Relationships of geothermal conditions to structural and hydrogeological features in the Roccamonfina region (Northern Campania, Italy)

Barbier, Enrico; Burgassi, P.D.; Calamai, A.; Cataldi, R.; Cerón, Patricia

doi:10.1016/0375-6505(70)90061-1

Cited by 4 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1; cf. Barbier et al 1970). Furthermore, the persistence of a lake in the summit depression at this stage of the eruption is extremely unlikely, given that approximately 1-2 km 3 of magma had been erupted without significant interruptions.…”

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 96%

“…However, stratovolcanoes provide a limited recharge area to shallow aquifers, which are then characterized by low to moderate productivity. Also, water-flow paths are generally oriented away from the summit region (e.g., Barbier et al 1970;Boni et al 1981Boni et al , 1995. By contrast, regional aquifers in volcanic areas are generally located well beneath volcanic edifices.…”

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 99%

“…The absence of hydrothermally altered lavas also indicates that there were no substantial aquifers within the volcano during its activity (cf. Barbier et al 1970). This conclusion is supported by the modern hydrogeology of the region (Barbier et al 1970;Giordano et al 1995).…”

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 99%

“…Barbier et al 1970). This conclusion is supported by the modern hydrogeology of the region (Barbier et al 1970;Giordano et al 1995). A substantial aquifer is one that is capable of supplying water at a rate comparable to the MER involved with sub-Plinian to Plinian-type eruptions (i.e., for MER 1 10 6 kg/s, water supply rates 1 10 5 Lt/s; cf.…”

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 99%

See 3 more Smart Citations

Facies characteristics and magma-water interaction of the White Trachytic Tuffs (Roccamonfina Volcano, southern Italy)

Giordano

1998

Bulletin of Volcanology

View full text Add to dashboard Cite

The Quaternary White Trachytic Tuffs Formation from Roccamonfina Volcano (southern Italy) comprises four non-welded, trachytic, pyroclastic sequences bounded by paleosols, each of which corresponds to small-to intermediate-volume explosive eruptions from central vents. From oldest to youngest they are: White Trachytic Tuff (WTT) Cupa, WTT Aulpi, WTT S. Clemente, and WTT Galluccio. The WTT Galluccio eruption was the largest and emplaced F 4 km 3 of magma. The internal stratigraphy of all four WTT eruptive units is a complex association of fallout, surge, and pyroclastic flow deposits. Each eruptive unit is organized into two facies associations, Facies Association A below Facies Association B. The emplacement of the two facies associations may have been separated by short time breaks allowing for limited reworking and erosion. Facies Association A consists of interbedded fallout deposits, surge deposits, and subordinate ignimbrites. This facies association involved the eruption of the most evolved trachytic magma, and pumice clasts are white and well vesiculated. The grain size coarsens upward in Facies Association A, with upward increases of dune bedform wavelengths and a decrease in the proportion of fine ash. These trends could reflect an increase in eruption column height from the onset of the eruption and possibly also in mass eruption rate. Facies Association B comprises massive ignimbrites that are progressively richer in lithic clast content. This association involved the eruption of more mafic magma, and pumice clasts are gray and poorly vesiculated. Facies Association B is interpreted to record the climax of the eruption. Phreatomagmatic deposits occur at different stratigraphic levels in the four WTT and have different facies characteristics. The de-posits reflect the style and degree of magma-water interaction and the local hydrogeology. Very finegrained, lithic-poor phreatomagmatic surge deposits found at the base of WTT Cupa and WTT Galluccio could record the interaction of the erupting magma with a lake that occupied the Roccamonfina summit depression. Renewed magma-water interaction later in the WTT Galluccio eruption is indicated by fine grained, lithic-bearing phreatomagmatic fall and surge deposits occurring at the top of Facies Association A. They could be interpreted to reflect shifts of the magma fragmentation level to highly transmissive, regional aquifers located beneath the Roccamonfina edifice, possibly heralding a caldera collapse event.

show abstract

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 96%

Section: Influence Of Aquifers On Magma-water Interactionmentioning

confidence: 99%