Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10305
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dc.contributor.authorallMaesano, F. E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallTiberti, M. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.authorallBasili, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.date.accessioned2016-05-11T12:51:59Zen
dc.date.available2016-05-11T12:51:59Zen
dc.date.issued2016-04-21en
dc.identifier.urihttp://hdl.handle.net/2122/10305en
dc.description.abstractThe Calabrian Subduction Zone plays a key role in the evolution of the central Mediterranean in the framework of the convergence between Africa and Europe. Here, the remnants of the World’s oldest oceanic crust form a narrow NW-dipping slab passively subducting beneath the Calabrian Arc. Recently published high-resolution seismic profiles and bathymetric data of the western Ionian Sea highlight the presence of a NNW-SSE faulting system connected with a series of Plio-Pleistocene syn-tectonic basins. These features are correlated with the recent activity of a major NNW-SSE deformation zone confining the active subduction to the SW and interpreted as a Subduction-Transform Edge Propagator (STEP) fault. The goal of this work is to jointly reconstruct the geometry of the STEP fault and the subduction interface in its surroundings.We use multichannel seismic profiles acquired in the southwestern part of the Calabrian accretionary wedge to focus on the STEP fault geometry at depth and to analyse its relationships with shallow deformation features. The quantitative analysis and enhancement of seismic data provided an accurate image of the internal structure of the accretionary wedge at various depths, showing growth strata in the Plio-Pleistocene succession and major discontinuities in the lower crust. Our results depict a main subvertical, slightly east-dipping, lithospheric fault cutting the oceanic crust down to the Moho, and a rich set of associated secondary synthetic and antithetic faults. This picture also provides new insights on the STEP fault propagation mechanism. In addition, the tridimensional correlation of the STEP fault occurrences in various seismic profiles provides a preliminary scheme of its segmentation and highlights the relationships of this master fault with other main structural elements of the Calabrian Arc and Eastern Sicily, including some of the faults deemed to be responsible for major historical earthquakes in the area.en
dc.description.sponsorshipMultichannel seismic reflection surveys in the Ionian sea are kindly provided by Spectrum under a Confidentiality Agreement (CA-60) with INGV. CROP seismic profiles are provided by CNR-ISMAR. The bathymetric Digital Terrain Model is derived from the EMODnet Bathymetry portal - http://www.emodnet-bathymetry.eu. Midland Valley Ltd is acknowledged for making available the Move software to INGV under Academic Software Initiative (ASI). Ornella Curatolo is acknowledged for the graphic design (http://www.ornellaflora.com) This poster benefits from the financial support of RITMARE, Porto Empedocle, and PON Massimo Projectsen
dc.language.isoEnglishen
dc.relation.ispartofEGU General Assembly 2016, Session TS1.4/GD5.8/SM6.18en
dc.subjectSTEPen
dc.subjectSubductionen
dc.subjectActive tectonicsen
dc.subjectTransform faulten
dc.titleDeep view of the Subduction-Transform Edge Propagator (STEP) fault in the Calabrian Subduction Zoneen
dc.typePoster sessionen
dc.description.statusUnpublisheden
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.09. Structural geologyen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.06. Subduction related processesen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonicsen
dc.description.ConferenceLocationVienna (AT)en
dc.relation.referencesBird, P. (2003). An updated digital model of plate boundaries, Geochem. Geophys. Geosyst., doi: 10.1029/2001GC000252. DISS Working Group (2015). Database of Individual Seismogenic Sources (DISS), Version 3.2.0. http://diss.rm.ingv.it/diss/, DOI:10.6092/INGV.IT-DISS3.2.0. Gallais, F., et al. (2012), Two-stage growth of the Calabrian accretionary wedge in the Ionian Sea (Central Mediterranean): Constraints from depth‐migrated multichannel seismic data, Mar. Geol., doi:10.1016/j.margeo.2012.08.006. Govers R., and Wortel M.J.R. (2005). Lithosphere tearing at STEP faults: Response to edges of subduction zones. Earth and Planetary Science Letters, doi: 10.1016/j.epsl.2005.03.022. Gutscher, M. A., et al. (2015), Tectonic expression of an active slab tear from high‐resolution seismic and bathymetric data offshore Sicily (Ionian Sea), Tectonics, 10.1002/2015TC003898. Polonia, A., et al. (2011), The Calabrian Arc subduction complex in the Ionian Sea: Regional architecture, active deformation, and seismic hazard. Tectonics, doi:10.1029/2010tc002821.en
dc.description.obiettivoSpecifico2T. Tettonica attivaen
dc.description.fulltextopenen
dc.contributor.authorMaesano, F. E.en
dc.contributor.authorTiberti, M. M.en
dc.contributor.authorBasili, R.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italiaen
item.openairetypePoster session-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia-
crisitem.author.orcid0000-0002-5652-1548-
crisitem.author.orcid0000-0003-2504-853X-
crisitem.author.orcid0000-0002-1213-0828-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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