From stretching to mantle exhumation in a triangular backarc basin (Vavilov basin, Tyrrhenian Sea, Western Mediterranean)

Milia, Alfonsa; Torrente, Maurizio M.; Tesauro, Magdala

doi:10.1016/j.tecto.2016.10.017

Cited by 22 publications

(41 citation statements)

References 78 publications

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“…Furthermore, the Vavilov basin is seen to be a Lower Pliocene detachment fault responsible for the exhumation of mantle rocks underlying extensional allochthonous blocks made up of Alpine rocks [ Mascle and Rehault , ; Milia et al ., ]. A continental nature of the crust of Vavilov basin has been recently proposed using geophysical and geological approaches [ Milia et al ., , ; Prada et al ., ]. Milia et al .…”

Section: Geological and Geodynamic Backgroundmentioning

confidence: 98%

“…Milia et al . [] described the anatomy and mode of extension of the Vavilov, a fossil back‐arc basin, triangle‐shaped (approximately 240 km wide and 200 km long), located between Sardinia margin to the west and Campania margin to the east. They documented rift and supradetachment basins, and the extension of the triangular basin was synchronous from the apex to distal regions around a single Euler pole located in Latium, between 5.1 and 1.8 Ma.…”

Section: Geological and Geodynamic Backgroundmentioning

confidence: 99%

“…Notably, the present physiography is principally a product of the Pliocene‐Quaternary back‐arc evolution that led to the formation of two large bathyal basins (Vavilov and Marsili basins) and several peri‐Tyrrhenian basins (Figure a). Recent tectonostratigraphic analyses of the sedimentary basins of the southern Tyrrhenian Sea [ Milia et al ., , , , , ] reconstructed a polyphase extensional evolution with location of rifting and kinematic changes over time.…”

Section: Introduction and Aims Of The Workmentioning

confidence: 99%

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Pliocene‐Quaternary orogenic systems in Central Mediterranean: The Apulia‐Southern Apennines‐Tyrrhenian Sea example

2017

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In the Central Mediterranean the Africa‐Eurasia convergence led to the development of complex orogenic systems and back‐arc basins. Throughout Pliocene‐Quaternary times the Southern Apennines accretionary prism migrated toward the Apulia foreland and, contemporaneously, the Tyrrhenian Sea back‐arc basin opened. In this study, we investigated the offshore of the southern Apulia foreland and the Southern Apennines. Using seismic reflection profiles and well data in a dedicated GIS software, we made a detailed stratigraphic analysis, reconstructed the structural pattern, and built 2‐D geological models of the main geological surfaces. The structure of the Apulia region formed during two main tectonic stages: lower Pleistocene complex extensional faulting developed in a transtensional regime and middle‐upper Pleistocene transpression/shortening. The Southern Apennines accretionary prism developed through the Pliocene‐early lower Pleistocene and was overprinted by late lower Pleistocene‐middle Pleistocene NW‐SE sinistral faults. Through linking new data from the accretionary prism and the foreland with previous information from the Tyrrhenian Sea back‐arc, we provide an original interpretation for the relationships between the various provinces that make the Central Mediterranean crustal puzzle and reconstruct the main phases of the evolution of its Pliocene‐Quaternary orogenic cycle. We recognized collisional stages of uncoupled plates, followed by late lower‐middle Pleistocene postcollisional stages of coupled continental plates. This Pleistocene plate reorganization of Central Mediterranean was probably due to the rupture of the Apulia/Ionian slab or to NNW intraplate shortening transmitted from Africa.

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Section: Geological and Geodynamic Backgroundmentioning

confidence: 98%

Section: Geological and Geodynamic Backgroundmentioning

confidence: 99%

Section: Introduction and Aims Of The Workmentioning

confidence: 99%

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Pliocene‐Quaternary orogenic systems in Central Mediterranean: The Apulia‐Southern Apennines‐Tyrrhenian Sea example

2017

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“…The Mediterranean system shows numerous examples of subcontinental mantle exhumation in back‐arc continental rifted margins (Figure ). The progressive westward roll‐back of the Apennines slab, starting at around 30 Ma, leads to the successive opening of the Liguro‐Provencal basin and the Tyrrhenian sea (Faccenna et al, ), in which subcontinental mantle exhumation to the surface has been documented (Bache et al, ; Milia et al, , Figure ). The process of extreme continental lithosphere thinning at rifted margin is now well understood (Brun & Beslier, ; Gueydan et al, ; Gueydan & Précigout, ; Huismans & Beaumont, ) and provides a mechanism for subcontinental mantle lithosphere exhumation during lithosphere thinning, such as in the back‐arc rifted margin of the central Mediterranean.…”

Section: Introductionmentioning

confidence: 99%

Western Mediterranean Subcontinental Mantle Emplacement by Continental Margin Obduction

et al. 2019

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Obduction is the tectonic process that results from thrusting of an oceanic lithosphere section (ophiolite) onto a continent. In contrast, thrusting of subcontinental mantle, observed in several mountain belts, remains a major unknown of plate tectonics. In the western Mediterranean, the Ronda and Beni Bousera peridotites are the largest worldwide subcontinental mantle exposure. From a geological point of view, the Ronda peridotites are exhumed by hyperstretching of the continental lithosphere in a back‐arc immediately followed by thrusting, explaining their present‐day position inside the Alboran crust. Using 2‐D and 3‐D modeling of new gravimetric data combined with local seismic tomography, we show that the Ronda peridotites are rooted inside the Alboran mantle along the entire Gibraltar arc. On these bases, we propose that the emplacement of the Ronda peridotites occurred in a back‐arc setting and corresponds to the thrusting of an entire hyper‐stretched continental margin onto a continent, a process that we define as continental margin obduction. This results from two successive deformation events: continental upper plate extension driven by slab roll‐back, immediately followed by upper plate shortening, likely triggered when a buoyant continental domain enters the subduction. We propose that this process affected the entire western Alboran domain, with peridotite bodies embedded within the crust along the whole Gibraltar Arc. We suggest that other examples such as the Alps Ivrea mantle body could likely represent continental margin obduction at the onset of continental collision.

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“…This model is supported by numerous geological evidence: During Quaternary Campania margin was the site of a poliphased rifting that produced a complex fault pattern (Figure a). Lower Pleistocene NW‐SE normal faults and NE trending transfer faults formed throughout the eastward migration of the Tyrrhenian Sea backarc extension (Milia, ; Milia & Torrente, ; Milia et al, 2013, ; Milia, Torrente, & Tesauro, ). These faults have been reactivated during a Middle Pleistocene SE directed extension phase.…”

Section: Problems and Contradictions In The Stratigraphic And Tectonimentioning

confidence: 99%

Comment on “The Campi Flegrei Deep Drilling Project (CFDDP): New Insight on Caldera Structure, Evolution and Hazard Implications for the Naples Area (Southern Italy)” by G. De Natale et al.

Torrente

Milia

2018

Geochem Geophys Geosyst

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The paper by De Natale et al. (2016, https://doi.org/10.1002/2015GC006183) reported new stratigraphic and geochronological data for a borehole located at Campi Flegrei volcanic area. The authors failed to mention several significant articles on the geological evolution of the region and proposed an interpretation of their data according to the caldera model. Herein, we provide tectonic and stratigraphic data to support a fault model of ignimbrite emission. This comment will also show the inconsistency of the proposed Campi Flegrei caldera.

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From stretching to mantle exhumation in a triangular backarc basin (Vavilov basin, Tyrrhenian Sea, Western Mediterranean)

Cited by 22 publications

References 78 publications

Pliocene‐Quaternary orogenic systems in Central Mediterranean: The Apulia‐Southern Apennines‐Tyrrhenian Sea example

Pliocene‐Quaternary orogenic systems in Central Mediterranean: The Apulia‐Southern Apennines‐Tyrrhenian Sea example

Western Mediterranean Subcontinental Mantle Emplacement by Continental Margin Obduction

Comment on “The Campi Flegrei Deep Drilling Project (CFDDP): New Insight on Caldera Structure, Evolution and Hazard Implications for the Naples Area (Southern Italy)” by G. De Natale et al.

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