Interference between shallow and deep-seated structures in the Sicilian fold and thrust belt.

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Abstract

The thrust and fold belt, in Western Sicily, is characterized by the presence and interference of “shallow” and “deep-seated” compressional structures, generated and developed at different structural levels.The “shallow structures” consist of imbricated thrusts and asymmetric folds, with a typical wavelength of 2 km, involving relatively thin deep water units. These units are superposed over thick platform carbonates units, along a wide and originally almost flat floor thrust.The axial trend of the folds is variable, since poli-phased folding often occurs, producing characteristic interference pattern, reflecting continuous variations of the “apparent” transport direction during the emplacement (i.e. rotation of the allochtonous thrust sheets).The “deep-seated structures” consist of large, double-verging pop-up structures, with a typical wavelength of 5-10 km, involving thicker platform carbonates successions. The deep-seated structures are characterized by large folds, with vertical to overturned limbs, accomplished by high-angle, transpressive ramps, which reactivate previous (i.e. Mesozoic) synsedimentary normal or transtensional faults. The floor thrust of the shallow structures is passively deformed by the subsequent growing of the underlying, younger deep-seated structures.Large clockwise rotations of the tectonic units occurred during the compressional deformation, and the amount of rotation is apparently related to the timing and amount of the tectonic transport.
Lingua originaleEnglish
pagine (da-a)1-18
Numero di pagine18
RivistaJournal of the Geological Society
Volume167
Stato di pubblicazionePublished - 2010

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fold and thrust belt
thrust
fold
carbonate platform
wavelength
tectonics
folding
limb
emplacement
deep water

All Science Journal Classification (ASJC) codes

  • Geology

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title = "Interference between shallow and deep-seated structures in the Sicilian fold and thrust belt.",
abstract = "The thrust and fold belt, in Western Sicily, is characterized by the presence and interference of “shallow” and “deep-seated” compressional structures, generated and developed at different structural levels.The “shallow structures” consist of imbricated thrusts and asymmetric folds, with a typical wavelength of 2 km, involving relatively thin deep water units. These units are superposed over thick platform carbonates units, along a wide and originally almost flat floor thrust.The axial trend of the folds is variable, since poli-phased folding often occurs, producing characteristic interference pattern, reflecting continuous variations of the “apparent” transport direction during the emplacement (i.e. rotation of the allochtonous thrust sheets).The “deep-seated structures” consist of large, double-verging pop-up structures, with a typical wavelength of 5-10 km, involving thicker platform carbonates successions. The deep-seated structures are characterized by large folds, with vertical to overturned limbs, accomplished by high-angle, transpressive ramps, which reactivate previous (i.e. Mesozoic) synsedimentary normal or transtensional faults. The floor thrust of the shallow structures is passively deformed by the subsequent growing of the underlying, younger deep-seated structures.Large clockwise rotations of the tectonic units occurred during the compressional deformation, and the amount of rotation is apparently related to the timing and amount of the tectonic transport.",
keywords = "D{\'e}collements, Interference, Shallow Structures, Sicily",
author = "Giuseppe Avellone and Attilio Sulli and {Gasparo Morticelli}, Maurizio and Raimondo Catalano and Barchi, {Massimiliano R.}",
year = "2010",
language = "English",
volume = "167",
pages = "1--18",
journal = "Journal of the Geological Society",
issn = "0016-7649",
publisher = "Geological Society of London",

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TY - JOUR

T1 - Interference between shallow and deep-seated structures in the Sicilian fold and thrust belt.

AU - Avellone, Giuseppe

AU - Sulli, Attilio

AU - Gasparo Morticelli, Maurizio

AU - Catalano, Raimondo

AU - Barchi, Massimiliano R.

PY - 2010

Y1 - 2010

N2 - The thrust and fold belt, in Western Sicily, is characterized by the presence and interference of “shallow” and “deep-seated” compressional structures, generated and developed at different structural levels.The “shallow structures” consist of imbricated thrusts and asymmetric folds, with a typical wavelength of 2 km, involving relatively thin deep water units. These units are superposed over thick platform carbonates units, along a wide and originally almost flat floor thrust.The axial trend of the folds is variable, since poli-phased folding often occurs, producing characteristic interference pattern, reflecting continuous variations of the “apparent” transport direction during the emplacement (i.e. rotation of the allochtonous thrust sheets).The “deep-seated structures” consist of large, double-verging pop-up structures, with a typical wavelength of 5-10 km, involving thicker platform carbonates successions. The deep-seated structures are characterized by large folds, with vertical to overturned limbs, accomplished by high-angle, transpressive ramps, which reactivate previous (i.e. Mesozoic) synsedimentary normal or transtensional faults. The floor thrust of the shallow structures is passively deformed by the subsequent growing of the underlying, younger deep-seated structures.Large clockwise rotations of the tectonic units occurred during the compressional deformation, and the amount of rotation is apparently related to the timing and amount of the tectonic transport.

AB - The thrust and fold belt, in Western Sicily, is characterized by the presence and interference of “shallow” and “deep-seated” compressional structures, generated and developed at different structural levels.The “shallow structures” consist of imbricated thrusts and asymmetric folds, with a typical wavelength of 2 km, involving relatively thin deep water units. These units are superposed over thick platform carbonates units, along a wide and originally almost flat floor thrust.The axial trend of the folds is variable, since poli-phased folding often occurs, producing characteristic interference pattern, reflecting continuous variations of the “apparent” transport direction during the emplacement (i.e. rotation of the allochtonous thrust sheets).The “deep-seated structures” consist of large, double-verging pop-up structures, with a typical wavelength of 5-10 km, involving thicker platform carbonates successions. The deep-seated structures are characterized by large folds, with vertical to overturned limbs, accomplished by high-angle, transpressive ramps, which reactivate previous (i.e. Mesozoic) synsedimentary normal or transtensional faults. The floor thrust of the shallow structures is passively deformed by the subsequent growing of the underlying, younger deep-seated structures.Large clockwise rotations of the tectonic units occurred during the compressional deformation, and the amount of rotation is apparently related to the timing and amount of the tectonic transport.

KW - Décollements

KW - Interference

KW - Shallow Structures

KW - Sicily

UR - http://hdl.handle.net/10447/41967

M3 - Article

VL - 167

SP - 1

EP - 18

JO - Journal of the Geological Society

JF - Journal of the Geological Society

SN - 0016-7649

ER -