Large submarine landslides offshore Mt. Etna

Pareschi, M. T.; Boschi, E.; Mazzarini, Francesco; Favalli, Massimiliano

doi:10.1029/2006gl026064

Cited by 43 publications

(38 citation statements)

References 21 publications

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“…So far, it was not possible to determine the exact northern and southern boundaries of the moving flank in the marine realm (Argnani et al 2013). Th b l y f M E ' c l g cu by l g scale submarine mass wasting deposits (Pareschi et al 2006) and small / medium scale debris deposits (Gross et al 2014). …”

Section: Accepted Manuscriptmentioning

confidence: 99%

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%

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 Chiancone, and its submarine extent, has a volume of at least 14 km 3 (Del Negro & Napoli 2002) and is accepted (e.g. Rittmann 1973;McGuire 1982;Guest et al 1984;Calvari & Groppelli 1996;Del Negro & Napoli 2002;Pareschi et al 2006) as representing reworked volcanic products from the Valle del Bove in its upper portion and-in its deeper, unexposed levels-an earlier lateral collapse event, or events, for which the topographic evidence is now lost. Calvari & Groppelli (1996) report a 14 C age of 7.590 ± 0.130 ka BP from a palaeosol about 1 m above a debris flow unit at the base of the exposed portion of the Chiancone.…”

Section: Volcano Lateral Collapse At Mount Etnamentioning

confidence: 99%

Climate forcing of volcano lateral collapse: evidence from Mount Etna, Sicily

Deeming

McGuire

Harrop

2010

Phil. Trans. R. Soc. A.

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In this study, we present evidence for early Holocene climatic conditions providing circumstances favourable to major lateral collapse at Mount Etna, Sicily. The volcano's most notable topographic feature is the Valle del Bove, a 5 × 8 km cliff-bounded amphitheatre excavated from the eastern flank of the volcano. Its origin due to prehistoric lateral collapse is corroborated by stürtzstrom deposits adjacent to the amphitheatre's downslope outlet, but the age, nature and cause of amphitheatre excavation remain matters for debate. Cosmogenic 3 He exposure ages determined for eroded surfaces within an abandoned watershed flanking the Valle del Bove support channel abandonment ca 7.5 ka BP, as a consequence of its excavation in a catastrophic collapse event. Watershed development was largely dictated by pluvial conditions during the early Holocene, which are also implicated in slope failure. A viable trigger is magma emplacement into rift zones in the eastern flank of a water-saturated edifice, leading to the development of excess pore pressures, consequent reduction in sliding resistance, detachment and collapse. Such a mechanism is presented as one potential driver of future lateral collapse in volcanic landscapes forecast to experience increased precipitation or melting of ice cover as a consequence of anthropogenic warming.

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“…Considering the presence of morpho-structural steps near the coast and the different depth of the base of the CH to the west (about 300 m, below the sea level) and to the east, off the coast line (at about 100 m below the sea level) of these steps, the possibility that the impact of the mass of the detritus, although quite modest, falling into the Ionian Sea may have caused a tsunami wave (Pareschi et al, 2006) big enough to affect the central-eastern Mediterranean about 8 000 years B.P. is excluded, in our opinion.…”

Section: Discussionmentioning

confidence: 99%