Magmatic evolution of the Campi Flegrei and Procida volcanic fields, Italy, based on interpretation of data from well-constrained melt inclusions

Esposito, Rosario; Badescu, Kimberly; Steele‐MacInnis, Matthew; Cannatelli, Claudia; Vivo, Benedetto De; Lima, Annamaria; Bodnar, Robert J.; Manning, Craig E.

doi:10.1016/j.earscirev.2018.06.003

Cited by 18 publications

(5 citation statements)

References 127 publications

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“…While field observations and whole-rock geochemical compositions have been widely utilized in the study of plutons, the "averaged" nature of these analyses at best restricts the ability to distinguish individual physical bodies and characterize detailed chemical processes that define arc magmas (e.g., mixing, recycling of mushes, fractional crystallization). Accessory minerals, such as zircon, and melt inclusions from volcanic and plutonic rocks have long been interpreted to indicate mixing and recycling of magmas based on patterns of age distribution and zircon composition (e.g., Bachmann and Bergantz, 2006;Matzel et al, 2006;Miller et al, 2007;Memeti et al, 2010;Siégel et al, 2018;Ratschbacher et al, 2018;Esposito et al, 2018). In other studies, distinct populations of minerals were identified based on textural and geochemical evidence and used to identify distinct magma pulses and possible mixing between pulses (Ginibre et al, 2002;Davidson et al, 2007;Zhang et al, 2015;Barnes et al, 2016b).…”

Section: ■ Introductionmentioning

confidence: 99%

Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA

et al. 2021

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Incremental pluton growth can produce sheeted complexes with no magma-magma interaction or large, dynamic magma bodies communicating via crystal and melt exchanges, depending on pulse size and frequency of intrusions. Determining the degree and spatial extent of crystal-melt exchange along and away from plutonic contacts at or near the emplacement level, such as in the large, long-lived Tuolumne intrusive complex (TIC) in California, sheds light onto the process and evolution of incremental growth. This study used field mapping and petrographic and geochemical analysis of plagioclase and K-feldspar populations in the equigranular Half Dome (eHD), porphyritic Half Dome (pHD), and Cathedral Peak (CP) Granodiorites of the southeastern section of the TIC to determine the presence and/or extent of feldspar recycling at interunit contacts. Our results suggest that contacts between major units are predominantly ~400-m- to 3-km-thick gradational zones. K-feldspar is compositionally distinct in eHD and neighboring gradational zones and shows no evidence of mixing. K-feldspar in a gradational zone between pHD and CP shows evidence of mixing between the two. Plagioclase in eHD and CP display distinct ranges of anorthite content, Sr, and light rare earth element abundances; both populations are observed in pHD. Major oxide and trace element calculations of melts in equilibrium with plagioclase cores indicate that the melts were more silicic, less calcic, and lower in Sr and Rb than corresponding analyzed whole-rock samples. These results suggest that the magmas also underwent plagioclase and biotite accumulation. The presence of two plagioclase populations in pHD is consistent with eHD and CP hybridizing to form pHD in an increasingly maturing and exchanging TIC magmatic system during the eHD-pHD-CP stages but before groundmass and small K-feldspar phenocrysts crystallized.

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Section: ■ Introductionmentioning

confidence: 99%

Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA

et al. 2021

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“…(1994); Esposito et al. (2018). Uncertainties in SiO 2 are taken as 1%, the typical maximum uncertainty of XRF analysis (Rousseau, 2001).…”

Section: Methodsmentioning

confidence: 99%

“…Volcanic ash is most commonly basaltic (Walker, 1993), and our basaltic samples are large enough to be further sieved for measurements. In particular, samples from Mount Aso (VA1), Eyjafjallajökull (VA7), and Francalanci et al (1995); Larsen et al (2013Larsen et al ( , 2010; Eichelberger et al (1995); Nye et al (1994); Esposito et al (2018). Uncertainties in SiO 2 are taken as 1%, the typical maximum uncertainty of XRF analysis (Rousseau, 2001).…”

Section: Ash Density Measurementsmentioning

confidence: 99%

Characterizing Volcanic Ash Density and Its Implications on Settling Dynamics

Lau,

Grainger,

Taylor

2024

JGR Atmospheres

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Volcanic ash clouds are carefully monitored as they present a significant hazard to humans and aircraft. The primary tool for forecasting the transport of ash from a volcano is dispersion modeling. These models make a number of assumptions about the size, sphericity and density of the ash particles. Few studies have measured the density of ash particles or explored the impact that the assumption of ash density might have on the settling dynamics of ash particles. In this paper, the raw apparent density of 23 samples taken from 15 volcanoes are measured with gas pycnometry, and a negative linear relationship is found between the density and the silica content. For the basaltic ash samples, densities were measured for different particle sizes, showing that the density is approximately constant for particles smaller than 100 μm, beyond which it decreases with size. While this supports the current dispersion model used by the London Volcanic Ash Advisory Centre (VAAC), where the density is held at a constant (2.3 g cm−3), inputting the measured densities into a numerical simulation of settling velocity reveals a primary effect from the silica content changing this constant. The VAAC density overestimates ash removal times by up to 18%. These density variations, including those varying with size beyond 100 μm, also impact short‐range particle‐size distribution measurements and satellite retrievals of ash.

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“…1b) and includes five monogenetic volcanoes. The erupted magmas of intermediate composition indicate that shallow 9 crustal magma chamber conditions were not established (De Astis et al, 2004;Mormone et al, 2011;Esposito et al, 2018). The last eruption formed the Solchiaro tuff ring (23,624 ± 330 cal.…”

Section: Geological Context and Volcanological Backgroundmentioning

confidence: 99%

The space-time architecture variation of the shallow magmatic plumbing systems feeding the Campi Flegrei and Ischia volcanoes (Southern Italy) from halogen constraints

Balcone-Boissard,

Boudon,

Zdanowicz

et al. 2024

American Mineralogist

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For active volcanoes, knowledge of the architecture of the plumbing system and the conditions of magma storage prior to an eruption are highly important, given their influence on the eruptive style and, thus, the management of future volcanic crises. Here, chlorine is used as a geobarometer for potassic alkaline magmas at the Campi Flegrei volcanic complex, revealing the shallowest depth of fluid-melt equilibration with respect to Cl. The results for representative fallout deposits of selected explosive eruptions show the existence of a multi-depth equilibration zone through time, including shallow magma storage. We describe evidence for the shallowest zone located at a depth equivalent to 65 MPa for the Agnano Monte Spina eruption (4482–4625 cal. yrs BP), at ~100 MPa for the Pomici Principali (11 915–12 158 cal. yrs BP), and the Astroni 6 (4098–4297 cal. yrs BP) eruptions, and close to 115 MPa for the last explosive eruption of Monte Nuovo (AD 1538). For comparison, the pressure estimated for a possible reservoir feeding the Cretaio eruption of Ischia island (AD 430), the only studied eruption on Ischia, is ~140 MPa. The pressure estimates for the two largest magnitude eruptions, the Campanian Ignimbrite (40 ka) and the Neapolitan Yellow Tuff (14.9 ka), are also discussed with respect to available magma withdrawal models. The pressures estimated using the Cl geobarometer for the magma leading to the fallout phases of these two eruptions provide evidence for a low-volume, shallow domain (~40 MPa) for the Plinian phase of the Campanian Ignimbrite eruption and a main, deeper reservoir (~130–165 MPa) for the Neapolitan Yellow Tuff eruption. The inferred shallowest equilibration pressures are interpreted here as corresponding to transitory, short-lived magma apophyses, whose eruption may have been facilitated by optimum tectonic stresses, rheological behavior of the crust, and efficiency of volatile exsolution. Alternatively, these magma apophyses may represent an evolved, crystal-rich ponded magma into which a volatile-rich magma ascending from depth was injected. The transient nature of such very shallow reservoirs is suggested by the short timescales inferred from diffusion modeling on crystals available in the literature for the studied Campi Flegrei eruptions. The influence of sulfur (S) on Cl solubility is assessed through Cl solubility modeling and applied to different eruptions. In addition, the pressure at which magmatic fluids and melts equilibrated with respect to Cl is shallower for the Campi Flegrei volcanic complex than the Somma-Vesuvio volcanic complex, erupting more homogeneous differentiated magma, of trachytic or phonolitic composition. This approach of using Cl to investigate the architecture of the plumbing system can be extended to all alkali-rich magma systems.

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Magmatic evolution of the Campi Flegrei and Procida volcanic fields, Italy, based on interpretation of data from well-constrained melt inclusions

Cited by 18 publications

References 127 publications

Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA

Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA

Characterizing Volcanic Ash Density and Its Implications on Settling Dynamics

The space-time architecture variation of the shallow magmatic plumbing systems feeding the Campi Flegrei and Ischia volcanoes (Southern Italy) from halogen constraints

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