Options
Giocoli, A.
Loading...
Preferred name
Giocoli, A.
Main Affiliation
4 results
Now showing 1 - 4 of 4
- PublicationOpen AccessUsing the ERT method in tectonically active areas: hints from Southern Apennine (Italy)(2008-11)
; ; ; ; ; ; ; ; ; ; ;Giocoli, A.; Istituto di Metodologie per l’Analisi Ambientale – CNR – Tito (PZ), Italy ;Burrato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Galli, P.; Dipartimento della Protezione Civile, Rome, Italy ;Lapenna, V.; Istituto di Metodologie per l’Analisi Ambientale – CNR – Tito (PZ), Italy ;Piscitelli, S.; Istituto di Metodologie per l’Analisi Ambientale – CNR – Tito (PZ), Italy ;Rizzo, E.; Istituto di Metodologie per l’Analisi Ambientale – CNR – Tito (PZ), Italy ;Romano, G.; Istituto di Metodologie per l’Analisi Ambientale – CNR – Tito (PZ), Italy ;Siniscalchi, A.; Dipartimento di Geologia e Geofisica, Universit`a di Bari, Bari, Italy ;Magrì, C.; Dipartimento di Geologia e Geofisica, Universit`a di Bari, Bari, Italy ;Vannoli, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; ; ; ; ; ; ; ; ; Electrical Resistivity Tomography (ERT) method has been used to study two tectonically active areas of southern Apennine (Caggiano Faults and Ufita Basin). The main aim of this job was to study the structural setting of the investigated areas, i.e. the geometry of the basins at depth, the location of active faults at surface, and their geometrical characterization. The comparison between ERT and trench/drilling data allowed us to evaluate the efficacy of the ERT method in studying active faults and the structural setting of seismogenic areas. In the Timpa del Vento intermontane basin, high resolution ERT across the Caggiano Fault scarps, with different arrays, electrode spacing (from 1 to 10 m) and penetration depth (from about 5 to 40 m) was carried out. The obtained resistivity models allowed us to locate the fault planes along the hillslope and to gather information at depth, as later con-firmed by paleoseismological trenches excavated across the fault trace. In the Ufita River Valley a 3560-m-long ERT was carried out across the basin, joining 11 roll-along multi-channel acquisition system with an electrode spacing of 20mand reaching an investigation depth of about 170 m. The ERT allowed us to reconstruct the geometry and thickness of the Quaternary deposits filling the Ufita Valley. Our reconstruction of the depositional setting is in agreement with an interpretative geological section based on borehole data.323 273 - PublicationRestrictedDetecting young, slow‐slipping active faults by geologic and multidisciplinary high‐resolution geophysical investigations: A case study from the Apennine seismic belt, Italy.(2010-11-09)
; ; ; ; ; ; ; ; ; ; ; ;Improta, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Ferranti, L.; Dipartimento di Scienze della Terra, Università di Napoli, Federico II, Naples, Italy ;De Martini, P. M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Piscitelli, S.; Istituto di Metodologie per l’Analisi Ambientale, CNR, Marsico Nuovo, Potenza, Italy ;Bruno, P. P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Burrato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Civico, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Giocoli, A.; Istituto di Metodologie per l’Analisi Ambientale, CNR, Marsico Nuovo, Potenza, Italy ;Iorio, M.; Istituto Ambiente Marino Costiero, CNR, Naples, Italy ;D'Addezio, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Maschio, L.; Dipartimento di Scienze della Terra, Università di Napoli, Federico II, Naples, Italy; ; ; ; ; ; ; ; ; ; The Southern Apennines range of Italy presents significant challenges for active fault detection due to the complex structural setting inherited from previous contractional tectonics, coupled to very recent (Middle Pleistocene) onset and slow slip rates of active normal faults. As shown by the Irpinia Fault, source of a M6.9 earthquake in 1980, major faults might have small cumulative deformation and subtle geomorphic expression. A multidisciplinary study including morphological-tectonic, paleoseismological, and geophysical investigations has been carried out across the extensional Monte Aquila Fault, a poorly known structure that, similarly to the Irpinia Fault, runs across a ridge and is weakly expressed at the surface by small scarps/warps. The joint application of shallow reflection profiling, seismic and electrical resistivity tomography, and physical logging of cored sediments has proved crucial for proper fault detection because performance of each technique was markedly different and very dependent on local geologic conditions. Geophysical data clearly (1) image a fault zone beneath suspected warps, (2) constrain the cumulative vertical slip to only 25–30 m, (3) delineate colluvial packages suggesting coseismic surface faulting episodes. Paleoseismological investigations document at least three deformation events during the very Late Pleistocene (<20 ka) and Holocene. The clue to surface-rupturing episodes, together with the fault dimension inferred by geological mapping and microseismicity distribution, suggest a seismogenic potential of M6.3. Our study provides the second documentation of a major active fault in southern Italy that, as the Irpinia Fault, does not bound a large intermontane basin, but it is nested within the mountain range, weakly modifying the landscape. This demonstrates that standard geomorphological approaches are insufficient to define a proper framework of active faults in this region. More in general, our applications have wide methodological implications for shallow imaging in complex terrains because they clearly illustrate the benefits of combining electrical resistivity and seismic techniques. The proposed multidisciplinary methodology can be effective in regions characterized by young and/or slow slipping active faults.458 321 - PublicationOpen AccessElectrical resistivity tomography investigations in the ufita Valley (southern Italy).(2008-02)
; ; ; ; ; ; ; ; ; ;Giocoli, A.; IMAA-CNR, Institute of Methodologies for Environmental Analysis (IMAA-CNR), Tito Scalo (PZ), Italy ;Magrì, C.; Dipartimento di Geologia e Geofisica, Università di Bari, Bari, Italy ;Vannoli, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Piscitelli, S.; IMAA-CNR, Institute of Methodologies for Environmental Analysis (IMAA-CNR), Tito Scalo (PZ), Italy ;Rizzo, E.; IMAA-CNR, Institute of Methodologies for Environmental Analysis (IMAA-CNR), Tito Scalo (PZ), Italy ;Siniscalchi, A.; Dipartimento di Geologia e Geofisica, Università di Bari, Bari, Italy ;Burrato, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Basso, C.; Dipartimento di Scienze della Terra, Università degli Studi Federico II, Napoli, Italy ;Di Nocera, S.; Dipartimento di Scienze della Terra, Università degli Studi Federico II, Napoli, Italy; ; ; ; ; ; ; ; Several Electrical Resistivity Tomography (ERT) surveys have been carried out to study the subsurface structural and sedimentary settings of the upper Ufita River valley, and to evaluate their efficiency to distinguish the geological boundary between shallow Quaternary sedimentary deposits and clayey bedrock characterized by moderate resistivity contrast. Five shallow ERTs were carried out across a morphological scarp running at the foot of the northeastern slope of the valley. This valley shoulder is characterized by a set of triangular facets, that some authors associated to the presence of a SW-dipping normal fault. The geological studies allow us to interpret the shallow ERTs results obtaining a resistivity range for each Quaternary sedimentary deposit. The tomographies showed the geometrical relationships of alluvial and slope deposits, having a maximum thickness of 30-40 m, and the morphology of the bedrock. The resistivity range obtained for each sedimentary body has been used for calibrating the tomographic results of one 3560m-long deep ERT carried out across the deeper part of the intramountain depression with an investigation depth of about 170 m. The deep resistivity result highlighted the complex alluvial setting, characterized by alternating fine grained lacustrine deposits and coarser gravelly fluvial sediments.378 621 - PublicationRestrictedAdventive hydrothermal circulation on Stromboli volcano (Aeolian Islands, Italy) revealed by geophysical and geochemical approaches: Implications for general fluid flow models on volcanoes(2010)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Finizola, A.; Laboratoire GéoSciences Réunion, UR, IPGP, UMR 7154, Saint Denis, La Réunion, France ;Ricci, T.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia ;Deiana, R.; Dipartimento di Geoscienze, Università degli Studi di Padova, Padova, Italy ;Barde Cabusson, S.; Dipartimento di Scienze della Terra, Università di Firenze, Firenze, Italy ;Rossi, M.; Dipartimento di Geoscienze, Università degli Studi di Padova, Padova, Italy ;Praticelli, N.; Dipartimento di Geoscienze, Università degli Studi di Padova, Padova, Italy ;Giocoli, A.; Laboratorio di Geofisica, IMAA-CNR, Tito Scalo, Potenza, Italy ;Romano, G.; Tito Scalo, Potenza, Italy ;Delcher, E.; ;Suski, B.; Institut de Géophysique, Université de Lausanne, Lausanne, Switzerland ;Revil, A.; Colorado School of Mines, Illinois St. Golden, Colorado, USA; CNRS-LGIT, UMR 5559, Université de Savoie, Equipe Volcan, Le Bourget du Lac, France ;Menny, P.; Laboratoire Magmas et Volcans, Université Blaise Pascal, Clermont-Ferrand, France ;Di Gangi, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia ;Letort, J.; Ecole et Observatoire des Sciences de la Terre, Université de Strasbourg, France ;Peltier, A.; Institut de Physique du Globe de Paris, UMR 7154, Paris, France ;Villasante-Marcos, V.; Instituto Geografico Nacional, Madrid, Spain ;Douillet, G.; Ecole et Observatoire des Sciences de la Terre, Université de Strasbourg, France ;Avard, G.; Department of Geological Sciences, University of Missouri, USA ;Lelli, M.; Istituto di Geoscienze e Georisorse, CNR, Pisa, Italy; ; ; ; ; ; ; ; ;; ; ; ; ; ; ; ; ; On March 15th 2007 a paroxysmal explosion occurred at the Stromboli volcano. This event generated a large amount of products,mostly lithic blocks, someofwhich impacted the ground as far as down to 200 m a.s.l., about 1.5 kmfaraway fromthe active vents. Two days after the explosion, a newvapouremissionwas discovered on the north-eastern flank of the volcanic edifice, at 560 m a.s.l., just above the area called “Nel Cannestrà”. This new vapour emission was due to a block impact. In order to investigate the block impact area to understand the appearance of the vapour emission, we conducted on May 2008 a multidisciplinary study involving Electrical Resistivity Tomography (ERT), Ground Penetrating Radar (GPR), Self-Potential (SP), CO2 soil diffuse degassing and soil temperature surveys. This complementary data set revealed the presence of an anomalous conductive body, probably related to a shallow hydrothermal level, at about 10–15 m depth, more or less parallel to the topography. It is the first time that such a hydrothermal fluid flow,with a temperature close to thewater boiling point (76 °C) has been evidenced at Stromboli at this low elevation on the flank of the edifice. The ERT results suggest a possible link between (1) the main central hydrothermal system of Stromboli, located just above the plumbing system feeding the active vents, with a maximum of subsurface soil temperature close to 90 °C and limited by the NeoStromboli summit crater boundary and (2) the investigated area of Nel Cannestrà, at ~500 m a.s.l., a buried eruptive fissure active 9 ka ago. In parallel, SP and CO2 soil diffuse degassingmeasurements suggest in this sector at slightly lower elevation fromthe block impact crater a magmatic and hydrothermal fluid rising system along the N41° regional fault. A complementary ERT profile, on May 2009, carried out from the NeoStromboli crater boundary downto the block impact crater displayed a flank fluid flowapparently connected to a deeper system. The concept of shallow hydrothermal level have been compared to similar ERT results recently obtained onMount Etna and La Fossa cone of Vulcano. This information needs to be taken into account in general fluid flow models on volcanoes. In particular, peripheral thermal waters (as those bordering the northeastern coast of Stromboli) could be contaminated by hydrothermal and magmatic fluids coming from regional faults but also from the summit.559 30