Neogene to Quaternary tectonics and mud diapirism in the Gulf of Squillace (Crotone-Spartivento Basin, Calabrian Arc, Italy)

Rossella Capozzi, Andrea Artoni, Luigi Torelli, Serena Lorenzini, Davide Oppo, Paola Mussoni, Alina Polonia

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The Calabrian Arc is an arcuate tectonic feature, formed during the Neogene and Pleistocene, as a consequence of the progressive retreat of the Ionian subduction system. It is a key area for understanding the geodynamic evolution of the Mediterranean Sea. The aim of this paper is to investigate the sedimentary dynamics and the possibly active deformation in the Gulf of Squillace and to highlight their relationships with the fluid escape pathways and mud mobilization. The Squillace embayment is a marine area belonging to the forearc basin of the Calabrian Arc, at the seaward prosecution of the Catanzaro depression. By interpreting public seismic profiles, at different resolutions, calibrated by well logs for hydrocarbon exploration, it was possible to define the structural setting and the Neogene and Quaternary stratigraphic architecture. The geologic setting of the Gulf of Squillace shows the occurrence of normal fault systems cutting through both Neogene and Quaternary deposits. During the Messinian, trans-tensional tectonics led to the formation of a basin whose sediments reached the major thickness in the central portion of the embayment. Since the Early Pliocene extensional tectonics was dominant and the basin depocenter progressively changed its orientation, creating a narrow basin roughly oriented NW-SE. Similar tectonic setting was also present during the Pleistocene extension. A Middle to Late Pliocene contractional event led to development of a thrust zone in the northern Crotone swell. Mud diapirs that occur in the external area of the Gulf of Squillace, are located close to the Pliocene and Pleistocene depocenter. The overpressure provided by the Pliocene and Pleistocene sediment accumulation on Messinian and pre-Messinian sediments and the evolution of normal fault systems, triggered the mud diapirs formation that progressively developed toward the upper slope. Extensional deformation and mud diapirism influence the morphologic evolution of the slope and the basin, resulting in the retrogressive erosion of canyon heads and gravity-driven slope failures. ?? 2012 Elsevier Ltd.
Original languageEnglish
Pages (from-to)219-234
Number of pages16
JournalMarine and Petroleum Geology
Volume35
Issue number1
DOIs
Publication statusPublished - Aug 2012

Fingerprint

Calabrian
diapirism
gulfs
mud
Italy
Neogene
tectonics
Messinian
Pliocene
arcs
Pleistocene
depocenter
sediments
basin
normal fault
slopes
sediment
hydrocarbon exploration
tectonic feature
extensional tectonics

Keywords

  • Ionian Sea
  • Mud diapirism
  • Neogene-Quaternary tectonics
  • Offshore Calabrian Arc
  • Seismic reflection

Cite this

Neogene to Quaternary tectonics and mud diapirism in the Gulf of Squillace (Crotone-Spartivento Basin, Calabrian Arc, Italy). / Capozzi, Rossella; Artoni, Andrea; Torelli, Luigi; Lorenzini, Serena; Oppo, Davide; Mussoni, Paola; Polonia, Alina.

In: Marine and Petroleum Geology, Vol. 35, No. 1, 08.2012, p. 219-234.

Research output: Contribution to journalArticle

Capozzi, Rossella ; Artoni, Andrea ; Torelli, Luigi ; Lorenzini, Serena ; Oppo, Davide ; Mussoni, Paola ; Polonia, Alina. / Neogene to Quaternary tectonics and mud diapirism in the Gulf of Squillace (Crotone-Spartivento Basin, Calabrian Arc, Italy). In: Marine and Petroleum Geology. 2012 ; Vol. 35, No. 1. pp. 219-234.
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AU - Oppo, Davide

AU - Mussoni, Paola

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N1 - Acknowledgements We wish to thank ISMAR- Bologna, National Research Council (Italy) and ENI Spa (Italy) for the permission to use the offshore seismic data. We also thank Dirk Klaeschen of the IfM-Geomar (Kiel, Germany) for supporting in the re-processing of the deep crustal seismic line of the CROP Project. Funding was provided by the Italian PRIN 2006 project (MIUR research grants, L. Torelli, R. Capozzi). 2DMove (version 2011.1) has been used for seismic interpretation and mapping.

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N2 - The Calabrian Arc is an arcuate tectonic feature, formed during the Neogene and Pleistocene, as a consequence of the progressive retreat of the Ionian subduction system. It is a key area for understanding the geodynamic evolution of the Mediterranean Sea. The aim of this paper is to investigate the sedimentary dynamics and the possibly active deformation in the Gulf of Squillace and to highlight their relationships with the fluid escape pathways and mud mobilization. The Squillace embayment is a marine area belonging to the forearc basin of the Calabrian Arc, at the seaward prosecution of the Catanzaro depression. By interpreting public seismic profiles, at different resolutions, calibrated by well logs for hydrocarbon exploration, it was possible to define the structural setting and the Neogene and Quaternary stratigraphic architecture. The geologic setting of the Gulf of Squillace shows the occurrence of normal fault systems cutting through both Neogene and Quaternary deposits. During the Messinian, trans-tensional tectonics led to the formation of a basin whose sediments reached the major thickness in the central portion of the embayment. Since the Early Pliocene extensional tectonics was dominant and the basin depocenter progressively changed its orientation, creating a narrow basin roughly oriented NW-SE. Similar tectonic setting was also present during the Pleistocene extension. A Middle to Late Pliocene contractional event led to development of a thrust zone in the northern Crotone swell. Mud diapirs that occur in the external area of the Gulf of Squillace, are located close to the Pliocene and Pleistocene depocenter. The overpressure provided by the Pliocene and Pleistocene sediment accumulation on Messinian and pre-Messinian sediments and the evolution of normal fault systems, triggered the mud diapirs formation that progressively developed toward the upper slope. Extensional deformation and mud diapirism influence the morphologic evolution of the slope and the basin, resulting in the retrogressive erosion of canyon heads and gravity-driven slope failures. ?? 2012 Elsevier Ltd.

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KW - Mud diapirism

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KW - Offshore Calabrian Arc

KW - Seismic reflection

U2 - 10.1016/j.marpetgeo.2012.01.007

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SN - 0264-8172

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