Eruptive history of Neapolitan volcanoes: constraints from 40Ar–39Ar dating | Geological Magazine | Cambridge Core

The city of Naples can be considered part of the Campi Flegrei volcanic field, and deposits within the urban area record many autochthonous pre- to post-caldera eruptions. Age measurements were carried out using 40Ar–39Ar dating techniques on samples from small monogenetic vents and more widely distributed tephra layers. The 40Ar–39Ar ages on feldspar phenocrysts yielded ages of c. 16 ka and 22 ka for events older than the Neapolitan Yellow Tuff caldera-forming eruption (15 ka), and ages of c. 40 ka, 53 ka and 78 ka for events older than the Campanian Ignimbrite caldera-forming eruption (39 ka). The oldest age obtained is 18 ka older than previous dates for pyroclastic deposits cropping out along the northern rim of Campi Flegrei. The results of this study allow us to divide the Campi Flegrei volcanic history into four main, geochronologically distinct eruptive cycles. A new period, the Paleoflegrei, occurred before 74–78 ka and has been proposed to better discriminate the ancient volcanism in the volcanic field. The eruptive history of Campi Flegrei extends possibly further back than this, but the products of previous eruptions are difficult to date owing to the lack of fresh juvenile clasts. These new geochronological data, together with recently published ages related to young volcanic edifices located in the city of Naples (Nisida volcano, 3.9 ka) testify to persistent activity over a period of at least 80 ka, with an average eruption recurrence interval of ~555 years within and adjacent to this densely populated city.

Alessio, M., Bella, F., Improta, S., Belluomini, G., Cortesi, C. & Turi, B. 1973. University of Rome Carbon-14 dates X. Radiocarbon 15, 165–78.Google Scholar

Barberi, F., Innocenti, F., Lirer, L., Munno, R., Pescatore, T. S. & Santacroce, R. 1978. The Campanian Ignimbrite: a major prehistoric eruption in the Neapolitan area (Italy). Bulletin of Volcanology 41, 10–22.Google Scholar

Bebbington, M. & Cronin, S. J. 2011. Spatio-temporal hazard estimation in the Auckland Volcanic Field, New Zealand, with a new event-order model. Bulletin of Volcanology 73, 55–72.Google Scholar

Bellucci, F., Milia, A., Rolandi, G. & Torrente, M. M. 2006. Structural control on the Upper Pleistocene ignimbrite eruptions in the Neapolitan area (Italy): volcano tectonic faults versus caldera faults. In Volcanism in the Campania Plain: Vesuvius, Campi Flegrei and Ignimbrites (ed. De Vivo, B.), pp. 163–80. Elsevier.CrossRefGoogle Scholar

Breislak, S. 1801. Voyage phisiques et litologiqıes dans la Campanie. Paris.Google Scholar

Bruno, P. G., Rapolla, A. & Di Fiore, V. 2003. Structural setting of the Bay of Naples (Italy) seismic reflection data: implications for Campanian volcanism. Tectonophysics 372, 193–213.Google Scholar

Cole, P. D., Perrotta, A. & Scarpati, C. 1994. The volcanic history of the southern part of the city of Naples. Geological Magazine 131, 785–99.Google Scholar

de’ Gennaro, M., Cappelletti, P., Langella, A., Perrotta, A. & Scarpati, C. 1999. Genesis of zeolites in the Neapolitan Yellow Tuff: geological, volcanological and mineralogical evidence. Contributions to Mineralogy and Petrology 139, 17–35.CrossRefGoogle Scholar

Deino, A. L., Orsi, G., de Vita, S. & Piochi, M. 2004. The age of the Neapolitan Yellow Tuff caldera-forming eruption (Campi Flegrei caldera – Italy) assessed by ⁴⁰Ar/³⁹Ar dating method. Journal of Volcanology and Geothermal Research 133, 157–70.CrossRefGoogle Scholar

De Lorenzo, G. 1904. L'attività vulcanica nei Campi Flegrei. Reniconti Accademia Scienze Fisiche e Maematiche 10, 204–21.Google Scholar

de Vita, S., Orsi, G., Civetta, L., Carandente, A., D'Antonio, M., Deino, A., di Cesare, T., Di Vito, M. A., Fisher, R. V., Isaia, R., Marotta, E., Necco, A., Ort, M., Pappalardo, L., Piochi, M. & Southon, J. 1999. The Agnano-M Spina eruption (4100 years BP) in the restless Campi Flegrei caldera (Italy). Journal of Volcanology and Geothermal Research 91, 269–301.Google Scholar

De Vivo, B., Rolandi, G., Gans, P. B., Calvert, A., Bohrson, W. A., Spera, F. J. & Belkin, H. E. 2001. New constraints on the pyroclastic eruptive history of the Campanian Volcanic Plain (Italy). Mineralogy and Petrology 73, 47–65.CrossRefGoogle Scholar

Di Girolamo, P., Ghiara, M. R., Lirer, L., Munno, R., Rolandi, G. & Stanzione, A. 1984. Vulcanologia e petrologia dei Campi Flegrei. Bollettino della Società Geolologica Italiana 103, 349–413.Google Scholar

Di Vito, M. A., Isaia, R., Orsi, G., Southon, J., de Vita, S., D'Antonio, M., Pappalardo, L. & Piochi, M. 1999. Volcanism and deformation since 12000 years at the Campi Flegrei caldera (Italy). Journal of Volcanology and Geothermal Research 91, 221–46.Google Scholar

Di Vito, M. A., Sulpizio, R., Zanchetta, G. & D'Orazio, M. 2008. The late Pleistocene pyroclastic deposits of the Campanian Plain: new insights into the explosive activity of Neapolitan volcanoes. Journal of Volcanology and Geothermal Research 177, 19–48.CrossRefGoogle Scholar

Fedele, L., Insinga, D. D., Calvert, A. T., Morra, V., Perrotta, A. & Scarpati, C. 2011. ⁴⁰Ar/³⁹Ar dating of tuff vents in the Campi Flegrei caldera (southern Italy): toward a new chronostratigraphic reconstruction of the Holocene volcanic activity. Bulletin of Volcanology 73, 1323–36.CrossRefGoogle Scholar

Fedele, L., Scarpati, C., Lanphere, M., Melluso, L. & Morra, V. 2008. The Breccia Museo formation, Campi Flegrei, southern Italy: geochronology, chemostratigraphy and relationship with the Campanian Ignimbrite eruption. Bulletin of Volcanology 70, 1189–219.CrossRefGoogle Scholar

Insinga, D., Calvert, A., D'Argenio, B., Fedele, L., Lanphere, M., Morra, V., Perrotta, A., Sacchi, M. & Scarpati, C. 2004. ⁴⁰Ar/³⁹Ar dating of the Neapolitan Yellow Tuff eruption (Campi Flegrei, southern Italy): volcanological and chronostratigraphic implications. In European Geophysical Union (EGU) 1^st General Assembly, Nice, 2004.Google Scholar

Judenherc, S. & Zollo, A. 2004. The Bay of Naples (southern Italy): constraints on the volcanic structures inferred from a dense seismic survey. Journal of Geophysical Research 109, B10312, doi: 10.1029/2003JB002876, 10 pp.Google Scholar

Lanphere, M., Champion, D., Melluso, L., Morra, V., Perrotta, A., Scarpati, C., Tedesco, D. & Calvert, A. 2007. ⁴⁰Ar/³⁹Ar ages of the AD 79 eruption of Vesuvius, Italy. Bulletin of Volcanology 69, 259–63.Google Scholar

Milia, A. 2010. The stratigraphic signature of volcanism offshore Campi Flegrei (Naples Bay, Italy). In Stratigraphy and Geology of Volcanic Areas (eds Groppelli, G. & Viereck-Goette, L.), pp. 155–70. Geological Society of America Special Paper 464.Google Scholar

Orsi, G., de Vita, S. & Di Vito, M. 1996. The restless, resurgent Campi Flegrei nested caldera (Italy): constraints on its evolution and configuration. Journal of Volcanology and Geothermal Research 74, 179–214.Google Scholar

Orsi, G., Di Vito, M. A. & Isaia, R. 2004. Volcanic hazard assessment at the restless Campi Flegrei caldera. Bulletin of Volcanology 66, 514–30.CrossRefGoogle Scholar

Pappalardo, L., Civetta, L., D'Antonio, M., Deino, A., Di Vito, M., Orsi, G., Carandente, A., de Vita, S., Isaia, R. & Piochi, M. 1999. Chemical and Sr-isotopic evolution of the Phlegrean magmatic system before the Campanian Ignimbrite and the Neapolitan Yellow Tuff eruptions. Journal of Volcanology and Geothermal Research 91, 141–66.Google Scholar

Perrotta, A. & Scarpati, C. 1994. The dynamics of Breccia Museo eruption (Campi Flegrei, Italy) and the significance of spatter clasts associated with lithic breccias. Journal of Volcanology and Geothermal Research 59, 335–55.CrossRefGoogle Scholar

Perrotta, A., Scarpati, C., Luongo, G. & Morra, V. 2006. The Campi Flegrei caldera boundary in the city of Naples. In Volcanism in the Campania Plain: Vesuvius, Campi Flegrei and Ignimbrites (ed. De Vivo, B.), pp. 85–96. Elsevier.Google Scholar

Perrotta, A., Scarpati, C., Luongo, G. & Morra, V. 2010. Stratigraphy and volcanological evolution of the southwestern sector of Campi Flegrei and Procida Island, Italy. In Stratigraphy and Geology of Volcanic Areas (eds Groppelli, G. & Viereck-Goette, L.), pp. 171–91. Geological Society of America Special Paper 464.Google Scholar

Rittmann, A. 1950. Sintesi geologica dei Campi Flegrei. Bollettino Società Geologica Italiana 69, 117–28.Google Scholar

Rosi, M. & Sbrana, A. 1987. Phlegraean Fields. CNR – Quaderni della Ricerca Scientifica 114–9, 1–175.Google Scholar

Scandone, R., Giacomelli, L. & Fattori Speranza, F. 2006. The volcanological history of the volcanoes of Naples: a review. Developments in Volcanology 9, 1–26.Google Scholar

Scarpati, C., Cole, P., & Perrotta, A. 1993. The Neapolitan Yellow Tuff – a large volume multiphase eruption from Campi Flegrei, Southern Italy. Bulletin of Volcanology 55, 343–56.Google Scholar

Scarpati, C. & Perrotta, A. 2012. Erosional characteristics and behaviour of large pyroclastic density currents. Geology, published online 22 August 2012. doi: 10.1130/G33380.1.Google Scholar

Scherillo, A. & Franco, E. 1960. Rilevamento stratigrafico del territorio comunale di Napoli. Bollettino della Società Naturale 69, 255–62.Google Scholar

Vezzoli, L. (ed.) 1988. Island of Ischia. CNR – Quaderni della Ricerca Scientifica 114–10, 1–133.Google Scholar

Wohletz, K. H. 1983. Mechanisms of hydrovolcanic pyroclast formation: grain-size, scanning electron microscopy, and experimental results. Journal of Volcanology and Geothermal Research 17, 31–63.Google Scholar