A regional-scale discontinuity in western Sicily revealed by a multidisciplinary approach: A new piece for understanding the geodynamic puzzle of the southern Mediterranean

Giuseppe Zarcone, Pietro Renda, Pietro Di Stefano, Dario Luzio, Giuseppe Napoli, Simona Todaro, Pietro Di Stefano, Marco Calò, Laura Parisi, Pietro Renda, Dario Luzio, Rocco Favara, Maria Simona Cacciatore

Risultato della ricerca: Article

13 Citazioni (Scopus)

Abstract

The results of an integrated stratigraphic, structural, geophysical, and geochemical study reveal the presence of a crustal discontinuity in western Sicily that, at present, runs roughly N-S along a band from San Vito Lo Capo to Sciacca. The boundary between the two zones of this discontinuity is nearly orthogonal to the main thrust propagation of the Sicilian thrust-and-fold belt. The different Permian to Tertiary sedimentary evolution recorded by the two zones appears related to this discontinuity, with thick carbonate platforms in the western sector facing deepwater successions in the eastern one. The presence of Upper Triassic reefs, huge megabreccia bodies, and widespread submarine volcanisms along the transition zone suggests the presence of a long-lasting weakness zone. This zone has been reactivated episodically as transpressional and/or transtensional faults in relation to the different geodynamic stress acting in central Mediterranean area in different epochs. We speculate that this transition zone has represented a segment of the passive margin of the Ionian Tethys. During the Maghrebian convergence a different style of deformation has affected the two sectors floored by different sedimentary multilayers. The orthogonal-to-oblique differential convergence between the two sectors has resulted in right-lateral transpressional motions, leading to oblique thrusting of deepwater-derived thrusts onto platform-derived thrusts associated with clockwise rotations. The oblique convergence is still ongoing as demonstrated by the seismicity of the area, by the geothermal field with high mantle-derived helium fluxes and by the GPS measurements collected by different authors.
Lingua originaleEnglish
pagine (da-a)2067-2085
Numero di pagine19
RivistaTectonics
Volume34
Stato di pubblicazionePublished - 2015

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Geodynamics
Geothermal fields
Sicily
Helium
Reefs
Carbonates
geodynamics
thrust
Global positioning system
discontinuity
Multilayers
Fluxes
sectors
transition zone
platforms
megabreccia
Tethys
reefs
fold and thrust belt
passive margin

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cita questo

A regional-scale discontinuity in western Sicily revealed by a multidisciplinary approach: A new piece for understanding the geodynamic puzzle of the southern Mediterranean. / Zarcone, Giuseppe; Renda, Pietro; Di Stefano, Pietro; Luzio, Dario; Napoli, Giuseppe; Todaro, Simona; Di Stefano, Pietro; Calò, Marco; Parisi, Laura; Renda, Pietro; Luzio, Dario; Favara, Rocco; Cacciatore, Maria Simona.

In: Tectonics, Vol. 34, 2015, pag. 2067-2085.

Risultato della ricerca: Article

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title = "A regional-scale discontinuity in western Sicily revealed by a multidisciplinary approach: A new piece for understanding the geodynamic puzzle of the southern Mediterranean",
abstract = "The results of an integrated stratigraphic, structural, geophysical, and geochemical study reveal the presence of a crustal discontinuity in western Sicily that, at present, runs roughly N-S along a band from San Vito Lo Capo to Sciacca. The boundary between the two zones of this discontinuity is nearly orthogonal to the main thrust propagation of the Sicilian thrust-and-fold belt. The different Permian to Tertiary sedimentary evolution recorded by the two zones appears related to this discontinuity, with thick carbonate platforms in the western sector facing deepwater successions in the eastern one. The presence of Upper Triassic reefs, huge megabreccia bodies, and widespread submarine volcanisms along the transition zone suggests the presence of a long-lasting weakness zone. This zone has been reactivated episodically as transpressional and/or transtensional faults in relation to the different geodynamic stress acting in central Mediterranean area in different epochs. We speculate that this transition zone has represented a segment of the passive margin of the Ionian Tethys. During the Maghrebian convergence a different style of deformation has affected the two sectors floored by different sedimentary multilayers. The orthogonal-to-oblique differential convergence between the two sectors has resulted in right-lateral transpressional motions, leading to oblique thrusting of deepwater-derived thrusts onto platform-derived thrusts associated with clockwise rotations. The oblique convergence is still ongoing as demonstrated by the seismicity of the area, by the geothermal field with high mantle-derived helium fluxes and by the GPS measurements collected by different authors.",
author = "Giuseppe Zarcone and Pietro Renda and {Di Stefano}, Pietro and Dario Luzio and Giuseppe Napoli and Simona Todaro and {Di Stefano}, Pietro and Marco Cal{\`o} and Laura Parisi and Pietro Renda and Dario Luzio and Rocco Favara and Cacciatore, {Maria Simona}",
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T1 - A regional-scale discontinuity in western Sicily revealed by a multidisciplinary approach: A new piece for understanding the geodynamic puzzle of the southern Mediterranean

AU - Zarcone, Giuseppe

AU - Renda, Pietro

AU - Di Stefano, Pietro

AU - Luzio, Dario

AU - Napoli, Giuseppe

AU - Todaro, Simona

AU - Di Stefano, Pietro

AU - Calò, Marco

AU - Parisi, Laura

AU - Renda, Pietro

AU - Luzio, Dario

AU - Favara, Rocco

AU - Cacciatore, Maria Simona

PY - 2015

Y1 - 2015

N2 - The results of an integrated stratigraphic, structural, geophysical, and geochemical study reveal the presence of a crustal discontinuity in western Sicily that, at present, runs roughly N-S along a band from San Vito Lo Capo to Sciacca. The boundary between the two zones of this discontinuity is nearly orthogonal to the main thrust propagation of the Sicilian thrust-and-fold belt. The different Permian to Tertiary sedimentary evolution recorded by the two zones appears related to this discontinuity, with thick carbonate platforms in the western sector facing deepwater successions in the eastern one. The presence of Upper Triassic reefs, huge megabreccia bodies, and widespread submarine volcanisms along the transition zone suggests the presence of a long-lasting weakness zone. This zone has been reactivated episodically as transpressional and/or transtensional faults in relation to the different geodynamic stress acting in central Mediterranean area in different epochs. We speculate that this transition zone has represented a segment of the passive margin of the Ionian Tethys. During the Maghrebian convergence a different style of deformation has affected the two sectors floored by different sedimentary multilayers. The orthogonal-to-oblique differential convergence between the two sectors has resulted in right-lateral transpressional motions, leading to oblique thrusting of deepwater-derived thrusts onto platform-derived thrusts associated with clockwise rotations. The oblique convergence is still ongoing as demonstrated by the seismicity of the area, by the geothermal field with high mantle-derived helium fluxes and by the GPS measurements collected by different authors.

AB - The results of an integrated stratigraphic, structural, geophysical, and geochemical study reveal the presence of a crustal discontinuity in western Sicily that, at present, runs roughly N-S along a band from San Vito Lo Capo to Sciacca. The boundary between the two zones of this discontinuity is nearly orthogonal to the main thrust propagation of the Sicilian thrust-and-fold belt. The different Permian to Tertiary sedimentary evolution recorded by the two zones appears related to this discontinuity, with thick carbonate platforms in the western sector facing deepwater successions in the eastern one. The presence of Upper Triassic reefs, huge megabreccia bodies, and widespread submarine volcanisms along the transition zone suggests the presence of a long-lasting weakness zone. This zone has been reactivated episodically as transpressional and/or transtensional faults in relation to the different geodynamic stress acting in central Mediterranean area in different epochs. We speculate that this transition zone has represented a segment of the passive margin of the Ionian Tethys. During the Maghrebian convergence a different style of deformation has affected the two sectors floored by different sedimentary multilayers. The orthogonal-to-oblique differential convergence between the two sectors has resulted in right-lateral transpressional motions, leading to oblique thrusting of deepwater-derived thrusts onto platform-derived thrusts associated with clockwise rotations. The oblique convergence is still ongoing as demonstrated by the seismicity of the area, by the geothermal field with high mantle-derived helium fluxes and by the GPS measurements collected by different authors.

UR - http://hdl.handle.net/10447/147553

UR - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014TC003759

M3 - Article

VL - 34

SP - 2067

EP - 2085

JO - Tectonics

JF - Tectonics

SN - 0278-7407

ER -