The Calabrian Arc: three-dimensional modelling of the subduction interface

Abstract The Calabrian Arc is a one-of-a-kind subduction zone, featuring one of the shortest slab segments (<150 km), one of the thickest accretionary wedges, and one of the oldest oceanic crust in the world. Despite a convergence rate of up to 5 mm/y and well-known intraslab seismicity below 40 ...

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Autores principales:	Francesco E. Maesano, Mara M. Tiberti, Roberto Basili
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a8e037bf1b3a4427b5fa1ab7a5239cb6
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spelling	oai:doaj.org-article:a8e037bf1b3a4427b5fa1ab7a5239cb62021-12-02T12:30:12ZThe Calabrian Arc: three-dimensional modelling of the subduction interface10.1038/s41598-017-09074-82045-2322https://doaj.org/article/a8e037bf1b3a4427b5fa1ab7a5239cb62017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09074-8https://doaj.org/toc/2045-2322Abstract The Calabrian Arc is a one-of-a-kind subduction zone, featuring one of the shortest slab segments (<150 km), one of the thickest accretionary wedges, and one of the oldest oceanic crust in the world. Despite a convergence rate of up to 5 mm/y and well-known intraslab seismicity below 40 km, its shallow interface shows little signs of seismic activity. Nonetheless, it has been attributed as generating historical large earthquakes and tsunamis. To gain insights into this subduction zone, we first made a geological reconstruction of the shallower slab interface (<20 km) and its overlying accretionary wedge by interpreting a grid of 54 seismic reflection lines (8,658 km) with 438 intersections within an area of 105 km2. Then, we constrained a deeper portion of the slab surface (40–350 km) using the seismicity distribution. Finally, we interpolated the two parts to obtain a seamless 3D surface highlighting geometric details of the subduction interface, its lateral terminations and down-dip curvature, and a slab tear at 70–100 km depth. Our 3D slab model of the Calabrian Arc will contribute to understanding of the geodynamics of a cornerstone in the Mediterranean tectonic puzzle and estimates of seismic and tsunami hazards in the region.Francesco E. MaesanoMara M. TibertiRoberto BasiliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Francesco E. Maesano Mara M. Tiberti Roberto Basili The Calabrian Arc: three-dimensional modelling of the subduction interface
description	Abstract The Calabrian Arc is a one-of-a-kind subduction zone, featuring one of the shortest slab segments (<150 km), one of the thickest accretionary wedges, and one of the oldest oceanic crust in the world. Despite a convergence rate of up to 5 mm/y and well-known intraslab seismicity below 40 km, its shallow interface shows little signs of seismic activity. Nonetheless, it has been attributed as generating historical large earthquakes and tsunamis. To gain insights into this subduction zone, we first made a geological reconstruction of the shallower slab interface (<20 km) and its overlying accretionary wedge by interpreting a grid of 54 seismic reflection lines (8,658 km) with 438 intersections within an area of 105 km2. Then, we constrained a deeper portion of the slab surface (40–350 km) using the seismicity distribution. Finally, we interpolated the two parts to obtain a seamless 3D surface highlighting geometric details of the subduction interface, its lateral terminations and down-dip curvature, and a slab tear at 70–100 km depth. Our 3D slab model of the Calabrian Arc will contribute to understanding of the geodynamics of a cornerstone in the Mediterranean tectonic puzzle and estimates of seismic and tsunami hazards in the region.
format	article
author	Francesco E. Maesano Mara M. Tiberti Roberto Basili
author_facet	Francesco E. Maesano Mara M. Tiberti Roberto Basili
author_sort	Francesco E. Maesano
title	The Calabrian Arc: three-dimensional modelling of the subduction interface
title_short	The Calabrian Arc: three-dimensional modelling of the subduction interface
title_full	The Calabrian Arc: three-dimensional modelling of the subduction interface
title_fullStr	The Calabrian Arc: three-dimensional modelling of the subduction interface
title_full_unstemmed	The Calabrian Arc: three-dimensional modelling of the subduction interface
title_sort	calabrian arc: three-dimensional modelling of the subduction interface
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a8e037bf1b3a4427b5fa1ab7a5239cb6
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The Calabrian Arc: three-dimensional modelling of the subduction interface

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