author_facet Chiodini, G.
Baldini, A.
Barberi, F.
Carapezza, M. L.
Cardellini, C.
Frondini, F.
Granieri, D.
Ranaldi, M.
Chiodini, G.
Baldini, A.
Barberi, F.
Carapezza, M. L.
Cardellini, C.
Frondini, F.
Granieri, D.
Ranaldi, M.
author Chiodini, G.
Baldini, A.
Barberi, F.
Carapezza, M. L.
Cardellini, C.
Frondini, F.
Granieri, D.
Ranaldi, M.
spellingShingle Chiodini, G.
Baldini, A.
Barberi, F.
Carapezza, M. L.
Cardellini, C.
Frondini, F.
Granieri, D.
Ranaldi, M.
Journal of Geophysical Research: Solid Earth
Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
Paleontology
Space and Planetary Science
Earth and Planetary Sciences (miscellaneous)
Atmospheric Science
Earth-Surface Processes
Geochemistry and Petrology
Soil Science
Water Science and Technology
Ecology
Aquatic Science
Forestry
Oceanography
Geophysics
author_sort chiodini, g.
spelling Chiodini, G. Baldini, A. Barberi, F. Carapezza, M. L. Cardellini, C. Frondini, F. Granieri, D. Ranaldi, M. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2006jb004896 <jats:p>In order to test the potentiality of soil CO<jats:sub>2</jats:sub> diffuse degassing measurements for the study of underground mass and heat transfer in geothermal systems detailed surveys were performed at Latera caldera, which is an excellent test site, because of the abundant available subsurface data. Over 2500 measurements of soil CO<jats:sub>2</jats:sub> flux revealed that endogenous CO<jats:sub>2</jats:sub> at Latera caldera concentrates on a NE‐SW band coinciding with a structural high of fractured Mesozoic limestones hosting a water‐dominated high‐enthalpy geothermal reservoir. The total hydrothermal CO<jats:sub>2</jats:sub> degassing from the structural high has been evaluated at 350 t d<jats:sup>−1</jats:sup> from an area of 3.1 km<jats:sup>2</jats:sup>. It has been estimated that such a CO<jats:sub>2</jats:sub> release would imply a geothermal liquid flux of 263 kg s<jats:sup>−1</jats:sup>, with a heat release of 239 MW. The chemical and isotopic composition of the gas indicates a provenance from the geothermal reservoir and that CO<jats:sub>2</jats:sub> is partly originated by thermal metamorphic decarbonation in the hottest deepest parts of the system and partly has a likely mantle origin. The ratios of CO<jats:sub>2</jats:sub>, H<jats:sub>2</jats:sub>, CH<jats:sub>4</jats:sub>, and CO to Ar were used to estimate the T‐P conditions of the reservoir. Results cluster at T ∼ 200–300°C and P<jats:sub>CO2</jats:sub> ∼ 100–200 bars, close to the actual well measurements. Finally, the approach proved to be an excellent tool to investigate the presence of an active geothermal reservoir at depth and that the H<jats:sub>2</jats:sub>‐CO<jats:sub>2</jats:sub>‐CH<jats:sub>4</jats:sub>‐CO‐Ar gas composition is a useful T‐P geochemical indicator for such CO<jats:sub>2</jats:sub> rich geothermal systems.</jats:p> Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy Journal of Geophysical Research: Solid Earth
doi_str_mv 10.1029/2006jb004896
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Chemie und Pharmazie
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Biologie
Allgemeine Naturwissenschaft
Physik
Technik
Geologie und Paläontologie
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recordtype ai
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series Journal of Geophysical Research: Solid Earth
source_id 49
title Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_unstemmed Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_full Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_fullStr Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_full_unstemmed Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_short Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_sort carbon dioxide degassing at latera caldera (italy): evidence of geothermal reservoir and evaluation of its potential energy
topic Paleontology
Space and Planetary Science
Earth and Planetary Sciences (miscellaneous)
Atmospheric Science
Earth-Surface Processes
Geochemistry and Petrology
Soil Science
Water Science and Technology
Ecology
Aquatic Science
Forestry
Oceanography
Geophysics
url http://dx.doi.org/10.1029/2006jb004896
publishDate 2007
physical
description <jats:p>In order to test the potentiality of soil CO<jats:sub>2</jats:sub> diffuse degassing measurements for the study of underground mass and heat transfer in geothermal systems detailed surveys were performed at Latera caldera, which is an excellent test site, because of the abundant available subsurface data. Over 2500 measurements of soil CO<jats:sub>2</jats:sub> flux revealed that endogenous CO<jats:sub>2</jats:sub> at Latera caldera concentrates on a NE‐SW band coinciding with a structural high of fractured Mesozoic limestones hosting a water‐dominated high‐enthalpy geothermal reservoir. The total hydrothermal CO<jats:sub>2</jats:sub> degassing from the structural high has been evaluated at 350 t d<jats:sup>−1</jats:sup> from an area of 3.1 km<jats:sup>2</jats:sup>. It has been estimated that such a CO<jats:sub>2</jats:sub> release would imply a geothermal liquid flux of 263 kg s<jats:sup>−1</jats:sup>, with a heat release of 239 MW. The chemical and isotopic composition of the gas indicates a provenance from the geothermal reservoir and that CO<jats:sub>2</jats:sub> is partly originated by thermal metamorphic decarbonation in the hottest deepest parts of the system and partly has a likely mantle origin. The ratios of CO<jats:sub>2</jats:sub>, H<jats:sub>2</jats:sub>, CH<jats:sub>4</jats:sub>, and CO to Ar were used to estimate the T‐P conditions of the reservoir. Results cluster at T ∼ 200–300°C and P<jats:sub>CO2</jats:sub> ∼ 100–200 bars, close to the actual well measurements. Finally, the approach proved to be an excellent tool to investigate the presence of an active geothermal reservoir at depth and that the H<jats:sub>2</jats:sub>‐CO<jats:sub>2</jats:sub>‐CH<jats:sub>4</jats:sub>‐CO‐Ar gas composition is a useful T‐P geochemical indicator for such CO<jats:sub>2</jats:sub> rich geothermal systems.</jats:p>
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author Chiodini, G., Baldini, A., Barberi, F., Carapezza, M. L., Cardellini, C., Frondini, F., Granieri, D., Ranaldi, M.
author_facet Chiodini, G., Baldini, A., Barberi, F., Carapezza, M. L., Cardellini, C., Frondini, F., Granieri, D., Ranaldi, M., Chiodini, G., Baldini, A., Barberi, F., Carapezza, M. L., Cardellini, C., Frondini, F., Granieri, D., Ranaldi, M.
author_sort chiodini, g.
container_issue B12
container_start_page 0
container_title Journal of Geophysical Research: Solid Earth
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description <jats:p>In order to test the potentiality of soil CO<jats:sub>2</jats:sub> diffuse degassing measurements for the study of underground mass and heat transfer in geothermal systems detailed surveys were performed at Latera caldera, which is an excellent test site, because of the abundant available subsurface data. Over 2500 measurements of soil CO<jats:sub>2</jats:sub> flux revealed that endogenous CO<jats:sub>2</jats:sub> at Latera caldera concentrates on a NE‐SW band coinciding with a structural high of fractured Mesozoic limestones hosting a water‐dominated high‐enthalpy geothermal reservoir. The total hydrothermal CO<jats:sub>2</jats:sub> degassing from the structural high has been evaluated at 350 t d<jats:sup>−1</jats:sup> from an area of 3.1 km<jats:sup>2</jats:sup>. It has been estimated that such a CO<jats:sub>2</jats:sub> release would imply a geothermal liquid flux of 263 kg s<jats:sup>−1</jats:sup>, with a heat release of 239 MW. The chemical and isotopic composition of the gas indicates a provenance from the geothermal reservoir and that CO<jats:sub>2</jats:sub> is partly originated by thermal metamorphic decarbonation in the hottest deepest parts of the system and partly has a likely mantle origin. The ratios of CO<jats:sub>2</jats:sub>, H<jats:sub>2</jats:sub>, CH<jats:sub>4</jats:sub>, and CO to Ar were used to estimate the T‐P conditions of the reservoir. Results cluster at T ∼ 200–300°C and P<jats:sub>CO2</jats:sub> ∼ 100–200 bars, close to the actual well measurements. Finally, the approach proved to be an excellent tool to investigate the presence of an active geothermal reservoir at depth and that the H<jats:sub>2</jats:sub>‐CO<jats:sub>2</jats:sub>‐CH<jats:sub>4</jats:sub>‐CO‐Ar gas composition is a useful T‐P geochemical indicator for such CO<jats:sub>2</jats:sub> rich geothermal systems.</jats:p>
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spelling Chiodini, G. Baldini, A. Barberi, F. Carapezza, M. L. Cardellini, C. Frondini, F. Granieri, D. Ranaldi, M. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2006jb004896 <jats:p>In order to test the potentiality of soil CO<jats:sub>2</jats:sub> diffuse degassing measurements for the study of underground mass and heat transfer in geothermal systems detailed surveys were performed at Latera caldera, which is an excellent test site, because of the abundant available subsurface data. Over 2500 measurements of soil CO<jats:sub>2</jats:sub> flux revealed that endogenous CO<jats:sub>2</jats:sub> at Latera caldera concentrates on a NE‐SW band coinciding with a structural high of fractured Mesozoic limestones hosting a water‐dominated high‐enthalpy geothermal reservoir. The total hydrothermal CO<jats:sub>2</jats:sub> degassing from the structural high has been evaluated at 350 t d<jats:sup>−1</jats:sup> from an area of 3.1 km<jats:sup>2</jats:sup>. It has been estimated that such a CO<jats:sub>2</jats:sub> release would imply a geothermal liquid flux of 263 kg s<jats:sup>−1</jats:sup>, with a heat release of 239 MW. The chemical and isotopic composition of the gas indicates a provenance from the geothermal reservoir and that CO<jats:sub>2</jats:sub> is partly originated by thermal metamorphic decarbonation in the hottest deepest parts of the system and partly has a likely mantle origin. The ratios of CO<jats:sub>2</jats:sub>, H<jats:sub>2</jats:sub>, CH<jats:sub>4</jats:sub>, and CO to Ar were used to estimate the T‐P conditions of the reservoir. Results cluster at T ∼ 200–300°C and P<jats:sub>CO2</jats:sub> ∼ 100–200 bars, close to the actual well measurements. Finally, the approach proved to be an excellent tool to investigate the presence of an active geothermal reservoir at depth and that the H<jats:sub>2</jats:sub>‐CO<jats:sub>2</jats:sub>‐CH<jats:sub>4</jats:sub>‐CO‐Ar gas composition is a useful T‐P geochemical indicator for such CO<jats:sub>2</jats:sub> rich geothermal systems.</jats:p> Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy Journal of Geophysical Research: Solid Earth
spellingShingle Chiodini, G., Baldini, A., Barberi, F., Carapezza, M. L., Cardellini, C., Frondini, F., Granieri, D., Ranaldi, M., Journal of Geophysical Research: Solid Earth, Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy, Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics
title Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_full Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_fullStr Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_full_unstemmed Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_short Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
title_sort carbon dioxide degassing at latera caldera (italy): evidence of geothermal reservoir and evaluation of its potential energy
title_unstemmed Carbon dioxide degassing at Latera caldera (Italy): Evidence of geothermal reservoir and evaluation of its potential energy
topic Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics
url http://dx.doi.org/10.1029/2006jb004896