Research Article| September 01, 2015 Stratigraphy, structure, and volcano-tectonic evolution of Solfatara maar-diatreme (Campi Flegrei, Italy) Roberto Isaia; Isaia † 1Istituto Nazionale di Geofisica e Vulcanologia, Sezione Napoli Osservatorio Vesuviano, Via Diocleziano 328, 80124 Napoli, Italy †roberto.isaia@ingv.it Search for other works by this author on: GSW Google Scholar Stefano Vitale; Vitale 2Dipartimento Scienze della Terra, dell'Ambiente delle Risorse (DiSTAR), Università Federico...

Abstract Phreatic and hydrothermal eruptions are small energetic explosive events that generally have few to no precursors represent a considerable hazard in tourist urban areas. At the Campi Flegrei caldera, these occurred at Solfatara volcano likely nearby Pisciarelli site, where most powerful phenomena located. Here, increased activity has caused relevant morphological changes led local authorities deny access site. Stratigraphic, structural, geophysical investigations allowed us...

This study provides new structural, stratigraphic, and geochemical data a literature review of the Cretaceous–Paleogene stratigraphy, biostratigraphy, tectonics, magmatism in southern Apennines belt, Italy, with aim to demonstrate occurrence an Albian Eocene abortive rifting stage Adria domain. During this time, tectono‐stratigraphic evolution domain is characterized by episodes coeval uplift drowning. Different sectors Apennine Apulian platforms were so changes paleoenvironments, leading...

Abstract This study presents a new method, called the Radial Interpolation Method, to interpolate data characterized by an approximately radial pattern around relatively constrained central zone, such as ground deformation patterns shown in many active volcanic areas. The method enables fast production of short-term maps on base spatially sparse measurements and can provide uncertainty quantification interpolated values, fundamental for hazard assessment purposes source reconstruction....

Abstract The central sector of the Campi Flegrei volcano, including Solfatara maar and Pisciarelli fumarole field, is currently most active area caldera as regards seismicity gaseous emissions it plays a significant role in ongoing unrest. However, general volcano-tectonic reconstruction entire still missing. This work aims to depict, for first time, architecture through application deep Electrical Resistivity Tomography. We reconstructed three-dimensional resistivity model sector. Results...

Abstract We report, for the first time, evidence of seismically induced soft‐sediment deformations in central area active Campi Flegrei caldera (southern Italy). analyzed marine‐transitional and continental sequences located along coastal La Starza cliffs several stratigraphic logs exposed during excavation a 1‐km‐long tunnel Pozzuoli area. The successions host structures including sand dikes volcanoes, which are largely dated within 4.55‐ to 4.28‐kyr BP interval. volcano‐sedimentary...

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 Campania region (southern Italy). Here, bound N-NE side of carbonate ridges that form regional mountain backbone. In several outcrops, Mesozoic carbonates superposed onto unconformable wedge-top basin deposits upper Miocene Castelvetere Group, providing constraints to age activity this thrusting event. Moreover, 4-km-long...

Abstract The Neotethyan oceanic Diamante‐Terranova unit (DIATU; southern Apennines–Calabria–Peloritani Terrane system) includes basic rocks that during the Cenozoic were subducted and metamorphosed to lawsonite‐blueschist facies conditions. Petrological structural observations (both at meso‐ micro‐scale) show lawsonite growth was continuous three distinctive ductile deformation stages (D1–D3). These likely occurred close metamorphic peak, estimated 350–390°C 0.9–1.1 GPa, producing an...

Abstract The Roccamonfina volcano is located within the Garigliano Graben (southern Apennines, Italy) and has been active throughout Middle‐Late Pleistocene. Along its polyphase volcanic history (630–55 ka), including several caldera‐forming eruptions (385–230 effusive/mildly explosive monogenetic events occurred along slopes, summit caldera, graben‐bounding carbonate reliefs. In this paper, we present a multidisciplinary study of mafic magmatic feeder dike intruded Meso‐Tertiary carbonates...

Pisciarelli, together with the adjacent Solfatara maar-diatreme, represents most active structure of Campi Flegrei caldera (Italy) in terms degassing and seismic activity. This paper aims to define Pisciarelli hydrothermal system (down a 20 m depth) through electrical resistivity time-domain-induced polarization tomography self-potential mapping. The retrieved 3D image area helps reconstruct subsurface its maximum degassing, containing main fumarole ("soffione") mud pool. In particular,...

We present in this paper the results of a geophysical and geochemical survey self potential, diffuse soil CO2 flux, temperature gas permeability carried out Fondi di Baia craters on western sector Campi Flegrei caldera, one most hazardous active volcano Italy, aiming at highlighting small scale volcano-tectonic structures Holocene edifice evaluating its state fracturing. The central (Solfatara volcano-Pisciarelli) is affected by ground deformation intense high-temperature fumarolic activity,...

We report the occurrence of several sand liquefaction structures, such as dikes, in stratigraphic record Campi Flegrei volcano, located both inside and outside caldera. Five sites were analyzed within caldera two outside. The grain size analysis fillings indicates that these deposits are very fine-to-coarse sands generally poorly sorted. All granulometry curves fall field liquefiable, loose sediments. Frequently, dikes characterized by fillings: a rim showing sorted finer core with extremely...

In this study, discrete fracture network (DFN) modelling was performed for Triassic–Jurassic analogue reservoir units of the NW Lurestan region, Iran. The elaborated following a multi-scale statistical sampling systems characterising analysed succession. approach at two different observation scales. At macro-scale, digital outcrop analysis carried out by means line-drawing based on camera-acquired images, focussing distribution major throughgoing fractures; meso-scale, scan line method...

Abstract We report the first evidence of fault rocks (FRs) developed during high-pressure/low-temperature (HP/LT) subduction-related metamorphism, within quartz+epidote pods embedded in glaucophane–lawsonite-bearing ophiolitic metabasalts Diamante–Terranova unit (Calabria, Italy). FRs occur as relic injections appearing thin dark seams, locally showing an internal foliation characterized by tabular, curvilinear and meander-like shapes, consist very fine grains glaucophane titanite, including...

We present a structural study on the tectonic windows of Giffoni and Campagna, located in western sector southern Apennines (Italy). analyzed thrusts, folds, related minor deformation structures. Here, major in-sequence E-verging thrust fault juxtaposes Meso-Cenozoic successions Apennine Platform (Picentini Mts unit) Lagonegro-Molise Basin (Frigento unit). However, out-of-sequence thrusts duplicated pile with interposition upper Miocene wedge-top basin deposits Castelvetere Group....