Options
Storti, F.
Loading...
Preferred name
Storti, F.
2 results
Now showing 1 - 2 of 2
- PublicationRestrictedDetachment depth revealed by rollover deformation: An integrated approach at Mount Etna(2010-08-21)
; ; ; ; ; ; ; ;Ruch, J.; Dipartimento di Scienze Geologiche, Università Roma Tre, Rome, Italy ;Acocella, V.; Dipartimento di Scienze Geologiche, Università Roma Tre, Rome, Italy ;Storti, F.; Dipartimento di Scienze Geologiche, Università Roma Tre, Rome, Italy ;Neri, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Pepe, S.; IREA, Consiglio Nazionale delle Ricerche, Naples, Italy ;Solaro, G.; IREA, Consiglio Nazionale delle Ricerche, Naples, Italy ;Sansosti, E.; IREA, Consiglio Nazionale delle Ricerche, Naples, Italy; ; ; ; ; ; Flank instability is common at volcanoes, even though the subsurface structures, including the depth to a detachment fault, remain poorly constrained. Here, we use a multidisciplinary approach, applicable to most volcanoes, to evaluate the detachment depth of the unstable NE flank of Mt. Etna. InSAR observations of Mount Etna during 1995–2008 show a trapdoor subsidence of the upper NE flank, with a maximum deformation against the NE Rift. The trapdoor tilt was highest in magnitude in 2002–2004, contemporaneous with the maximum rates of eastward slip along the east flank. We explain this deformation as due to a general eastward displacement of the flank, activating a rotational detachment and forming a rollover anticline, the head of which is against the NE Rift. Established 2D rollover construction models, constrained by morphological and structural data, suggest that the east‐dipping detachment below the upper NE flank lies at around 4 km below the surface. This depth is consistent with seismicity that clusters above 2–3 km below sea level. Therefore, the episodically unstable NE flank lies above an east‐dipping rotational detachment confined by the NE Rift and Pernicana Fault. Our approach, which combines short‐term (InSAR) and long‐term (geological) observations, constrains the 3D geometry and kinematics of part of the unstable flank of Etna and may be applicable and effective to understand the deeper structure of volcanoes undergoing flank instability or unrest.280 35 - PublicationOpen AccessFirst results from the CROP-11 deep seismic profile, central Apennines, Italy: evidence of mid-crustal folding(2006)
; ; ; ; ; ; ; ; ; ; ; ; ; ;Billi, A.; Dipartimento di Scienze Geologiche, Universita` 'Roma Tre', Rome, Italy ;Tiberti, M. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Cavinato, G. P.; Istituto di Geologia Ambientale e Geoingegneria, CNR, Rome, Italy ;Cosentino, D.; Dipartimento di Scienze Geologiche, Universita` 'Roma Tre', Rome, Italy ;Di Luzio, E.; Istituto di Geologia Ambientale e Geoingegneria, CNR, Rome, Italy ;Keller, J. V. A.; ChevronTexaco Energy Technology Co., San Ramon, CA, USA ;Kluth, C.; Department of Geology and Geological Engineering, Colorado School of Mines, Golden, USA ;Orlando, L.; Dipartimento di Idraulica, Trasporti e Strade, Universita` ‘La Sapienza’, Rome, Italy ;Parotto, M.; Dipartimento di Scienze Geologiche, Universita` 'Roma Tre', Rome, Italy ;Praturlon, A.; Dipartimento di Scienze Geologiche, Universita` 'Roma Tre', Rome, Italy ;Romanelli, M.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy ;Storti, F.; Dipartimento di Scienze Geologiche, Universita` 'Roma Tre', Rome, Italy ;Wardell, N.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy; ; ; ; ; ; ; ; ; ; ; ; The CROP-11 deep seismic profile across the central Apennines, Italy, reveals a previously unknown, mid-crustal antiform here interpreted as a fault-bend fold-like structure. The seismic facies and gravity signature suggest that this structure consists of low-grade metamorphic rocks. Geomorphological, stratigraphic and tectonic evidence in the overlying shallow thrusts suggests that this structure developed in early to mid-Messinian time and grew out of sequence in late Messinian– Pliocene time. The out-of-sequence growth may reflect a taper subcriticality stage of the Apenninic thrust wedge, which induced renewed contraction in the rear.296 869