Recent inversion of the Tyrrhenian Basin

Zitellini, Nevio; Ranero, César R.; Loreto, Maria Filomena; Ligi, Marco; Pastore, Marco; D’Oriano, Filippo; Sallarès, Valentı́; Grevemeyer, Ingo; Moeller, Stefan; Prada, Manel

doi:10.1130/g46774.1

Cited by 33 publications

(27 citation statements)

References 30 publications

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“…This complex terrane structuration involves a tectonic and magmatic evolution not fully understood. The NW Calabrian margin integrates the evolution of extended continental crust possibly by a Miocene to younger rift (Kastens and Mascle et al, 1990), modified by the emplacement of the volcanic arc, and the development of the Plio-Quaternary Paola basin, currently in a forearc position, with up to 5 km infill (Zitellini et al, 2020) that extends towards the NW of our transect (Fig. 1 and 3).…”

Section: Alpine Subduction Systemsmentioning

confidence: 83%

“…Stampfli et al, 1998;Polonia et al, 2011;Marroni et al, 2017), determining thereby, the pre-collisional structuration of the lithosphere. The Gibraltar and Calabrian backarcs are no longer opening, and their domains are currently being inverted, which may indicate a current initial phase of a collision (Giaconia et al, 2015;Zitellini et al, 2020). Yet, the structure of Alpine-type belts has been associated to the imbrication of the domains formed during continental rifting (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system

Prada

Ranero

Sallarès

et al. 2020

Earth and Planetary Science Letters

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The formation of Cenozoic mountain belts in the Mediterranean realm was preceded by tens of millions of years of subduction, forming volcanic arcs, and frontal contractional systems. In addition, subduction usually involves slab rollback and formation of oceanic backarcs. Although such structure must have influenced the orogeny of Mediterranean mountain belts, no active analog has been mapped with modern crustal-scale seismic methods. Here, we study the entire Calabrian subduction system to map the structure resulting from Tethys lithosphere subduction and slab roll back, in a process that must be akin to that operating during a phase of the formation of the Mediterranean orogenic belts. We present a crustal-scale cross section of the entire Calabrian subduction system obtained from on-and offshore wide-angle seismic data. The 2D P-wave velocity section shows spatially abrupt (< 5 km of profile distance) structural and petrological transitions from the Ionian sedimentary wedge and Calabrian arc, to the rifted NW Calabrian margin, where the Quaternary Aeolian arc is emplaced. The margin, then, transitions northwards into the Marsili backarc region, where exhumed mantle and localized volcanism occurred during its formation. This complex structure implies rapid temporal and spatial changes between magmatic and amagmatic processes, and between compressional and extensional regimes during the evolution of this subduction system. We find that some terranes involved in the Alpine orogeny share petrological and tectonic similarities with some domains of the Calabrian subduction system. Based on the results of this study we propose the Calabrian Arc system as an analog for the subduction structuration that preceded the formation of Alpine orogenic systems.

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Section: Alpine Subduction Systemsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system

Prada

Ranero

Sallarès

et al. 2020

Earth and Planetary Science Letters

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“…Despite several studies conducted in the last decades (Argnani & Trincardi, 1988;Gamberi & Rovere, 2010;Guarnieri, 2006;Loreto et al, 2013;Milia et al, 2009;Pepe et al, 2010;Zitellini et al, 2019) the tectonostratigraphic evolution of the Paola Basin, the 3-D geometries and depositional settings of its sedimentary infill, the source areas of sediments, and the processes responsible for sediment dispersion along the margin are still poorly known. Furthermore, the role of contractional, extensional, and strike-slip tectonics inside and along the flanks of the basin is not well understood, as witnessed by the different interpretations proposed.…”

Section: 1029/2019tc005898mentioning

confidence: 99%

“…Forearc basins formed along the Tyrrhenian and Ionian margins of the N-CPA since the Late Oligocene. The Paola Basin is a roughly NNW-SSE trending, ∼20 km wide asymmetric syncline developed on the Tyrrhenian side of the N-CPA sector from the Neogene to Recent times (Argnani & Trincardi, 1988;Guarnieri, 2006;Milia et al, 2009;Pepe et al, 2010;Zitellini et al, 2019). Oligocene to Quaternary sediments fill the basin (Bigi et al, 1989).…”

Section: Forearc Basinsmentioning

confidence: 99%

3‐D Architecture and Plio‐Quaternary Evolution of the Paola Basin: Insights Into the Forearc of the Tyrrhenian‐Ionian Subduction System

et al. 2020

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Using seismic reflection profiles and bathymetric data, we analyzed the stratigraphy and tectonics of the Paola Basin, providing information on the dynamic of the forearc of the Tyrrhenian-Ionian subduction system. The Paola Basin is a NNW-SSE trending syncline, bounded by the Coastal Chain to the east and the Paola Anticline to the west. It hosts up to 5.2 km thick Plio-Quaternary deposits, most of them supplied from Apenninic/Sila entry points and transported by longshore currents. The total subsidence reaches a value of ∼5 km. The sedimentary load varies from 60% to 75% of the total subsidence. The Pliocene to Lower Pleistocene sedimentary infill of the syncline displays a strata growth geometry consistent with a continuous rotation of the eastern limb of the Paola Anticline. Crustal folding can explain both the tectonic subsidence of the Paola Basin and the uplift of the Paola Anticline. To the east of the basin, Late Pliocene to Early Pleistocene growth of the central sector of the Coastal Chain led to the definition of the Paola and Crati basins, previously connected in a larger proto basin. The trench-parallel component of the plate movement was accommodated by a strike-slip zone, with associated releasing and restraining bends coinciding with the Paola Anticline. The bathymetric expression of the strike-slip zone consists of structural highs and depressions that overall form the Paola Ridge. Since the Middle Pleistocene, the growth of the Paola Anticline and Paola Basin came to an end and extensional tectonics controlled the evolution of the forearc region.

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“…The reactivation of the Algerian margin is causing uplift along the costal domain (onshore and offshore) (Strzerzynski et al, 2010;Yelles et al, 2009), as predicted by models of subduction initiation (e.g., Faccenna et al, 1999;Mart et al, 2005). A similar tectonic pattern is also observed offshore northern Sicily, where plate convergence is mainly accommodated along an E-W trending active thrust system that reactivates inherited faults of southern Tyrrhenian (Billi et al, 2007(Billi et al, , 2011D'Agostino & Selvaggi, 2004;Goes et al, 2004;Zitellini et al, 2020). As in northern Algeria, northern Sicily is undergoing a recent uplift (Holocene age), which has been proposed to result from an early stage of contraction, before a foreseeable subduction initiation (Billi et al, 2007).…”

Section: Introductionmentioning

confidence: 83%

Quaternary Seismostratigraphy and Tectonosedimentary Evolution of the North Tunisian Continental Margin

2020

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Northern Tunisia contains the poorly defined boundary between the Nubia and Eurasian plates. Offshore north Tunisia, the continental margin is interpreted to be part of the North Africa collisional fold and thrust belt system, linking the Maghrebian and the Sicilian-Apennine chains. The Tunisia margin deforms by a slow NW-SE trending convergence resulting in a diffuse deformation zone with scarce and scattered seismicity, in contrast to the neighboring regions of north Algeria and north Sicily. The complex recent evolution of this region is poorly known due to the paucity of studies, particularly offshore in the north Tunisian continental margin. Here, we present the seismostratigraphic analysis of the last~1.8 Ma tectonosedimentary evolution of this area. The seismostratigraphic analysis supports that individual Quaternary depocenters developed syntectonic to faulting and that faulting influenced sedimentation patterns. We identify an abrupt variation in the sediment accumulation rates (SARs) coeval to a change in the strata geometry of the units located near faults at 402 ± 5 ka (mid-Middle Pleistocene), supporting a change in the rate of faulting associated to contraction tectonics. This change indicates that deformation is controlled by the NW-SE convergence between Nubia and Eurasia, probably accelerated at the end of extension in the Tyrrhenian back-arc. Therefore, the current driving mechanism in the Central Mediterranean is possibly lithospheric collision between Nubia and Eurasia.

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Recent inversion of the Tyrrhenian Basin

Cited by 33 publications

References 30 publications

The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system

The structure of Mediterranean arcs: New insights from the Calabrian Arc subduction system

3‐D Architecture and Plio‐Quaternary Evolution of the Paola Basin: Insights Into the Forearc of the Tyrrhenian‐Ionian Subduction System

Quaternary Seismostratigraphy and Tectonosedimentary Evolution of the North Tunisian Continental Margin

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