, thus also including the Arabian plate.This thematic issue is composed of 33 papers covering a wide spectrum of topics and fields, from architecture and thermicity of sedimentary basins to structural evolution, oil/ gas exploration, fractured reservoirs, water resources, aquifer characterization, and applied geophysics.

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“…Our tectonic analysis of the crustal configuration and structure of the western Algerian Basin and its margins also studies how the Messinian evaporites are deformed in the region, a topic that has received little attention to date (e.g., Bellucci et al, 2021). The seismic data we use vary in quality, because we have used vintage commercial seismic reflection profiles on the Iberian margin, a single section on the Alboran margin, and a complete set of commercial and scientific lines on the Algerian margin.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

“…2. The sedimentary cover of this margin, particularly in the domain of the abyssal plain, contains diapirs involving the Messinian salt, although their three-dimensional geometry and the tectonic processes shaping these structures is still poorly understood (e.g., Bellucci et al, 2021).…”

Section: Algerian Marginmentioning

confidence: 99%

Crustal structures and salt tectonics on the margins of the western Algerian Basin (Mediterranean Region)

Soto

Déverchère

Hudec

et al. 2022

Marine and Petroleum Geology

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Salt morphologies and crustal segmentation relationship: New insights from the Western Mediterranean Sea

Cited by 8 publications

References 199 publications

Contractional salt deformation in a recently inverted basin: Miocene to current salt deformation within the central Algerian basin

Contractional salt deformation in a recently inverted basin: Miocene to current salt deformation within the central Algerian basin

Hinterland and foreland structures of the eastern Maghreb Tell and Atlas thrust belts: tectonic controlling factors, pending questions, and oil/gas exploration potential of the Pre-Triassic traps

Crustal structures and salt tectonics on the margins of the western Algerian Basin (Mediterranean Region)

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