14 results on '"Natale, Jacopo"'
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2. Geomorphic analysis of digital elevation model generated from vintage aerial photographs: A glance at the pre-urbanization morphology of the active Campi Flegrei caldera
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Natale, Jacopo, Vitale, Stefano, Repola, Leopoldo, Monti, Lucia, and Isaia, Roberto
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- 2024
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3. Delineation and Fine‐Scale Structure of Fault Zones Activated During the 2014–2024 Unrest at the Campi Flegrei Caldera (Southern Italy) From High‐Precision Earthquake Locations.
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Scotto di Uccio, Francesco, Lomax, Anthony, Natale, Jacopo, Muzellec, Titouan, Festa, Gaetano, Nazeri, Sahar, Convertito, Vincenzo, Bobbio, Antonella, Strumia, Claudio, and Zollo, Aldo
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FAULT zones ,SEISMIC event location ,CALDERAS ,VOLCANIC eruptions ,EARTHQUAKE zones ,STRESS concentration ,EARTHQUAKES - Abstract
In the past two decades, the central portion of Campi Flegrei caldera has experienced ground uplift up to 15 mm/month, with an increase of rate, magnitude and extent of the seismicity. In this work, we perform multi‐scale precise earthquake relocation of the 2014–2024 seismicity, mapping in detail activated fault zones. We relate the geometry, extent, and depth of these zones with up‐to‐date structural reconstructions of the caldera. The current seismicity is mainly driven by ground‐uplift‐induced stress concentration on pre‐existing, weaker fault zones, some of which identified for the first time. These structures are not only related to the inner caldera and dome resurgence but also to volcano‐tectonic events of the last 10 ka. The extent of imaged fault segments suggests they can accommodate ruptures up to a moment magnitude 5.1, significantly increasing seismic hazard in the area. Plain Language Summary: During the past 2 yrs, there has been a marked increase in ground uplift, number and size of earthquakes at Campi Flegrei caldera. This increase in activity has raised concerns among the population and public authorities about the impact of seismic activity on buildings and infrastructure in the area and about the best actions to undertake during the seismic emergency to reduce the risk. Additionally, the possibility of a future volcanic eruption is being considered, although currently geochemical and geophysical monitoring shows no unequivocal signs of precursory phenomena. In this work, we map the last decade of seismicity with a new technique providing high‐precision earthquake locations that allow us to unveil the currently activated fault zones of the inner caldera. The results show a near‐elliptical distribution of seismicity at the global scale of the caldera, which at a smaller scale delineates complex seismogenic structures. The size of imaged faults suggests that earthquakes up to a moment magnitude 5.1 can occur, significantly increasing seismic hazard in the area. Key Points: High‐precision location of 2014–2024 seismicity in Campi Flegrei depicts active fault zones with unprecedented detailSeismicity occurs along different volcano‐tectonic structures including the caldera inner ring fault zone and faults bounding the Solfatara craterA new structure has been recognized in the eastern sector of the caldera, hosting the largest magnitude event in the analyzed period [ABSTRACT FROM AUTHOR]
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- 2024
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4. Paleogeographic and Tectonic Evolution of the Earliest Wedge-Top Basin in the Southern Apennines: New Insights from the Paleocurrent Analysis of the Cilento Group Deposits (Southern Italy)
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Mehmood, Mubashir, primary, Ciarcia, Sabatino, additional, Lo Schiavo, Luca, additional, Natale, Jacopo, additional, and Vitale, Stefano, additional
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- 2023
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5. The Taverna San Felice Dike (NE of Roccamonfina Volcano): Unraveling Magmatic Intrusion Processes and Volcano‐Tectonics in the Tyrrhenian Margin of the Southern Apennines
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Natale, Jacopo, primary, Vitale, Stefano, additional, Giordano, Guido, additional, Fedele, Lorenzo, additional, Lucci, Federico, additional, Vona, Alessandro, additional, Prinzi, Ernesto Paolo, additional, Tramparulo, Francesco D’Assisi, additional, Isaia, Roberto, additional, and Ciarcia, Sabatino, additional
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- 2023
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6. The deep structure of the Campi Flegrei caldera by magnetotelluric survey
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Isaia, Roberto, De Paola, Claudio, Di Giuseppe, Maria Giulia, Natale, Jacopo, Troiano, Antonio, and Vitale, Stefano
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Electromagnetic imaging can proficiently detect deep structures in volcanic environments. A magnetotelluric (MT) survey has been performed in the Campi Flegrei volcanic environment, crossing the caldera through the main, recent volcano-tectonic structures and intersecting the most active sector of the Solfatra-Agnano zone. The electromagnetic reconstruction of the volcano’s internal structure points out the configuration of the plumbing system and the main structures for the ascent of magma and magmatic fluids, at least below a large continental portion of the caldera. The preliminary picture of the electrical resistivity distribution with depth suggests that the CF caldera plumbing system appears to be formed by distinct branches with a shallower geothermal system well developed below the Solfatara-Agnano area fed by a deeper source. The primary fault system, acting as a preferential pathway for magmatic fluids, is also identified. The resistivity model allows (i) to constrain the main electromagnetic features of the caldera and (ii) to delineate significant clues about its structural setting.This new picture represents a relevant contribution furnished by MT observations for hazard assessment at Campi Flegrei and can enhance the modeling of the driving mechanisms of the ongoing unrest., The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
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- 2023
7. Evidence of Seismic-Related Liquefaction Processes within the Volcanic Record of the Campi Flegrei Caldera (Italy)
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Vitale, Stefano, primary, Natale, Jacopo, additional, Isaia, Roberto, additional, Tramparulo, Francesco D’Assisi, additional, and Ciarcia, Sabatino, additional
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- 2022
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8. Late Miocene-Early Pliocene Out-of-Sequence Thrusting in the Southern Apennines (Italy)
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Vitale, Stefano, primary, Prinzi, Ernesto Paolo, additional, Tramparulo, Francesco D’Assisi, additional, De Paola, Claudio, additional, Di Maio, Rosa, additional, Piegari, Ester, additional, Sabbatino, Monia, additional, Natale, Jacopo, additional, Notaro, Pasqualino, additional, and Ciarcia, Sabatino, additional
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- 2020
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9. The use and beauty of ultra-high-resolution seismic reflection imaging in Late Quaternary marine volcaniclastic settings, Napoli Bay, Italy
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Sacchi, Marco, primary, Caccavale, Mauro, additional, Corradino, Marta, additional, Esposito, Giuseppe, additional, Ferranti, Luigi, additional, Hámori, Zoltán, additional, Horváth †, Ferenc, additional, Insinga, Donatella, additional, Marino, Camilla, additional, Matano, Fabio, additional, Molisso, Flavia, additional, Natale, Jacopo, additional, Passaro, Salvatore, additional, Pepe, Fabrizio, additional, and Tóth, Tamás, additional
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- 2019
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10. Structural frame and volcano-tectonic evolution of the Campi Flegrei collapse caldera-resurgent dome system in the Pozzuoli bay based on multiscale seismic profiles analysis.
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Natale, Jacopo, Ferranti, Luigi, Marino, Camilla, and Sacchi, Marco
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STRUCTURAL frames , *VOLCANIC eruptions , *SUBMARINE geology , *VOLCANOES , *SEISMIC surveys , *VOLCANOLOGY , *CALDERAS - Abstract
The present study aims at contributing to the structural framework and volcano-tectonic evolution of the Campi Flegrei caldera with a joint analysis of multi-scale seismic profiles in the Pozzuoli Bay, providing additional insights into the last ~15 ky of ground deformation.Only in recent years the submerged part of the caldera has been explored using marine geophysical data (Sacchi et al., 2014; Steinmann et al., 2016, 2018). Seismo-stratigraphic interpretation of the marine geophysical data revealed that, after the NYT eruption, rejuvenation of the activity occurred mainly along the ring faults while a resurgent central dome system was gradually developing. The shallowest seismo-stratigraphic interval has been calibrated by marine gravity cores which allowed to identify key horizons between the AD 1538 Monte Nuovo tephra to Nisida tephra ~3.9 ky. Chronostratigraphy of the deeper part of the caldera infill sequence has been inferred through tentative correlation with the most significant eruptions known on-land taking into account vent location, VEI, distribution of pyroclastic deposits and hiatuses developed during periods of relative volcanic rest (Smith et al., 2011; Steinmann et al., 2018). In addition to the volcano-tectonic events, the depositional environment has been affected by post-glacial sea-level rise as reconstructed by Lambeck et al. (2011). This work provides a first detailed map of faults developed on top of the resurgent dome and an improved characterization of the ring faults, on the southern side of the caldera. The apical faults of the dome have a complex pattern with NNE-SSW dominating trend. Since ~12 ky a total uplift of ~130 m is estimated between the post collapse un-deformed and dome-deformed markers.On the eastern side of the gulf has been defined timing and extension of a laccolite intrusion. On the western side, the Punta Pennata structure has been mapped and interpreted as a localized structure linked to magma migration in the footwall of the collapse ring fault.ReferencesLambeck, K., Antonioli, F., Anzidei, M., Ferranti, L., Leoni, G., Scicchitano, G., & Silenzi, S. (2011). Sea level change along the Italian coast during the Holocene and projections for the future. Quaternary International, 232(1-2), 250-257.Sacchi, M., Pepe, F., Corradino, M., Insinga, D. D., Molisso, F., & Lubritto, C. (2014). The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15 ky. Marine Geology, 354, 15-33.Smith, V. C., Isaia, R., & Pearce, N. J. G. (2011). Tephrostratigraphy and glass compositions of post-15 kyr Campi Flegrei eruptions: implications for eruption history and chronostratigraphic markers. Quaternary Science Reviews, 30(25-26), 3638-3660.Steinmann, L., Spiess, V., & Sacchi, M. (2016). The Campi Flegrei caldera (Italy): formation and evolution in interplay with sea-level variations since the Campanian Ignimbrite eruption at 39 ka. Journal of Volcanology and Geothermal Research, 327, 361-374.Steinmann, L., Spiess, V., & Sacchi, M. (2018). Post-collapse evolution of a coastal caldera system: Insights from a 3D multichannel seismic survey from the Campi Flegrei caldera (Italy). Journal of Volcanology and Geothermal Research, 349, 83-98. [ABSTRACT FROM AUTHOR]
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- 2019
11. Evidence of Seismic-Related Liquefaction Processes within the Volcanic Record of the Campi Flegrei Caldera (Italy)
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Stefano Vitale, Jacopo Natale, Roberto Isaia, Francesco D’Assisi Tramparulo, Sabatino Ciarcia, Vitale, Stefano, Natale, Jacopo, Isaia, Roberto, Tramparulo, FRANCESCO D'ASSISI, and Ciarcia, Sabatino
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sand dike ,caldera ,General Earth and Planetary Sciences ,Campi Felgrei ,sand liquefaction ,volcanoes ,sand dikes - Abstract
We report the occurrence of several sand liquefaction structures, such as sand dikes, in the stratigraphic record of the Campi Flegrei volcano, located both inside and outside the caldera. Five sites were analyzed within the caldera and two outside. The grain size analysis of the sand fillings indicates that these deposits are very fine-to-coarse sands generally poorly sorted. All of the granulometry curves fall within the field of the liquefiable, loose sediments. Frequently, dikes are characterized by two fillings: a rim showing poorly sorted finer sands and a core with extremely poorly sorted coarser sediments. We suggest that seismic-related liquefaction processes triggered the injection of these sand dikes during unrest episodes in the last 15 kyr. In particular, the sand dikes located outside the caldera, characterized by larger thicknesses and lengths, mark an important extensional episode, probably associated with the caldera formation during the Neapolitan Yellow Tuff eruption at 15 ka. Furthermore, liquefaction structures within the caldera are related to the seismic activity, probably occurring during the Agnano–Monte Spina caldera formation and the volcano-tectonic ground deformation, predating Epoch 3b (4.3 ka) and the Monte Nuovo (1538 CE) eruptions. This study highlights that these seismic-related liquefaction structures are common within the volcanic record of the Campi Flegrei, suggesting that the sand source can be both the widespread marine succession underlying the Epoch 3 deposits in the caldera central sector and the primary ash layers extensively present in the volcanic record.
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- 2022
12. Volcano‐Tectonic Setting of the Pisciarelli Fumarole Field, Campi Flegrei Caldera, Southern Italy: Insights Into Fluid Circulation Patterns and Hazard Scenarios
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Antonio Troiano, Jacopo Natale, Maria Giulia Di Giuseppe, Roberto Isaia, Stefano Vitale, Francesco D'Assisi Tramparulo, Isaia, Roberto, Giulia Di Giuseppe, Maria, Natale, Jacopo, Tramparulo, FRANCESCO D'ASSISI, Troiano, Antonio, and Vitale, Stefano
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geography ,geography.geographical_feature_category ,Fluid circulation ,Hazard ,Fumarole ,Tectonics ,Geophysics ,Volcano ,Geochemistry and Petrology ,Volcano tectonics ,Campi Flegrei, volcano, Pisciarelli, structural geology, volcano-tectonics, geophysics ,Caldera ,Geology ,Seismology - Abstract
Phreatic and hydrothermal eruptions are small energetic explosive events that generally have few to no precursors and represent a considerable hazard in tourist and urban areas. At the Campi Flegrei caldera, these events have occurred at the Solfatara volcano and have likely occurred at the nearby Pisciarelli site, where the most powerful hydrothermal phenomena are located. Here, increased hydrothermal activity has caused relevant morphological changes that has led local authorities to deny access to the site. Stratigraphic, structural, and geophysical investigations have allowed us to reconstruct the volcano-tectonic setting of the area. In particular, we have recognized a fault system and related damage zones that act as the preferred pathway for hydrothermal fluids in the caldera. At the surface, these faults control the migration and/or accumulation of deep-seated gases into the subsoil and the formation of fumaroles and mud pools. We have recognized two main fault systems with different ages that show variable displacements. The electrical anomalies identified by electrical resistivity tomography further highlight the main fault pattern and show the interplay between volcano-tectonic structures and fluid circulation. Host rocks and fault zones may be involved in self-sealing processes and/or rock failure phenomena capable of modifying the fluid pathways and establishing favorable conditions, leading to overpressure and/or rapid decompression of fluids and triggering an explosive event. Furthermore, stratigraphic mapping shows fossil mud pool sediments embedded in an old debris flow located above the modern hydrothermal system. This implies that they were at a higher elevation when they formed. The morphotectonic evolution and intense rock alterations in the area could promote further landslide episodes, producing debris-flow deposits that can cover the active area and possibly trigger hydrothermal/ phreatic events.
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- 2021
13. Late Miocene-Early Pliocene Out-of-Sequence Thrusting in the Southern Apennines (Italy)
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Pasqualino Notaro, Ester Piegari, Sabatino Ciarcia, Rosa Di Maio, Jacopo Natale, Monia Sabbatino, Stefano Vitale, Ernesto Paolo Prinzi, Francesco D'Assisi Tramparulo, Claudio De Paola, Vitale, Stefano, Paolo Prinzi, Ernesto, D’Assisi Tramparulo, Francesco, De Paola, Claudio, DI MAIO, Rosa, Piegari, Ester, Sabbatino, Monia, Natale, Jacopo, Notaro, Pasqualino, and Ciarcia, Sabatino
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southern Apennines, out‐of‐sequence thrust, wedge‐top basin, electrical resistivity tomography ,geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Paleozoic ,Outcrop ,out-of-sequence thrust ,Inversion (geology) ,lcsh:QE1-996.5 ,Late Miocene ,Structural basin ,Fault (geology) ,wedge-top basin ,010502 geochemistry & geophysics ,01 natural sciences ,southern Apennines ,lcsh:Geology ,Paleontology ,Basement (geology) ,electrical resistivity tomography ,General Earth and Planetary Sciences ,Mesozoic ,Geology ,0105 earth and related environmental sciences - Abstract
We present a structural study on late Miocene-early Pliocene out-of-sequence thrusts affecting the southern Apennine orogenic belt. The analyzed structures are exposed in the Campania region (southern Italy). Here, thrusts bound the N-NE side of the carbonate ridges that form the regional mountain backbone. In several outcrops, the Mesozoic carbonates are superposed onto the unconformable wedge-top basin deposits of the upper Miocene Castelvetere Group, providing constraints to the age of the activity of this thrusting event. Moreover, a 4-km-long N-S oriented electrical resistivity tomography profile, carried out along the Caserta mountains, sheds light on the structure of this thrust system in an area where it is not exposed. Further information was carried out from a tunnel excavation that allowed us to study some secondary fault splays. The kinematic analysis of out-of-sequence major and minor structures hosted both in the hanging wall (Apennine Platform carbonates) and footwall (Castelvetere Group deposits and Lagonegro-Molise Basin units) indicates the occurrence of two superposed shortening directions, about E-W and N-S, respectively. We associated these compressive structures to an out-of-sequence thrusting event defined by frontal thrusts verging to the east and lateral ramp thrusts verging to the north and south. We related the out-of-sequence thrusting episode to the positive inversion of inherited normal faults located in the Paleozoic basement. These envelopments thrust upward to crosscut the allochthonous wedge, including, in the western zone of the chain, the upper Miocene wedge-top basin deposits.
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- 2020
14. The use and beauty of ultra-high-resolution seismic reflection imaging in Late Quaternary marine volcaniclastic settings, Napoli Bay, Italy
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Giuseppe Esposito, Flavia Molisso, M. Corradino, Jacopo Natale, Donatella Insinga, Salvatore Passaro, Zoltán Hámori, Luigi Ferranti, Ferenc Horváth, Marco Sacchi, Mauro Caccavale, Fabrizio Pepe, Tamás Tóth, Camilla Marino, Fabio Matano, Sacchi, Marco, Caccavale, Mauro, Corradino, Marta, Esposito, Giuseppe, Ferranti, Luigi, Hámori, Zoltán, Horváth †, Ferenc, Insinga, Donatella Domenica, Marino, Camilla, Matano, Fabio, Molisso, Flavia, Natale, Jacopo, Passaro, Salvatore, Pepe, Fabrizio, Tóth, Tamás, and Insinga, Donatella
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Settore GEO/02 - Geologia Stratigrafica E Sedimentologica ,Settore GEO/03 - Geologia Strutturale ,Stratigraphy ,Volcaniclastic settings ,Pyroclastic rock ,Fault (geology) ,Paleontology ,Geochemistry and Petrology ,Pumice ,Campania Volcanism ,Stratovolcano ,Somma-Vesuvius ,high-resolution single channel reflection seismics, Campania Volcanism, Volcaniclastic settings, Campi Flegrei, Caldera ring fault, Somma-Vesuvius, Late Quaternary, Bay of Naples ,geography ,geography.geographical_feature_category ,Continental shelf ,Resurgent dome ,Caldera ring fault ,Geology ,Late Quaternary ,Seafloor spreading ,Volcano ,High-resolution single channel reflection seismics ,Bay of Naples ,Campi Flegrei - Abstract
A Nápolyi-öbölben felvett ultra nagy felbontású egycsatornás (IKB-Seistec™) reflexiós szeizmikus szelvények korábbi geológiai és geofizikai vizsgálatok eredményeivel együtt kivételes, eddig soha nem látott felbontású szeizmikus leképezését nyújtják a Flegrei-mezők és a Somma-Vezúv felszín alá süllyedt késő-pleisztocén–holocén rétegtani felépí - tésének. A szeizmikus szelvényeken látott geometria és gravitációs magvevővel nyert üledékek adatainak összevetéséből Campania partközeli kontinentális talapzatán számos olyan üledékes és vulkáni szerkezet, valamint hidrotermális jelenség került leképezésre, melyek a legutolsó glaciális maximum (kb. 18 000 év) óta keletkeztek. A Pozzuoli-öbölben mért Seistec szelvények jól mutatják a beomlott kaldera gyűrűs vetőjét, a kb. 15 ezer éves Nápolyi Sárga Tufa (NYT) lerakódáshoz vezető kitöréskor felújuló boltozatot, és alátámasztják a deformáció későnegyedidőszaki korára és stílusára vonatkozó hipotéziseket. A szeizmikus szelvényeken látható a NYT rétegeinek töréses szerkezete, valamint hidrotermális fluidum-feláramlások és vulkáni/szubvulkáni intrúziók a gyűrűs vetők mentén. A Somma-Vezúv rétegvulkán előterében a kontinentális talapzat felett mért szeizmikus szelvények leképezték a Vezúv i.sz. 79-es kitörésekor Herculaneum városát elpusztító piroklaszt-ár tengervízbe érésekor keletkező, gravitációsan összeomló homokhullámok szerkezetét is. A Somma-Vezúv és a Pozzuoli-öböl közti, buckás felszínű Banco della Montagna területén mért szelvények és fúrómagok vulkanoklasztos diapírok sorát tárták fel. Ezeket a konszolidálatlan horzsakőből álló testeket a fluidum - feláramlás és aktív kigázosodás hatására kialakult mélybeli túlnyomás hozta fel a tengerfenékre. Very high-resolution, single channel (IKB-Seistec™) reflection seizmic profiles acquired in the Bay of Naples, com - plemented with geological and geophysical data from the literature, provide unprecedented, superb seismic imaging of the latest Pleistocene–Holocene stratigraphic architecture of the submerged sectors Campi Flegrei and Somma-Vesuvius volcanic districts. Seismic profiles were calibrated by gravity core data and document a range of depositional systems, volcanic structures and hydrothermal features that evolved after the onset of the Last Glacial Maximum (~ 18 ka BP) over the continental shelf on the Campania coastal zone. Seistec profiles from the Pozzuoli Bay yield high-resolution images of the shallow structure of the collapse caldera-ring fault — resurgent dome system associated with the eruption of the Neapolitan Yellow Tuff (NYT) (ca 15 ka) and support a working hypothesis to assess the timing and the styles of deformation of the NYT resurgent structure throughout the latest Quaternary. Seismic images also revealed the nature of the fragile deformation of strata along the NYT ring fault system and the occurrence of hydrothermal fluids and volcanic/subvolcanic intrusions ascending along the ring fault zone. Seismic data acquired over the continental shelf off the Somma-Vesuvius stratovolcano, display evidence of gravit - ational instability of wavy bedforms representing the submarine prosecution of pyroclastic flows originated from the Vesuvius during the eruption that destroyed the Roman city of Herculaneum in 79 CE. At the Banco della Montagna, a hummocky seafloor knoll located between the Somma-Vesuvius and the Pozzuoli Bay, seismic profiles and gravity core data revealed the occurrence of a field of volcaniclastic diapirs formed by the dragging and rising up of unconsolidated pumice, as a consequence of fluid overpressure at depth associated with active degassing and fluid venting at the seafloor.
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- 2019
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