Valley pond and ignimbrite veneer deposits in the small-volume phreatomagmatic ‘Peperino Albano’ basic ignimbrite, Lago Albano maar, Colli Albani volcano, Italy: influence of topography

Giordano, Guido; Rita, Donatella De; Fernand, Raymond Alexander; Rodani, S.

doi:10.1016/s0377-0273(02)00253-6

Cited by 66 publications

(36 citation statements)

References 22 publications

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“…2a). Although the PA ignimbrite has recently been interpreted as a phreatomagmatic low-temperature ignimbrite (Giordano et al 2002), in the past it had been also interpreted as a lahar deposit (De Rita et al 1988). Age determinations obtained with different methods vary between 36 and 19 ka (Fornaseri and Cortesi 1989;Mercier 1993;Marra et al 2003;Soligo et al 2003).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The phreatomagmatic origin of this deposit has been inferred from the extreme fragmentation of the juvenile component, which is more than 95% ash-sized, even at proximal locations. Ash shards observed under a Scanning Electron Microscope exhibit blocky shapes and hydration fractures (Giordano et al 2002). The PA deposits are distributed all around the volcano, rapidly thinning to an average distance of 2-3 km from the crater rim, although a lobe of the ignimbrite is present as far as 9 km away from the crater rim, along the deeply incised, NW-trending ravine locally known as Valle delle Petrare (Fig.…”

Section: Summary Of the Sedimentological Facies And Ams Of The Peperimentioning

confidence: 99%

“…The emplacement temperature and magnetization properties of the phreatomagmatic Peperino Albano (PA) ignimbrite (Giordano et al 2002 and references therein) from the Colli Albani volcano (Italy), have been investigated since as far back as the late nineteenth century (e.g. Meli 1892; Folgheraiter 1894).…”

Section: Introductionmentioning

confidence: 99%

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Paleomagnetic evidence for low-temperature emplacement of the phreatomagmatic Peperino Albano ignimbrite (Colli Albani volcano, Central Italy)

et al. 2007

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The Peperino Albano (approximately 19-36 ka old) is a phreatomagmatic pyroclastic flow deposit, cropping out along the slopes of the associated Albano maar (Colli Albani volcano, Italy). The deposit exhibits lateral and vertical transitions from valley pond to veneer facies, as well as intracrater facies. We present the results of a paleomagnetic study of thermal remanent magnetization (TRM) of the lithic clasts of the Peperino Albano ignimbrite that provide quantitative estimates of the range of emplacement temperatures across the different facies of the ignimbrite. Emplacement temperatures estimated for the Peperino Albano ignimbrite range between 240°and 350°C, with the temperatures defined in the intracrater facies being generally lower than in the valley pond and veneer facies. This is possibly due to the large size of the sampled clasts in the intracrater facies which, when coupled with low temperature at the vent, were not completely heated throughout their volume during emplacement. The emplacement temperatures derived from the paleomagnetic results are in good agreement with the presence of un-burnt plants at the base of the ignimbrite, indicating that the temperature of the pyroclastic flow was lower than the temperature of ignition of wood. Paleomagnetic results from the Peperino Albano confirm the reliability of the paleomagnetic approach in defining the thermal history of pyroclastic flow deposits.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Summary Of the Sedimentological Facies And Ams Of The Peperimentioning

confidence: 99%

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Paleomagnetic evidence for low-temperature emplacement of the phreatomagmatic Peperino Albano ignimbrite (Colli Albani volcano, Central Italy)

et al. 2007

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“…with deposits typically alternating massive and stratified ash layers, with almost ubiquitous abundance of sedimentary (carbonates, shales), metamorphic (marbles), metasomatic (skarn) and intrusive xenoliths (De Benedetti et al, 2010), which give the typical macroscopic "salt and pepper" aspect from which these rocks, largely utilised as building stones since Roman age, obtained their local name: "peperino". During the Holocene, Albano lake has been the site of dramatic oscillations of lake level and overflows up to Roman times Giordano et al, 2002;De Benedetti et al, 2008). Romans dug a tunnel-outflow for the lake in 398 BC after a dramatic overflow, to regulate the lake level 70 m below the lowest threshold of the crater rim.…”

Section: The Vesuvius and The Other Volcanoes Of Central Italymentioning

confidence: 99%

The Vesuvius and the other volcanoes of Central Italy

Avanzinelli¹,

Cioni²,

Conticelli³

et al. 2017

GFT

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“…Their study has been used to reconstruct the stratigraphy under the volcanic area using the most varied methods. Referring only to the most recent ones, we point out here with those by Karner et al (2001), Funiciello et al (2003), Giordano et al (2002Giordano et al ( , 2006, Marra et al (2003), Soligo et al (2003), Brigatti et al (2005), Freda et al (2006), Gaeta et al (2006), De Benedetti et al (2008, 2010, and Laurora et al (2009). Of particular interest to the present investigation are the studies on the sedimentary carbonate substrate of the volcano, as sampled by the eruption, because carbonate rocks (both lime-and dolostones) represent the bulk material that by reacting gave rise to the fibrous mineralizations.…”

Section: Geology Of the Sampled Area And Occurrence Of The Studied Spmentioning

confidence: 99%

Asbestiform tremolite within the Holocene late pyroclastic deposits of Colli Albani volcano (Latium, Italy): occurrence and crystal chemistry

Ventura

Caprilli

Bellatreccia

et al. 2014

Rend. Fis. Acc. Lincei

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This work relates the occurrence and the characterization of fibrous tremolite within the latest pyroclastic deposits of the Colli Albani (Alban Hills) volcano, to the south-east of Rome (Italy). These mineralizations were observed during a systematic rock-sampling undertaken to complete the geological survey for the new 1:50 000 map of this volcanic area. The examined specimens were collected inside distal deposits correlated to the last Albano Maar activity, which are geographically located within the boundaries of the Nemi community. Tremolite occurs within both carbonate ejecta and G. Della Ventura (☺) Dipartimento di Scienze, Università di Roma Tre, Largo S. Leonardo Murialdo 1, I-00146 ROMA e-mail: giancarlo.dellaventura@uniroma3.it 2 the host pyroclastic rocks. It shows up as whitish to light gray coloured aggregates of crystals with fibrous aspect and sericeous brightness. Due to the extremely small crystal dimensions, never exceeding 0.5 µm in diameter, the micro-chemical composition of the fibres could be obtained only by combining P-XRD, SEM-EDX and FTIR methods.Infrared spectroscopy, in particular, proved to be a valuable technique to characterize the studied amphibole. The composition determined is that of a Fe-free F-rich (c. 53%) tremolite with significant (c. 20%) richterite components in solid-solution. The occurrence of fibrous tremolite in an inhabited place, occurring as natural geological material rather than being due to anthropogenic pollution, should be examined with concern, because it implies complex health and legal responsibilities in the case of mobilization due to extreme climatic events.

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Valley pond and ignimbrite veneer deposits in the small-volume phreatomagmatic ‘Peperino Albano’ basic ignimbrite, Lago Albano maar, Colli Albani volcano, Italy: influence of topography

Cited by 66 publications

References 22 publications

Paleomagnetic evidence for low-temperature emplacement of the phreatomagmatic Peperino Albano ignimbrite (Colli Albani volcano, Central Italy)

Paleomagnetic evidence for low-temperature emplacement of the phreatomagmatic Peperino Albano ignimbrite (Colli Albani volcano, Central Italy)

The Vesuvius and the other volcanoes of Central Italy

Asbestiform tremolite within the Holocene late pyroclastic deposits of Colli Albani volcano (Latium, Italy): occurrence and crystal chemistry

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