Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5818
AuthorsVoltattorni, N.* 
Sciarra, A.* 
Quattrocchi, F.* 
TitleThe application of soil gas technique to geothermal exploration:study of “hidden” potential geothermal systems
Issue Date25-Apr-2010
URIhttp://hdl.handle.net/2122/5818
Keywordsgeothermal exploration
soil-gas
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration 
AbstractGeochemical studies were conducted using soil-gas and flux surveyings for locating both permeable zones in buried reservoirs and the presence of possible gaseous haloes linked to active geothermal systems. In this work we focused our interest on the distribution of soil-gas concentrations (Rn, Th, He, H2, O2, N2, CO2, CH4 and H2S) in the soil air of the Tetitlan area (Nayarit, Mexico) considered a potential thermal field and characterized by scarcity of surface manifestations. A total of 154 soil-gas samples and 346 CO2 and CH4 flux measurements were collected in an area of about 80 square kilometres. The performed soil-gas and flux geochemical surveys highlighted a general rising patterns linked to local fault system, with the important implication that the highest CO2 and CH4 fluxes, as well as Rn concentrations, could be used in undeveloped geothermal systems to identify main upflow regions and areas of increased and deep permeability.
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