Renewed ground uplift at Campi Flegrei caldera (Italy): New insight on magmatic processes and forecast

Troise, Claudia; Natale, Giuseppe De; Pingue, F.; Obrizzo, F.; Martino, Prospero De; Tammaro, Umberto; Boschi, E.

doi:10.1029/2006gl028545

Cited by 99 publications

(83 citation statements)

References 25 publications

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“…After 1984, the ground slowly subsided until [2004][2005], when a new of deformation phase and enhanced hydrothermalism started (Troise et al, 2007), with~0.10 m of uplift at the end of 2013.…”

Section: Ground Deformation In the Pozzuoli Areamentioning

confidence: 99%

The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15ky

et al. 2014

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In this study we integrate high-resolution swath bathymetry, single channel reflection seismic data and gravity core data, to provide new insights into the shallow structure and latest Quaternary to Holocene evolution of the submerged sector of the Neapolitan Yellow Tuff (NYT) caldera (Campi Flegrei) in the Pozzuoli Bay. The new data allow for a reconstruction of the offshore geometry of the NYT caldera collapse-ring fault system, along with the style and timing of deformation of the inner caldera resurgence. Our interpretation shows that the NYT eruption (~15 ka BP) was associated with a caldera collapse bounded by an inward-dipping ring fault system. The ring fault system consists in a 1-2 km wide fault zone that encircles an inner caldera region~5 km in diameter and is often marked by the occurrence of pore fluids ascending through the fault zone, up to the seafloor, particularly in the western sector of the bay. A shallow magmatic intrusion along the ring fault zone was also detected offshore Bagnoli in the eastern part of the Pozzuoli Bay. Following the NYT eruption, the inner caldera region underwent significant deformation and resurgence with a maximum cumulative uplift of the offshore structure in the order of 180 m. The net uplift rate of the caldera resurgent dome was~9-12 mm/year during the period 15.0-6.6 ka BP. The style of deformation of the resurgent structure can be described in terms of a broad doming, accompanied by subordinate brittle deformation, mostly concentrated in a small apical graben at the summit of the resurgent dome. Chronostratigraphic calibration of seismic profiles obtained by three tephra layers cored in the Pozzuoli Bay indicates 5 to 25 m of post-Roman differential subsidence and tilting towards ESE of the inner caldera resurgence, as recorded by the drowning of the infralittoral prograding wedge below the present-day storm wave base.

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Section: Ground Deformation In the Pozzuoli Areamentioning

confidence: 99%

The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15ky

et al. 2014

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“…Thus, the installed temperature measurement system represents an important step in the monitoring of this high-risk volcanic area, since temperature changes are among the most robust precursors of gas and magma migration towards the surface, possibly forecasting impending eruptions. Furthermore, the caldera of Campi Flegrei is characterized by a deformation pattern, with transient behavior, that can be explained by the overlapping of short time pulses, that are caused by injection of magmatic fluids into the hydrothermal system and a longer time process of heating the rock [9][10][11][12][13][14][15]. Thus, the thermal monitoring system here presented can be used to better understand the driving processes related to transient phenomena and to mitigate potential hazards.…”

Section: Discussionmentioning

confidence: 99%

Distributed-Temperature-Sensing Using Optical Methods: A First Application in the Offshore Area of Campi Flegrei Caldera (Southern Italy) for Volcano Monitoring

Carlino

Mirabile²,

Troise

et al. 2016

Remote Sensing

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Abstract:A temperature profile 2400 m along the off-shore active caldera of Campi Flegrei (Gulf of Pozzuoli) was obtained by the installation of a permanent fiber-optic monitoring system within the framework of the Innovative Monitoring for Coastal and Marine Environment (MON.I.C.A) project. The system consists of a submerged, reinforced, multi-fiber cable containing six single-mode telecom grade optical fibers that, exploiting the stimulated Brillouin scattering, provide distributed temperature sensing (DTS) with 1 m of spatial resolution. The obtained data show that the offshore caldera, at least along the monitored profile, has many points of heat discharge associated with fluid emission. A loose association between the temperature profile and the main structural features of the offshore caldera was also evidenced by comparing DTS data with a high-resolution reflection seismic survey. This represents an important advancement in the monitoring of this high-risk volcanic area, since temperature variations are among the precursors of magma migration towards the surface and are also crucial data in the study of caldera dynamics. The adopted system can also be applied to many other calderas which are often partially or largely submerged and hence difficult to monitor.

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“…Since November 2004, a new uplift phase started with about 0.04 m of uplift by the end of October 2006 (Del Gaudio et al, 2010;Troise et al, 2007). The magmatic system is still active as attested by diffuse degassing zones and hydrothermal vents (fumaroles) in the areas of Solfatara crater and Pisciarelli.…”

Section: Geological Backgroundmentioning

confidence: 99%

High-resolution morpho-bathymetry of Pozzuoli Bay, southern Italy

et al. 2015

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We present the results of a detailed bathymetric survey of Pozzuoli Bay (Gulf of Naples, Italy). This shallow marine area, along with the Campi Flegrei inland, is a highly active volcanic district in the coastal zone of SW Italy. The area has been active since at least 78 ka B.P., and is structurally dominated by a caldera collapse ( 8 km in diameter) associated with the eruption of the Neapolitan Yellow Tuff (NYT), a 30 -50 km 3 dense rock equivalent (DRE) ignimbrite dated 15 ka B.P. The main cartographic product consists of a 1:10,000 scale morpho-bathymetric map of Pozzuoli Bay, derived from 1 m cell-size, colour hill-shaded, digital terrain model of the seafloor. Multibeam bathymetry data reveal the precise extent of Roman underwater archaeological remains located in the N -NW infralittoral zone of the Bay. Morphometric analysis allowed for the development of thematic representations, including slope and aspect maps. A complete data set of active fluid vents seafloor locations were also recorded during the survey and reported in the final map. The multibeam bathymetric survey illustrated in this study provides an unprecedentedly detailed image of the seafloor morphology of Pozzuoli Bay and represents a contribution to the understanding of the dynamic evolution of the Campi Flegrei caldera, a high-risk volcanic area densely populated by almost one million people.

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Renewed ground uplift at Campi Flegrei caldera (Italy): New insight on magmatic processes and forecast

Cited by 99 publications

References 25 publications

The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15ky

The Neapolitan Yellow Tuff caldera offshore the Campi Flegrei: Stratal architecture and kinematic reconstruction during the last 15ky

Distributed-Temperature-Sensing Using Optical Methods: A First Application in the Offshore Area of Campi Flegrei Caldera (Southern Italy) for Volcano Monitoring

High-resolution morpho-bathymetry of Pozzuoli Bay, southern Italy

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