Fluxes Of Deep Co2 In The Volcanic Areas Of Central-Southern Italy

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Journal Article: Fluxes Of Deep Co2 In The Volcanic Areas Of Central-Southern Italy

Abstract
Both the shallow (organic-derived) and deep (mantellic-magmatic-metamorphic) fluxes of CO2 (ΦCO2, mass time-1) and specific fluxes of CO2 (φCO2 mass time-1 surface-1) dissolving in the shallow groundwaters of the volcanic areas of Amiata, Vulsini-Vico-Sabatini, Albani, Roccamonfina, Vesuvio, Vulture, and Etna were evaluated by partitioning the composed population of total dissolved inorganic carbon in two individual populations and subsequent subtraction of local background population. The flux of deep CO2 released from the geothermal fields of Piancastagnaio (Amiata), Torre Alfina, Latera, Marta, Bracciano south, Cesano, and Mofete and from the Overall Northern Latium Hydrothermal Reservoir were also evaluated by means of the total surface heat flux and the enthalpy and CO2 molality of the single liquid phase circulating in each geothermal reservoir. These data suggest that the φCO2 released to the atmosphere varies from 9.5_106 to 3.0_106 mol year-1 km-2, over the geothermal fields of Bracciano south and Cesano, respectively, and that a total ΦCO2 of 3.8_108 mol year-1 is cumulatively released from the geothermal fields of Torre Alfina, Latera and Cesano extending over an area of only 66 km2. In addition, a flux of ~2.2_1011 to 3.8_1011 mol year-1 of gaseous CO2 entering the atmosphere is obtained for the entire anomalous area of central Italy, extending from the Tyrrhenian coastline to the Apennine chain (45,000 km2). Thus terrestrial CO2 emission in central-southern Italy appears to be a significant carbon source.

Authors 
Barbara Gambardella, Carlo Cardellini, Giovanni Chiodini, Francesco Frondini, Luigi Marini, Giulio Ottonello and Marino Vetuschi Zuccolini








Published Journal 
Journal of Volcanology and Geothermal Research, 2004





DOI 
Not Provided
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Citation

Barbara Gambardella,Carlo Cardellini,Giovanni Chiodini,Francesco Frondini,Luigi Marini,Giulio Ottonello,Marino Vetuschi Zuccolini. 2004. Fluxes Of Deep Co2 In The Volcanic Areas Of Central-Southern Italy. Journal of Volcanology and Geothermal Research. (!) .