The limits of seaward spreading and slope instability at the continental margin offshore Mt Etna, imaged by high-resolution 2D seismic data.

Gross, Felix, Krastel, Sebastian, Geersen, Jacob, Behrmann, Jan Hinrich, Ridente, Domenico, Chiocci, Francesco Latino, Bialas, Jörg, Papenberg, Cord, Cukur, Deniz, Urlaub, Morelia and Micallef, Aaron (2016) The limits of seaward spreading and slope instability at the continental margin offshore Mt Etna, imaged by high-resolution 2D seismic data. Tectonophysics, 667 . pp. 63-76. DOI 10.1016/j.tecto.2015.11.011.

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Supplementary data:

Abstract

Highlights:
- Analysis of a combined new high-resolution 2D seismic and bathymetric data set offshore Mt Etna
- Extensional domains are mapped at the shallow subsurface of the continental margin
- Compressional structures are mapped at the toe of the continental margin
- A coupled volcano edifice / continental margin instability is proposed

Mount Etna is the largest active volcano in Europe. Instability of its eastern flank is well documented onshore, and continuously monitored by geodetic and InSAR measurements. Little is known, however, about the offshore extension of the eastern volcano flank, defining a serious shortcoming in stability models. In order to better constrain the active tectonics of the continental margin offshore the eastern flank of the volcano, we acquired a new high-resolution 2D reflection seismic dataset. The data provide new insights into the heterogeneous geology and tectonics at the continental margin offshore Mt Etna. The submarine realm is characterized by different blocks, which are controlled by local- and regional tectonics. A compressional regime is found at the toe of the continental margin, which is bound to a complex basin system. Both, the clear link between on- and offshore tectonic structures as well as the compressional regime at the easternmost flank edge, indicate a continental margin gravitational collapse as well as spreading to be present at Mt Etna. Moreover, we find evidence for the offshore southern boundary of the moving flank, which is identified as a right lateral oblique fault north of Catania Canyon. Our findings suggest a coupled volcano edifice / continental margin instability at Mt Etna, demonstrating first order linkage between on- and offshore tectonic processes.

Document Type: Article
Additional Information: WOS:000378099700005
Keywords: Mt Etna, Flank Instability, Continental Margin, Tectonics, Spreading, Reflection Seismics, RV Meteor, M86/2
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R06
Kiel University > Faculty of Mathematics and Natural Sciences > Institute of Geosciences
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.tecto.2015.11.011
ISSN: 0040-1951
Projects: Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 04 Dec 2015 12:06
Last Modified: 03 May 2017 11:58
URI: http://oceanrep.geomar.de/id/eprint/30418

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