| Registro completo |
| Provedor de dados: |
5
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| País: |
France
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| Título: |
Tectonic expression of an active slab tear from high-resolution seismic and bathymetric data offshore Sicily (Ionian Sea)
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| Autores: |
Gutscher, Marc-andre
Dominguez, Stephane
Mercier De Lepinay, Bernard
Pinheiro, Luis
Gallais, Flora
Babonneau, Nathalie
Cattaneo, Antonio
Le Faou, Yann
Barreca, Giovanni
Micallef, Aaron
Rovere, Marzia
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| Data: |
2016-01-06
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| Ano: |
2016
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| Palavras-chave: |
Slab tear
Subduction
Mediterranean
Bathymetry
Seismics
Active faults
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| Resumo: |
Subduction of a narrow slab of oceanic lithosphere beneath a tightly curved orogenic arc requires the presence of at least one lithospheric scale tear fault. While the Calabrian subduction beneath southern Italy is considered to be the type example of this geodynamic setting, the geometry, kinematics and surface expression of the associated lateral, slab tear fault offshore eastern Sicily remain controversial. Results from a new marine geophysical survey conducted in the Ionian Sea, using high-resolution bathymetry and seismic profiling reveal active faulting at the seafloor within a 140 km long, two-branched fault system near Alfeo Seamount. The previously unidentified 60 km long NW trending North Alfeo Fault system shows primarily strike-slip kinematics as indicated by the morphology and steep-dipping transpressional and transtensional faults. Available earthquake focal mechanisms indicate dextral strike-slip motion along this fault segment. The 80 km long SSE trending South Alfeo fault system is expressed by one or two steeply dipping normal faults, bounding the western side of a 500+ m thick, 5 km wide, elongate, syntectonic Plio-Quaternary sedimentary basin. Both branches of the fault system are mechanically capable of generating magnitude 6-7 earthquakes like those that struck eastern Sicily in 1169, 1542, and 1693.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00318/42924/42421.pdf
https://archimer.ifremer.fr/doc/00318/42924/44984.pdf
DOI:10.1002/2015TC003898
https://archimer.ifremer.fr/doc/00318/42924/
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| Editor: |
Amer Geophysical Union
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| Relação: |
info:eu-repo/grantAgreement/EC/FP7/603839/EU//ASTARTE
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| Formato: |
application/pdf
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| Fonte: |
Tectonics (0278-7407) (Amer Geophysical Union), 2016-01-06 , Vol. 35 , N. 1 , P. 39-54
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| Direitos: |
2015. American Geophysical Union. All Rights Reserved.
info:eu-repo/semantics/openAccess
restricted use
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