Giordano, Guido

Isaia, Roberto

Rowley, Peter

Silleni, Aurora

English

The drilling of the Mediterranean Sea near Pozzuoli and Napoli Bay is the topic of this research. The aim of this work is to evaluate the thickness of the Campanian Ignimbrite (CI) eruption at sea, in order to complete an isopach map developed for the PDC of CI and fasten data from drilling with seismic lines that already exist. The isopach map is essential to calculate a new accurate volume value, a key topic in the eruptive history of Campi Flegrei

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                          Silleni, A., Giordano, G., Isaia, R., & Rowley, P. (2018). The relevenceof studying the areal and thickness distribution in the MediterraneanSea of the CAmpanian Ignimbrite, Campi Flegrei, Italy. Poster sessionpresented at Workshop IODP-Italia Lo stato delle proposte diperforazione nell’area mediterranea, Rome, Italy.Peer reviewed versionLink to publication record in Explore Bristol ResearchPDF-documentUniversity of Bristol - Explore Bristol ResearchGeneral rightsThis document is made available in accordance with publisher policies. Please cite only thepublished version using the reference above. Full terms of use are available:http://www.bristol.ac.uk/red/research-policy/pure/user-guides/ebr-terms/The relevance of studying the areal and thickness distribution in the Mediterranean Sea of  Campanian Ignimbrite, Campi Flegrei, ItalyA. Silleni#1, G. Giordano1, R. Isaia2, P.J. Rowley3 # Correspondence to aurora.silleni@uniroma3.it1 Dipartimento di Scienze Geologiche, Università di Roma Tre, Largo S. Leonardo Murialdo 1, 00154, Rome, Italy2 Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Vesuviano, Via Diocleziano 328, 80124 Naples, Italy3 School of Environmental Sciences, University of Hull, Hull, United KingdomFig. 1 Preliminary isopach map of Campanian Ignimbrite, Campi Flegrei. Isopach lines in the Campanian plain and Mediterranean Sea are from bibliography (Scandone et al. 1991; Rolandi et al. 2003). Red stars point out possible areas for ocean drilling, which could fasten seismic lines already performed. Google Terrain on QGIS was used like a base map for this work.ReferencesGiaccio B, Hajdas I, Isaia R, Deino A, Nomade S (2017) High-precision 14C and 40Ar/39Ar dating of the Campanian Ignimbrite (Y-5) reconciles the time-scales of climatic-cultural processes at 40 ka. Scientific Reports, 7Fisher R V., Orsi G, Ort MH, Heiken G (1993) Mobility of a large-volume pyroclastic flow - emplacement of the Campanian ignimbrite, Italy. J Volcanol Geotherm Res 56:205–220. doi: 10.1016/0377-0273(93)90017-LMilia A (1999) Aggrading and prograding infill of a peri-Tyrrhenian basin (Naples Bay, Italy). Geo-Marine Lett 19:237–244. doi: 10.1007/s003670050114Rolandi G, Bellucci F, Heizler MT, et al (2003) Tectonic controls on the genesis of ignimbrites from the Campanian Volcanic Zone, southern Italy. Mineral Petrol 79:3–31. doi: 10.1007/s00710-003-0014-4Scandone R, Bellucci F, Lirer L, Rolandi G (1991) The structure of the Campanian Plain and the activity of the Neapolitan volcanoes (Italy). J Volcanol Geotherm Res 48:1–31. doi: 10.1016/0377-0273(91)90030-4Scarpati C, Sparice D, Perrotta A (2014) A crystal concentration method for calculating ignimbrite volume from distal ash-fall deposits and a reappraisal of the magnitude of the Campanian Ignimbrite. J Volcanol Geotherm Res 280:67–75. doi: 10.1016/j.jvolgeores.2014.05.009The study of large scale explosive eruptions and their deposits is essential to understand the eruptive dynamics of active volcanoes as Campi Flegrei. Campanian Ignimbrite (CI) is the largest caldera forming eruption of Campi Flegrei, which occurred 39 ka (Giaccio et al. 2017). The main CI is interpreted as emplaced by a highly energetic and dilute PDC that travelled more than 80 km from the source, over an area of > 30.000 km2, and surmounted ridges more than 1000 m high (Fisher et al. 1993). Despite the large number of works regarding volume estimation of the eruption, the calculation of volume DRE ranges from 23 to 300 km3 (Scarpati et al. 2014).Isopach map is a significant work instrument intended to show the dispersion of pyroclastic deposits, as well as the thickness of deposits and dispersal area in relationship to paleotopography. In the Napoli Bay CI is more than 100 m thick (Milia 1999; Rolandi et al. 2003), but data about Pozzuoli Bay and Mediterranean area are still missing. Seismic study data exist for the Napoli Bay, however, there is a lack of borehole data to gather the physical properties of CI (e.g. seismic velocity) to convert travel times to unit thicknesses across the survey areas. Furthermore, it is difficult to recognize CI compared to other volcanic deposits from Campi Flegrei or Vesuvio in the seismic data so tying to borehole data is necessary. Define the paleo environment and the position of coastline 40 ka Figure out the physical properties, the thickness and the areal distribution of Campanian Ignimbrite Calculate a new accurate volume value

The relevence of studying the areal and thickness distribution in the Mediterranean Sea of the CAmpanian Ignimbrite, Campi Flegrei, Italy

http://hdl.handle.net/1983/fa929768-bc32-42fe-a2b8-e02defb0e4b6

The relevence of studying the areal and thickness distribution in the Mediterranean Sea of the CAmpanian Ignimbrite, Campi Flegrei, Italy

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