The Ionian and Alfeo–Etna fault zones: New segments of an evolving plate boundary in the central Mediterranean Sea?

Polonia, Alina; Torelli, L.; Artoni, Andrea; Carlini, Mirko; Faccenna, Claudio; Ferranti, Luigi; Gasperini, Luca; Govers, Rob; Klaeschen, Dirk; Monaco, Carmelo; Neri, G.; Nijholt, Nicolai; Orecchio, B.; Wortel, Rinus

doi:10.1016/j.tecto.2016.03.016

Cited by 105 publications

(233 citation statements)

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“…Projected MS 27 profile (Finetti & Morelli, ) and ARCHIMEDE Profiles 5 and 6 (Figure ) are used across the Ionian Basin. First‐order structure toward Calabria follows the interpretation of Chamot‐Rooke, Rangin, et al () and Polonia et al ().…”

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiosupporting

confidence: 65%

“…Refraction data of Dellong et al () also image a sharp ocean‐continent transition and the tabular architecture of the Ionian crust. Our section runs south of the Alfeo‐Etna fault system (Figures and ; Polonia et al, ) commonly interpreted as a STEP fault (Cernobori et al, ; Hirn et al, ; Argnani et al, ; see review in Gallais et al, ) and consequently does not show it. Polonia et al () suggested an alternative location for the STEP fault farther east, at the location of the Ionian fault system (Figures and ).…”

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 87%

“…Our section runs south of the Alfeo‐Etna fault system (Figures and ; Polonia et al, ) commonly interpreted as a STEP fault (Cernobori et al, ; Hirn et al, ; Argnani et al, ; see review in Gallais et al, ) and consequently does not show it. Polonia et al () suggested an alternative location for the STEP fault farther east, at the location of the Ionian fault system (Figures and ). Evidence of rifting is recorded in the Late Triassic‐Early Jurassic units over the Malta and Apulian margins (Figures and ), while the first sedimentary sequence mapped over the Ionian Basin is latest Early Jurassic to Middle Jurassic in age (Figures and ).…”

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 87%

“…(c) Transect 3: Cyrenaica margin, Ionian Basin, and Calabrian arc. CAW‐EL: Calabrian Wedge‐Eastern Lobe; CAW‐WL: Calabrian Wedge‐Western Lobe, IFS: Ionian Fault system (after Polonia et al, ).…”

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 99%

“…Simplified structural map of the eastern Mediterranean Basins. AEFA: Alfeo‐Etna Fault system; Ce: Cephalonia Fault; CyR: Cyrenaica Ridge; DaB: Darnah Basin; Era: Eratosthenes; IFS: Ionian Fault System; JAA: Jabal Al Akhdar; Jef: Jeffara Basin; Le: Lebanon; MaB: Marmarica Basin; Pa: Palmyra through (after Arsenikos et al, ; Bosworth et al, ; Chamot‐Rooke, Rangin, et al, ; Frizon de Lamotte et al, ; Gallais et al, ; Polonia et al, , , ; Robertson, ; Tassy et al, , and own observations). Bathymetry from Becker et al ().…”

Section: Introductionmentioning

confidence: 99%

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Geology of the Ionian Basin and Margins: A Key to the East Mediterranean Geodynamics

et al. 2019

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We revisit the nature, structure, and evolution of the Ionian Basin and its surrounding passive margins (Apulia, Eastern Sicily/Malta, and Cyrenaica margins). Relying on geological observations (wells, dredges, and dives) and seismic calibrations from the surrounding platforms and escarpments, we present age correlations for the deepest sedimentary sequences of the Ionian Basin. Two‐ship deep refraction seismic data combined with reprocessed reflection seismic data enable us to identify, characterize, and map these thick sedimentary sequences and to present a consistent seismic stratigraphy across the basin. At a larger scale, we present new geological transects illustrating the tectonostratigraphic relationships between the Ionian Basin and its surrounding rifted margins. On this basis, we suggest that a Late Triassic‐Early Jurassic rifting preceded the late Early Jurassic to Middle Jurassic formation of the Ionian Basin. The combination of geophysical and geological arguments suggests that the entire deep basin is floored with oceanic crust of normal thickness, but with high seismic velocity in the upper part. Upscaling our results in the framework of the eastern Mediterranean, we propose that the Ionian Basin represents the remnant of a short‐lived oceanic basin resulting from the interaction between two propagating oceans: the Central Atlantic and the Neo‐Tethys.

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Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiosupporting

confidence: 65%

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 87%

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 87%

Section: Deep Structure Of the Ionian Basin And Of Its Margins: Regiomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geology of the Ionian Basin and Margins: A Key to the East Mediterranean Geodynamics

et al. 2019

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New structural and seismological evidence and interpretation of a lithospheric-scale shear zone at the southern edge of the Ionian subduction system (central-eastern Sicily, Italy)

et al. 2016

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Geological, gravimetric, and seismological data from the central-eastern Sicily (Italy) provide evidences of a NW-SE oriented shear zone at the southern edge of the Ionian subduction system. This structure consists of a near 100 km long lithospheric-scale structural and seismic boundary. In the near-surface, it shows Plio-Pleistocene vertical-axis structural rotations, kilometer-scale topographic imprint, progressive wrenching, and large down-faulting. All these features, together with its location south-west of the subduction system, allow us to interpret the shear zone as the upper plate expression of an abandoned Subduction Transform Edge Propagator fault, working before slab detachment, currently reactivated by elastic rebound or mantle upwelling mechanism triggered by slab detachment, to form an incipient transform belt separating compartments characterized by different motion in the modern context of Africa-Europe convergence.

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Seismogenic stress field estimation in the Calabrian Arc region (south Italy) from a Bayesian approach

Totaro

Orecchio

Presti

et al. 2016

Geophysical Research Letters

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A new high‐quality waveform inversion focal mechanism database of the Calabrian Arc region has been compiled by integrating 292 mechanisms selected from literature and catalogs with 146 newly computed solutions. The new database has then been used for computation of posterior density distributions of stress tensor components by a Bayesian method never applied in south Italy before the present study. The application of this method to the enhanced database has allowed us to provide a detailed picture of seismotectonic stress regimes in this very complex area where lithospheric unit configuration and geodynamic engines are still strongly debated. Our results well constrain the extensional domain of Calabrian Arc and the compressional one of the southernmost Tyrrhenian Sea. In addition, previously undetected transcurrent regimes have been identified in the Ionian offshore. The new information released here will furnish useful tools and constraints for future geodynamic investigations.

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The Ionian and Alfeo–Etna fault zones: New segments of an evolving plate boundary in the central Mediterranean Sea?

Cited by 105 publications

References 105 publications

Geology of the Ionian Basin and Margins: A Key to the East Mediterranean Geodynamics

Geology of the Ionian Basin and Margins: A Key to the East Mediterranean Geodynamics

New structural and seismological evidence and interpretation of a lithospheric-scale shear zone at the southern edge of the Ionian subduction system (central-eastern Sicily, Italy)

Seismogenic stress field estimation in the Calabrian Arc region (south Italy) from a Bayesian approach

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