Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/6302| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Carreira, P. M.; Instituto Tecnológico e Nuclear, Estrada Nacional n° 10, 2686-953 Sacavém, Portugal | en |
| dc.contributor.authorall | Marques, J. M.; Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal | en |
| dc.contributor.authorall | Carvalho, M. R.; Universidade de Lisboa, Faculdade Ciências, Departamento Geologia, CeGUL, Ed.C6, Campo Grande, 1749-016 Lisboa, Portugal | en |
| dc.contributor.authorall | Capasso, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
| dc.contributor.authorall | Grassa, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
| dc.date.accessioned | 2010-12-13T10:31:09Z | en |
| dc.date.available | 2010-12-13T10:31:09Z | en |
| dc.date.issued | 2010 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/6302 | en |
| dc.description.abstract | Na–HCO3–CO2-rich thermomineral waters issue in the N of Portugal, within the Galicia-Trás-os-Montes region, linked to a major NNE-trending fault, the so-called Penacova-Régua-Verin megalineament. Along this tectonic structure different occurrences of CO2-rich thermomineral waters are found: Chaves hot waters (67 °C) and also several cold (16.1 °C) CO2-rich waters. The δ2H and δ18O values of the thermomineral waters are similar to those of the local meteoric waters. The chemical composition of both hot and cold mineral waters suggests that water–rock reactions are mainly controlled by the amount of dissolved CO2 (g) rather than by the water temperature. Stable carbon isotope data indicate an external CO2 inorganic origin for the gas. δ13CCO2 values ranging between −7.2‰ and −5.1‰ are consistent with a two-component mixture between crustal and mantle-derived CO2. Such an assumption is supported by the 3He/4He ratios measured in the gas phase, are between 0.89 and 2.68 times the atmospheric ratio (Ra). These ratios which are higher than that those expected for a pure crustal origin (≈0.02 Ra), indicating that 10 to 30% of the He has originated from the upper mantle. Release of deep-seated fluids having a mantle-derived component in a region without recent volcanic activity indicates that extensive neo-tectonic structures originating during the Alpine Orogeny are still active (i.e., the Chaves Depression). | en |
| dc.language.iso | English | en |
| dc.publisher.name | Elsevier | en |
| dc.relation.ispartof | Journal of Volcanology and Geothermal Research | en |
| dc.relation.ispartofseries | /189(2010) | en |
| dc.relation.isversionof | http://hdl.handle.net/2122/5728 | en |
| dc.subject | CO2-rich thermomineral waters | en |
| dc.subject | mantle volatiles | en |
| dc.subject | isotopes | en |
| dc.subject | Chaves geothermal system | en |
| dc.subject | N-Portugal | en |
| dc.title | Mantle-derived carbon in Hercynian granites. Stable isotopes signatures and C/He associations in the thermomineral waters, N-Portugal | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 49-56 | en |
| dc.subject.INGV | 03. Hydrosphere::03.02. Hydrology::03.02.02. Hydrological processes: interaction, transport, dynamics | en |
| dc.subject.INGV | 03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes | en |
| dc.subject.INGV | 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters | en |
| dc.subject.INGV | 03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems | en |
| dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.01. Gases | en |
| dc.identifier.doi | 10.1016/j.jvolgeores.2009.10.008 | en |
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Carbon isotope fractionation between dissolved and gaseous carbon dioxide. Chemical Geology 150, 331–337. Truesdel, A.H., Hulston, J.R., 1980. Isotopic evidence on environments of geothermal systems. In: Fritz, P., Fontes, J.Ch. (Eds.), Handbook of Environmental Isotopes Geochemistry. The Terrestrial Environment A, vol. 1. Elsevier, Amsterdam, pp. 179–226. Xu, S., Nakal, S., Wakita, H., Wang, X., 1995. Mantle derived noble gases in natural gases from Songliao Basin, China. Geochimica et Cosmochimica Acta 59 (22), 4675–4683. Zhang, J., Quay, P.D., Wilbur, D.O., 1995. Carbon isotope fractionation during gas–water exchange and dissolution of CO2. Geochimica et Cosmochimica Acta 59, 107–114. | en |
| dc.description.obiettivoSpecifico | 4.5. Studi sul degassamento naturale e sui gas petroliferi | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | reserved | en |
| dc.contributor.author | Carreira, P. M. | en |
| dc.contributor.author | Marques, J. M. | en |
| dc.contributor.author | Carvalho, M. R. | en |
| dc.contributor.author | Capasso, G. | en |
| dc.contributor.author | Grassa, F. | en |
| dc.contributor.department | Instituto Tecnológico e Nuclear, Estrada Nacional n° 10, 2686-953 Sacavém, Portugal | en |
| dc.contributor.department | Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal | en |
| dc.contributor.department | Universidade de Lisboa, Faculdade Ciências, Departamento Geologia, CeGUL, Ed.C6, Campo Grande, 1749-016 Lisboa, Portugal | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italia | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Instituto Tecnológico e Nuclear, Estrada Nacional n° 10, 2686-953 Sacavém, Portugal | - |
| crisitem.author.dept | Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal | - |
| crisitem.author.dept | Universidade de Lisboa, Faculdade de Ciências, Departamento Geologia, Inst. D. Luís, Lisboa, Portugal | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
| crisitem.author.orcid | 0000-0002-5275-1311 | - |
| crisitem.author.orcid | 0000-0002-0890-7948 | - |
| crisitem.author.orcid | 0000-0001-5043-792X | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 03. Hydrosphere | - |
| crisitem.classification.parent | 03. Hydrosphere | - |
| crisitem.classification.parent | 03. Hydrosphere | - |
| crisitem.classification.parent | 03. Hydrosphere | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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