Continental margin large-scale instability controlling the flank sliding of Etna volcano

Chiocci, Francesco Latino; Coltelli, M.; Bosman, Alessandro; Cavallaro, Danilo

doi:10.1016/j.epsl.2011.02.040

Cited by 76 publications

(120 citation statements)

References 23 publications

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“…2). Furthermore, the multi-beam bathymetric map shows an ESE trending lineament at the seafloor at a location which may coincides with an offshore continuation of the suggested terrestrial boundary of the southern fault system (Chiocci et al 2011). Reflection seismic data indicate that the offshore area around the volcano is dominated by extensional faulting, with only a few isolated thrust faults close to the coast at Riposto Ridge (Argnani et al 2013).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Hence, we will here concentrate on the offshore realm, mostly expressed by the continental margin off East Sicily. The large-scale morphology of the margin is characterized by an east oriented convex bulge that hosts high slope gradients of up to 25°, as well as multiple deeply incised gullies and channels between the cities of Catania and Fiumefreddo (Chiocci et al 2011) (Figs. 2, 8).…”

Section: The Architecture Of the Continental Marginmentioning

confidence: 99%

“…South of RR, the massive amphitheater-like structure with an estimated headwall length of ~20 km represents one of the most prominent seafloor features offshore Mt Etna (Chiocci et al 2011;Gross et al 2014) (Fig. 6a).…”

Section: The Amphitheater and The Valle DI Archirafimentioning

confidence: 99%

“…The PFS shows a continuous horizontal displacement of ~2.8 cm/a over the last decades (Groppelli and Tibaldi, 1999) that may even accelerate during volcanic activity (Bonforte et al 2007). The sharp morphologic expression of the PFS vanishes closes to the Ionian coast and can only be traced by small NNE-SSW trending scarps in the shallow offshore realm (Chiocci et al 2011;Argnani et al 2012). The central sector of the instable volcano flank is dominated by the Timpe Fault System (Figs.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Chiocci et al (2011) acquired and used a high-resolution bathymetry for a first interpretation on the continental margin offshore Mt Etna. Chiocci et al (2011) proposed the idea of an upslope propagating instability, caused by a large-scale mass wasting event offshore Mt Etna, creating a prominent amphitheater-like structure off the village of Riposto (Fig. 2).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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

et al. 2016

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The limits of seaward spreading and slope instability at the continental margin offshore Mt Etna, imaged by highresolution 2D seismic data, Tectonophysics (2015Tectonophysics ( ), doi: 10.1016Tectonophysics ( /j.tecto.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A C C E P T E D M A N U S C R I P T -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 ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT2 -A coupled volcano edifice / continental margin instability is proposed 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. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: The Architecture Of the Continental Marginmentioning

confidence: 99%

Section: The Amphitheater and The Valle DI Archirafimentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

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

et al. 2016

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A comprehensive interpretative model of slow slip events on Mt. Etna's eastern flank

Mattia

Bruno

Caltabiano

et al. 2015

Geochem. Geophys. Geosyst.

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Starting off from a review of previous literature on kinematic models of the unstable eastern flank of Mt. Etna, we propose a new model. The model is based on our analysis of a large quantity of multidisciplinary data deriving from an extensive and diverse network of INGV monitoring devices deployed along the slopes of the volcano. Our analysis had a twofold objective: first, investigating the origin of the recently observed slow-slip events on the eastern flank of Mt. Etna; and second, defining a general kinematic model for the instability of this area of the volcano. To this end, we investigated the 2008-2013 period using data collected from different geochemical, geodetic, and seismic networks, integrated with the tectonic and geologic features of the volcano and including the volcanic activity during the observation period. The complex correlations between the large quantities of multidisciplinary data have given us the opportunity to infer, as outlined in this work, that the fluids of volcanic origin and their interrelationship with aquifers, tectonic and morphological features play a dominant role in the large scale instability of the eastern flank of Mt. Etna. Furthermore, we suggest that changes in the strain distribution due to volcanic inflation/deflation cycles are closely connected to changes in shallow depth fluid circulation. Finally, we propose a general framework for both the short and long term modeling of the large flank displacements observed.

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Experimental study of the interplay between magmatic rift intrusion and flank instability with application to the 2001 Mount Etna eruption

et al. 2014

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Mount Etna volcano is subject to transient magmatic intrusions and flank movement. The east flank of the edifice, in particular, is moving eastward and is dissected by the Timpe Fault System. The relationship of this eastward motion with intrusions and tectonic fault motion, however, remains poorly constrained. Here we explore this relationship by using analogue experiments that are designed to simulate magmatic rift intrusion, flank movement, and fault activity before, during, and after a magmatic intrusion episode. Using particle image velocimetry allows for a precise temporal and spatial analysis of the development and activity of fault systems. The results show that the occurrence of rift intrusion episodes has a direct effect on fault activity. In such a situation, fault activity may occur or may be hindered, depending on the interplay of fault displacement and flank acceleration in response to dike intrusion. Our results demonstrate that a complex interplay may exist between an active tectonic fault system and magmatically induced flank instability. Episodes of magmatic intrusion change the intensity pattern of horizontal flank displacements and may hinder or activate associated faults. We further compare our results with the GPS data of the Mount Etna 2001 eruption and intrusion. We find that syneruptive displacement rates at the Timpe Fault System have differed from the preeruptive or posteruptive periods, which shows a good agreement of both the experimental and the GPS data. Therefore, understanding the flank instability and flank stability at Mount Etna requires consideration of both tectonic and magmatic forcing.

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Continental margin large-scale instability controlling the flank sliding of Etna volcano

Cited by 76 publications

References 23 publications

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

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

A comprehensive interpretative model of slow slip events on Mt. Etna's eastern flank

Experimental study of the interplay between magmatic rift intrusion and flank instability with application to the 2001 Mount Etna eruption

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