Please use this identifier to cite or link to this item:
Authors: Di Napoli, R.* 
Aiuppa, A.* 
Sulli, A.* 
Caliro, S.* 
Chiodini, G.* 
Acocella, V.* 
Ciraolo, G.* 
Di Vito, M. A.* 
Interbartolo, F.* 
Nasello, C.* 
Valenza, M.* 
Title: Hydrothermal fluid venting in the offshore sector of Campi Flegrei caldera: A geochemical, geophysical and volcanological study
Issue Date: 2016
Series/Report no.: 10/17 (2016)
DOI: 10.1002/2016GC006494
Keywords: Hydrothermal fluid
Campi Flegrei caldera
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous 
Abstract: The ongoing unrest at the Campi Flegrei caldera (CFc) in southern Italy is prompting exploration of its poorly studied offshore sector. We report on a multidisciplinary investigation of the Secca delle Fumose (SdF), a submarine relief known since antiquity as the largest degassing structure of the offshore sector of CFc. We combined high-resolution morphobathymetric and seismostratigraphic data with onshore geological information to propose that the present-day SdF morphology and structure developed during the initial stages of the last CFc eruption at Monte Nuovo in AD 1538. We suggest that the SdF relief stands on the eastern uplifted border of a N-S-trending graben-like structure formed during the shallow emplacement of the Monte Nuovo feeding dike. We also infer that the high-angle bordering faults that generated the SdF relief now preferentially allow the ascent of hot brines (with an equilibrium temperature of 1798C), thereby sustaining hydrothermal degassing on the seafloor. Systematic vertical seawater profiling shows that hydrothermal seafloor venting generates a sizeable CO2, pH, and temperature anomaly in the overlying seawater column. Data for the seawater vertical profile can be used to estimate the CO2 and energy (heat) outputs from the SdF area at 50 tons/d ( 0.53 kg/s) and 80 MW, respectively. In view of the cause-effect relationship with the Monte Nuovo eruption, and the substantial gas and energy outputs, we consider that the SdF hydrothermal system needs to be included in monitoring programs of the ongoing CFc unrest.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
di_dinapoli et al G3 2016 10.1002_2016GC006494(1).pdf2.31 MBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Aug 17, 2018


checked on Aug 17, 2018

Google ScholarTM