FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2027705750> ?p ?o ?g. }

• W2027705750 endingPage "193" @default.
• W2027705750 startingPage "181" @default.
• W2027705750 abstract "A model of caldera resurgence was applied to the Island of Ischia to explain uplift, volcanic activity and tectonics on Mount Epomeo, as well as historical seismicity and slow ground movements recorded for the past 2000 years. A two-dimensional mechanical model was utilized for the crust, which was considered to be an elastic plate overlying a laccolith. Geometric dimensions and mechanical parameters were constrained using geological, geophysical and geochemical data. We propose that a laccolith, with a diameter L of c. 10 km, and a depth of up to 1 km in the centre of the island, triggered the caldera resurgence after the Mount Epomeo Green Tuff eruption forming the caldera (55 000 a BP). A bending phase and a punched laccolith phase are thought to have caused the observed deformations in the caldera. These processes control the tectonics at the boundary of the Mount Epomeo resurgent structure, volcanic activity and dynamics of the island. process starting between 33 000 and 28 000 years ago, forming the Mount Epomeo block. Total uplift, deduced from the present height of marine deposits and eustatic variations, is 710 m on the southern flank and 920–970 m on the northern flank, with an average uplift rate of 2.3 and 3 cm a−1 respectively (Barra et al. 1992; Tibaldi & Vezzoli 2004). This resurgence of the central part of the island is thought to be associated with the input of new magma at shallow depths, which from 28 000 to 18 000 a BP produced volcanic deposits of significantly different composition from those of previous eruptions (Civetta et al. 1991; Petrini et al. 2001). The resurgent block of Mount Epomeo, dominating the central sector of the island, is roughly square, with sides about 4 km long. The edges of the block are marked by a system of faults with NW–SE, NE–SW and N–S strikes (Fig. 2). The faults on the northern side of Mount Epomeo have been active over the last 800 years as seismogenetic sources, as testified by historical data. Furthermore, the horseshoeshaped structure of Mount Epomeo, open towards the southeast, and the large hummocky deposits off the south coast of Ischia, recently recognized by marine surveys, are consistent with an avalanche involving the summit of the Mount Epomeo resurgent block and the southern onshore caldera flank (Luongo et al. 1995; Cubellis & Luongo 1998; Marsella et al. 2001; The island of Ischia is a 46 km2 volcanic field emerging at the western edge of the Bay of Naples (Fig. 1). This field represents the emergent part of a more extensive volcanic area developed mainly to the west of the island (Vezzoli 1988; Bruno et al. 2002). It consists of volcanic rocks deriving from a number of eruptive centres which have been largely destroyed or covered by subsequent activity and can now be identified only in part. The oldest outcrops date back to about 150 000 a BP, while the most recent eruption occurred in 1301–1302 AD in the eastern sector of the island (Vezzoli 1988; Civetta et al. 1991). During this period, five phases of activity have been distinguished and grouped in an older cycle and a younger cycle, whose transition is defined by the great alkali-trachytic ignimbrite eruption of the Mount Epomeo Green Tuff (MEGT) (55 000 a BP) which was accompanied by a caldera collapse (Table 1). Although the boundaries of the caldera are ill-defined, it has an approximately elliptical shape 10x7 km2 (Fig. 2), with the longer axis trending east–west (Tibaldi & Vezzoli 1998). The caldera depression was filled – at first in sub-aerial and subsequently in submarine conditions – by the MEGT, the tuffs of the Citara Formation (CF) (about 44 000–33 000 a BP) and subaqueous epiclastic and pyroclastic deposits, Colle Jetto Formation (CJF). These deposits were involved in an uplift 182 S. CARLINO ET AL. Fig. 1. Digital terrain model (DTM) image of the Bay of Naples. Ischia Island is located in the western sector. Table 1. Volcanic activity phases of Ischia Older cycle Phase 1>150 000 a BP Older major pyroclastic activity Pre-Mount Epomeo Green Tuff activity Phase 2 50 000–75 000 a BP Lava dome emplacement Phase 3 55 000–33 000 a BP Younger major pyroclastic activity Younger cycle Mount Epomeo Green Tuff Phase 4 29 000–18 000 a BP Explosive and effusive activity in the Citara Formation southwestern and southestern sector Phase 5 10 000 a BP to 1302 AD Prehistoric and historical activity Chiocci et al. 2002; Cubellis et al. 2004; De Alteriis et al. 2004; Tibaldi & Vezzoli 2004; Carlino & Cubellis 2005). In general, the models used to interpret resurgence processes for large calderas – the thrust of the magma in a shallow source due to an increase in pressure or due to vesiculation; regional detumescence; or heat transfer from the magmatic basin to the surface aquifer system (Smith & Bailey 1968; Marsh 1984; Luongo et al. 1991; De Natale et al. 2001) – appear inadequate to explain resurgence in calderas of modest size, as in the case of the island of Ischia. The complexity of the problem also emerges from analysis of the models proposed since the early twentieth century. Indeed, Rittmann (1930) proposed volcano-tectonic horst mechanism, i.e. uplift by the intrusion of a shallow laccolith, to explain the structure of Mount Epomeo. More recently, Fusi et al. (1990) and Tibaldi & Vezzoli (1998) proposed that the resurgent process of Ischia was produced by volumetric variations in the subsurface magma body. Orsi et al. (1991) suggest a simple-shear stress for the resurgence, in which the source mechanism is an increase in magmatic pressure in the upper part of a shallow magma chamber. Luongo et al. (1995) and Cubellis & Luongo (1998) used a punched laccolith mechanism to model the uplift of Mount Epomeo. Acocella et al. (1997, 1999) and Molin et al. (2003), according to similar experimental models, proposed that the resurgent doming of Mount Epomeo is due to a trapdoor uplift mechanism, with a hinge in the southeastern part of the island. To remove the arbitrariness of the above solutions for the resurgence of Ischia we impose 183 CALDERA RESURGENCE OF ISCHIA ISLAND geological boundary conditions within the solution to the problem of the ground deformation. General and specific boundary conditions are deduced by high-quality field-mapping data and geochemical and geophysical surveys of the island. The bending model for Mount Epomeo" @default.
• W2027705750 created "2016-06-24" @default.
• W2027705750 creator A5037253560 @default.
• W2027705750 creator A5037755716 @default.
• W2027705750 creator A5078855517 @default.
• W2027705750 creator A5080279357 @default.
• W2027705750 date "2006-01-01" @default.
• W2027705750 modified "2023-09-30" @default.
• W2027705750 title "On the mechanics of caldera resurgence of Ischia Island (southern Italy)" @default.
• W2027705750 cites W1485921491 @default.
• W2027705750 cites W1630852356 @default.
• W2027705750 cites W1972430985 @default.
• W2027705750 cites W1975070272 @default.
• W2027705750 cites W1988299808 @default.
• W2027705750 cites W2005563146 @default.
• W2027705750 cites W2005856528 @default.
• W2027705750 cites W2009472753 @default.
• W2027705750 cites W2015580882 @default.
• W2027705750 cites W2021255039 @default.
• W2027705750 cites W2023474267 @default.
• W2027705750 cites W2037179346 @default.
• W2027705750 cites W2039869957 @default.
• W2027705750 cites W2043708452 @default.
• W2027705750 cites W2045323687 @default.
• W2027705750 cites W2050341136 @default.
• W2027705750 cites W2067751327 @default.
• W2027705750 cites W2070059195 @default.
• W2027705750 cites W2074258114 @default.
• W2027705750 cites W2083957989 @default.
• W2027705750 cites W2084402833 @default.
• W2027705750 cites W2093306512 @default.
• W2027705750 cites W2109111900 @default.
• W2027705750 cites W2109291306 @default.
• W2027705750 cites W2117197878 @default.
• W2027705750 cites W2137532673 @default.
• W2027705750 cites W2152154588 @default.
• W2027705750 cites W2164650603 @default.
• W2027705750 cites W2887628283 @default.
• W2027705750 cites W4234066087 @default.
• W2027705750 cites W73857712 @default.
• W2027705750 doi "https://doi.org/10.1144/gsl.sp.2006.269.01.12" @default.
• W2027705750 hasPublicationYear "2006" @default.
• W2027705750 type Work @default.
• W2027705750 sameAs 2027705750 @default.
• W2027705750 citedByCount "25" @default.
• W2027705750 countsByYear W20277057502012 @default.
• W2027705750 countsByYear W20277057502013 @default.
• W2027705750 countsByYear W20277057502016 @default.
• W2027705750 countsByYear W20277057502017 @default.
• W2027705750 countsByYear W20277057502018 @default.
• W2027705750 countsByYear W20277057502020 @default.
• W2027705750 countsByYear W20277057502021 @default.
• W2027705750 countsByYear W20277057502022 @default.
• W2027705750 countsByYear W20277057502023 @default.
• W2027705750 crossrefType "journal-article" @default.
• W2027705750 hasAuthorship W2027705750A5037253560 @default.
• W2027705750 hasAuthorship W2027705750A5037755716 @default.
• W2027705750 hasAuthorship W2027705750A5078855517 @default.
• W2027705750 hasAuthorship W2027705750A5080279357 @default.
• W2027705750 hasConcept C120806208 @default.
• W2027705750 hasConcept C127313418 @default.
• W2027705750 hasConcept C165205528 @default.
• W2027705750 hasConcept C205649164 @default.
• W2027705750 hasConcept C49708893 @default.
• W2027705750 hasConceptScore W2027705750C120806208 @default.
• W2027705750 hasConceptScore W2027705750C127313418 @default.
• W2027705750 hasConceptScore W2027705750C165205528 @default.
• W2027705750 hasConceptScore W2027705750C205649164 @default.
• W2027705750 hasConceptScore W2027705750C49708893 @default.
• W2027705750 hasIssue "1" @default.
• W2027705750 hasLocation W20277057501 @default.
• W2027705750 hasOpenAccess W2027705750 @default.
• W2027705750 hasPrimaryLocation W20277057501 @default.
• W2027705750 hasRelatedWork W1773794422 @default.
• W2027705750 hasRelatedWork W1965128824 @default.
• W2027705750 hasRelatedWork W1977081541 @default.
• W2027705750 hasRelatedWork W1987084978 @default.
• W2027705750 hasRelatedWork W2005047507 @default.
• W2027705750 hasRelatedWork W2029645584 @default.
• W2027705750 hasRelatedWork W2358598569 @default.
• W2027705750 hasRelatedWork W2787484947 @default.
• W2027705750 hasRelatedWork W2956210099 @default.
• W2027705750 hasRelatedWork W3125229786 @default.
• W2027705750 hasVolume "269" @default.
• W2027705750 isParatext "false" @default.
• W2027705750 isRetracted "false" @default.
• W2027705750 magId "2027705750" @default.
• W2027705750 workType "article" @default.