Please use this identifier to cite or link to this item:
Authors: Giammanco, S.* 
Bonfanti, P.* 
Carapezza, M. L.* 
Pagliuca, N.* 
Quattrocchi, F.* 
Ricci, T.* 
Sciarra, A.* 
Spampinato, L.* 
Title: Preliminary investigation on soil CO2 and soil CH4 effluxes from a geothermal area near Palagonia (Sicily, Italy)
Issue Date: Sep-2012
Series/Report no.: /21(2012)
Keywords: East Sicily
geothermal systems
mantle degassing
soil CO2 efflux
soil CH4 efflux
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration 
Abstract: The central part of eastern Sicily is characterized by several areas of strong crustal degassing. These gases are mostly carbon dioxide and methane and are particularly concentrated in some focused emissions (gas vents, mud volcanoes) or as diffuse degassing along major faults. In this study, the extent and orientation of soil CO2 and soil CH4 effluxes were investigated on a wide area (about 40 km2) located about 50 km southwest of Mt. Etna (Fig. 1). From a structural point of view, this area lays on a typical foredeep - foreland system that marks the boundary between the southern part of the Eurasian plate and the northern part of the African plate in the central Mediterranean. The situation was further complicated by the tectonic subsidence of the foredeep to the north of the northern Hyblean margin (YELLIN-DROR et alii, 1997; CARBONE et al., 1982) and the formation of a series of ENE-WSW oriented grabens and horsts, the Lentini Graben being the most important of these structures. This area was characterized by both submarine and subaerial volcanism until 1.7-2 Ma (BARBERI et alii, 1974; GRASSO et alii, 1983; GURENKO AND SCHMINCKE, 2002; SCHMINCKE et alii, 1997; TRUA et alii, 1997), and it was affected by strong seismicity in historical times. The surface geology consists of recent alluvial deposits and Plio-Pleistocene clays and sands interbedded with coeval basaltic lavas and pyroclastics of alkaline affinity (CARBONE et alii, 1987). Strong gas emissions in this area have been known since pre-Greek times, as reported by FERRARA (1805). PONTE (1919, 1934) showed that the gas that erupted through Naftìa Lake (located just southwest of the village of Palagonia, see Fig. 1) was pure carbon dioxide and calculated total emissions at about 80,000 t d-1. Today, the main gas emission is exploited for commercial use (Mofeta dei Palici plant, CO2 output estimated as about 250 t d-1, R. Romano pers. comm., 1998). The area is also characterized by several water well with warm (20-50 °C) water. Recent geochemical studies on this area (DE GREGORIO et alii, 2002; CARACAUSI et alii, 2003a, 2003b; GIAMMANCO et alii, 2007) showed that anomalous CO2 degassing has a hydrothermal or magmatic origin and it is linked to the dynamics of Mt. Etna’s plumbing system.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Giammanco.pdfMain article278.39 kBAdobe 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