Volcanism in slab tear faults is larger than in island-arcs and back-arcs

Cocchi, L.; Passaro, Salvatore; Tontini, F. Caratori; Ventura, Guido

doi:10.1038/s41467-017-01626-w

Cited by 38 publications

(39 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This hypothetical result must not be intended in a hazard perspective but serves to depict the possible consequence of large collapses on a seamount in the Tyrrhenian basin. Indeed, there are several other volcanic structures in the Tyrrhenian basin (see Rovere et al 2016;Cocchi et al 2017; see also the recent contribution by Gallotti et al 2020 on tsunami potential from the Palinuro complex), and their nature and eruption history are still poorly known. Considering the well-known active volcanoes in the Aeolian archipelago, there is the need for intensifying studies to assess the overall hazard posed by these submarine and island volcanoes and, in particular, the hazard related to tsunami generation.…”

Section: Discussionmentioning

confidence: 99%

Tsunamis from prospected mass failure on the Marsili submarine volcano flanks and hints for tsunami hazard evaluation

et al. 2020

View full text Add to dashboard Cite

The Marsili Seamount (Tyrrhenian Sea, Italy) is the largest submarine volcano in the Mediterranean Sea, located in the middle of the Marsili Basin, facing the Calabrian and Sicilian coasts on its eastern side, and the coasts of Sardinia on the opposite side. It has erupted in historical times, and its summit crest is affected by widespread hydrothermal activity. This study looks at mass failures taking place at different depths on the flanks of the volcano and estimates their associated tsunamigenic potential. Mass failure, tsunami generation, and propagation have been simulated by means of numerical models developed by the Tsunami Research Team of the University of Bologna. In all, we consider five cases. Of these, three scenarios, one regarding a very small detachment and two medium-sized ones (between 2 and 3 km3 failure volume), have been suggested as possible failure occurrences in the published literature on a morphological basis and involve the north-eastern and north-western sectors of the volcano. The two additional cases, one medium-sized and one extreme, intended as a possible worst-case scenario (volume 17.6 km3), affecting the eastern flank. Results indicate that small-volume failures are not able to produce significant tsunamis; medium-size failures can produce tsunamis which dangerously affect the coasts if their detachment occurs in shallow water, i.e., involves the volcano crest; and extreme volume failures have the potential to create disastrous tsunamis. In all the simulations, tsunami waves appear to reach the Aeolian Islands in around 10 min and the coasts of Calabria and Sicily in 20 min. This study highlights that there is a potential for dangerous tsunamis generation from collapses of the Marsili volcano and as a consequence a need to intensify research on its status and stability conditions. More broadly, this investigation should also be extended to the other volcanic seamounts of the Tyrrhenian Sea, since their eruptive style, evolution, and tsunamigenic potential are still poorly known.

show abstract

Section: Discussionmentioning

confidence: 99%

Tsunamis from prospected mass failure on the Marsili submarine volcano flanks and hints for tsunami hazard evaluation

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In addition, to the north of the Calabria, there is no slab at present. Thus, the Calabrian slab is limited by two tectonic lines along which huge volcanic activity has occurred (Palinuro seamount chain) or continues to occur (Etna and Vulcano) [22]. The roll-back ended 700 Ka, since the Calabro-Peloritan arc also crashed against the northern Greece crust.…”

Section: Area Of Study-the Italian Geological Frameworkmentioning

confidence: 99%

Fusion of GNSS and Satellite Radar Interferometry: Determination of 3D Fine-Scale Map of Present-Day Surface Displacements in Italy as Expressions of Geodynamic Processes

2019

View full text Add to dashboard Cite

We present a detailed map of ground movement in Italy derived from the combination of the Global Navigation Satellite System (GNSS) and Satellite Synthetic Aperture Radar (SAR) interferometry. These techniques are two of the most used space geodetic techniques to study Earth surface deformation. The above techniques provide displacements with respect to different components of the ground point position; GNSSs use the geocentric International Terrestrial Reference System 1989 (ITRS89), whereas the satellite SAR interferometry components are identified by the Lines of Sight (LOSs) between a satellite and ground points. Moreover, SAR interferometry is a differential technique, and for that reason, displacements have no absolute reference datum. We performed datum alignment of InSAR products using precise velocity fields derived from GNSS permanent stations. The result is a coherent ground velocity field with detailed boundaries of velocity patterns that provide new information about the complex geodynamics involved on the Italian peninsula and about local movements.

show abstract

“…Finally, the modern subducting slab is bounded by two main tear faults (Subduction Transform-Edge Propagators, STEP) (Fig. 1a): (1) the Tindari-Letojanni fault to the south 41 ; and (2) a main northern fault not uniquely defined, i.e., the Sangineto Line 41 with its offshore prolongation beneath the Palinuro volcanic complex 42 ; or the more southern Catanzaro shear zone 43 .…”

Section: Geological Backgroundmentioning

confidence: 99%

Fault-controlled deep hydrothermal flow in a back-arc tectonic setting, SE Tyrrhenian Sea

Loreto

Doǧan

Üner

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

Understanding magmatic systems and deep hydrothermal circulation beneath arc-volcanoes provides insights into deep processes associated with slab-subduction and mantle-wedge partial melting. Here we analyze hydrothermal flow below a structural high (Capo Vaticano Ridge, CVR) located offshore Capo Vaticano (western Calabria) and affected by magmatic intrusions generated from above the Ionian subducting-slab. In order to explain observations, we combine geophysical and numerical modelling results. Fluid-flow modelling shows that temperature distribution and geothermal gradient are controlled mainly by hydrothermal circulation, in turn affected by heat source, fault pattern, rock permeability, basement topography and sediment thickness. Two main faults, shaping the structural high and fracturing intensely the continental crust, enable deep hydrothermal circulation and shallow fluid discharge. Distribution of seismicity at depth supports the hypothesis of a slab below Capo Vaticano, deep enough to enable mantle-wedge partial melting above the subduction zone. Melt migration at shallow levels forms the magmatic intrusions inferred by magnetic anomalies and by δ3He enrichment in the discharged fluids at the CVR summit. Our results add new insights on the southern Tyrrhenian Sea arc-related magmatism and on the Calabrian inner-arc tectonic setting dissected by seismogenic faults able to trigger high-destructive earthquakes.

show abstract

Volcanism in slab tear faults is larger than in island-arcs and back-arcs

Cited by 38 publications

References 53 publications

Tsunamis from prospected mass failure on the Marsili submarine volcano flanks and hints for tsunami hazard evaluation

Tsunamis from prospected mass failure on the Marsili submarine volcano flanks and hints for tsunami hazard evaluation

Fusion of GNSS and Satellite Radar Interferometry: Determination of 3D Fine-Scale Map of Present-Day Surface Displacements in Italy as Expressions of Geodynamic Processes

Fault-controlled deep hydrothermal flow in a back-arc tectonic setting, SE Tyrrhenian Sea

Contact Info

Product

Resources

About