A seismic reflection study of the External Calabrian Arc in the northern Ionian Sea (eastern Mediterranean)

Rossi, Sergio; Sartori, R.

doi:10.1007/bf00286036

Cited by 102 publications

(93 citation statements)

References 15 publications

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“…2a, S. P. 1900-2500) and a series of topographic lows in the EL, known as "intermediate depressions" (Fig. 2b, S. P. 2300-2500) after Rossi and Sartori (1981). These features are the seafloor expression of three major deeply rooted thrust faults well imaged on deep penetration seismic profiles as continuous, high amplitude and landward dipping seismic reflectors.…”

Section: Splay Fault Systemmentioning

confidence: 94%

“…depth of the basal detachment, geometry and structural style of different tectonic domains, and location and geometry of major faults. High-resolution multi-channel seismic (MCS) profiles (CALAMARE dataset), Sparker data acquired by IGM (now ISMAR-Bo) in the Ionian Sea during the 1970s (Rossi and Sartori, 1981), sub-bottom CHIRP profiles recently acquired in key areas of the CA (Fig. 3) and multibeam data integrate deep seismic data and constrain the fine structure of the accretionary wedge as well as the activity of individual fault strands.…”

Section: Methodsmentioning

confidence: 99%

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Active faults and historical earthquakes in the Messina Straits area (Ionian Sea)

Polonia

Torelli

Gasperini

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. The Calabrian Arc (CA) subduction complex is located at the toe of the Eurasian Plate in the Ionian Sea, where sediments resting on the lower plate have been scraped off and piled up in the accretionary wedge due to the African/Eurasian plate convergence and back arc extension. The CA has been struck repeatedly by destructive historical earthquakes, but knowledge of active faults and source parameters is relatively poor, particularly for seismogenic structures extending offshore. We analysed the fine structure of major tectonic features likely to have been sources of past earthquakes: (i) the NNW-SSE trending Malta STEP (Slab Transfer Edge Propagator) fault system, representing a lateral tear of the subduction system; (ii) the out-of-sequence thrusts (splay faults) at the rear of the salt-bearing Messinian accretionary wedge; and (iii) the Messina Straits fault system, part of the wide deformation zone separating the western and eastern lobes of the accretionary wedge.Our findings have implications for seismic hazard in southern Italy, as we compile an inventory of first order active faults that may have produced past seismic events such as the 1908, 1693 and 1169 earthquakes. These faults are likely to be source regions for future large magnitude events as they are long, deep and bound sectors of the margin characterized by different deformation and coupling rates on the plate interface.

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Section: Splay Fault Systemmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Active faults and historical earthquakes in the Messina Straits area (Ionian Sea)

Polonia

Torelli

Gasperini

et al. 2012

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Along the external margin of Calabria, the thrust-belt basins can be regarded as piggy-back basins and "harmonica basins" upon the accretionary thrust wedge (Van Dijk and Okkes, 1988,199O;Van Dijk, 1994). The CrotoneSpartivento Basin, along the external margin of Calabria, is a typical fore-arc basin (Rossi and Sartori, 1981;Van Dijk, 1990. The latter author speculated that the present-day onshore part of this basin is situated upon a shallow slab, facing the subduction through and detached at a depth of about 2 km ("detached slab basin").…”

Section: Geological Structure and Evolution Of The Central Mediterraneanmentioning

confidence: 99%

Neotectonic rotations in the Calabrian Arc; implications for a Pliocene-Recent geodynamic scenario for the Central Mediterranean

Dijk¹,

Scheepers²

1995

Earth-Science Reviews

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Recently, new data have been presented which imply that major block rotations took place in the Central Mediterranean during the Pleistocene, between 1.0 and 0.7 Ma. Kinematic solutions for the spatial and temporal distribution of rotational data in the Central Mediterranean such as oroclinal bending of the Calabrian Arc and rotation of the Adria Plate are being discussed. Phases of neotectonic rotations appear to be confined to distinct phases of contractions and compressive interplate stress. We present a model in which the middle Pleistocene rotations are caused by a distribution of deformation in the Central Mediterranean through strike-slip motions along a number of major shear zones which define a free boundary between the African and the Adria Plates. One of the main features is the Trans-Mediterranean Mobile Zone, which separates areas with opposite rotations. The timing of the rotations is compared to the evolution of volcanism, basin development, subsidence and uplift patterns, contractional tectonics and seismicity patterns. From this comparison we hypothesize that the Late Pliocene-Recent geodynamic evolution of the Central Mediterranean comprises the following three episodes: (1) A Late Pliocene arc migration episode shows drifting of the Calabrian block and spreading of the back-arc basin without the associated oroclinal rotations that were previously assumed in literature. (2) An Early Pleistocene contraction episode shows a gradual increase of compressive interplate stress, and culminates in a middle Pleistocene "stress release phase" which is associated with block rotations, transpressional tectonics and a rupturing of the subducted slab. (3) A Late Pleistocene-Recent restabilisation episode is characterized by rapid isostatic adjustments, with extensional collapse of the Apennine thrust-wedge and the Tyrrhenian back-arc area related to rebound of non-detached lithosphere remnants and sinking into the mantle of the detached slab.

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“…The whole sector becomes then a sort of lateral ramp for the pure thrust deformations occurring presently off the Ionian side of the Calabrian Arc (Rossi and Sartori, 1981) at the hinge zone of the southern arcuate orogen (Fig. 5).…”

Section: Outline Of the Perityrrhenian Neogene Chains In Relation To mentioning

confidence: 99%

The Main Results of ODP Leg 107 in the Frame of Neogene to Recent Geology of Perityrrhenian Areas

Sartori¹

1990

Proceedings of the Ocean Drilling Program, 107 Scientific Results

102

115

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A seismic reflection study of the External Calabrian Arc in the northern Ionian Sea (eastern Mediterranean)

Cited by 102 publications

References 15 publications

Active faults and historical earthquakes in the Messina Straits area (Ionian Sea)

Active faults and historical earthquakes in the Messina Straits area (Ionian Sea)

Neotectonic rotations in the Calabrian Arc; implications for a Pliocene-Recent geodynamic scenario for the Central Mediterranean

The Main Results of ODP Leg 107 in the Frame of Neogene to Recent Geology of Perityrrhenian Areas

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