@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS043 prodottidellaricerca:prodotto prodotto:ID29156 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA39154 pubblicazioni:autoreCNRDi prodotto:ID29156 . @prefix unitaDiPersonaleEsterno: . unitaDiPersonaleEsterno:ID177 pubblicazioni:autoreCNRDi prodotto:ID29156 . @prefix modulo: . modulo:ID3164 prodottidellaricerca:prodotto prodotto:ID29156 . @prefix rdf: . prodotto:ID29156 rdf:type prodotto:TIPO1101 . @prefix retescientifica: . prodotto:ID29156 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID29156 rdfs:label "New chemical and original isotopic data on waters from El Tatio geothermal field, northern Chile (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID29156 pubblicazioni:anno "2005-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID29156 skos:altLabel "
Cortecci G.; Boschetti T.; Mussi M.; Herrera Lameli C.; Mucchino C.; Barbieri M. (2005)
New chemical and original isotopic data on waters from El Tatio geothermal field, northern Chile
in Geochemical Journal
"^^rdf:HTML ; pubblicazioni:autori "Cortecci G.; Boschetti T.; Mussi M.; Herrera Lameli C.; Mucchino C.; Barbieri M."^^xsd:string ; pubblicazioni:paginaInizio "547"^^xsd:string ; pubblicazioni:paginaFine "571"^^xsd:string ; pubblicazioni:numeroVolume "39"^^xsd:string . @prefix ns12: . prodotto:ID29156 pubblicazioni:rivista ns12:ID394195 ; pubblicazioni:note "n.6"^^xsd:string ; pubblicazioni:pagineTotali "25"^^xsd:string ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "Cortecci G. - Istituto di Geoscienze e Georisorse, Area della Ricerca CNR, Via Moruzzi 1, I-56124 Pisa, Italy; Boschetti T. - Dipartimento di Scienze della Terra, University of Parma, Parco Area delle Scienze 157/A, I-43100 Parma, Italy; Mussi M. - Istituto di Geoscienze e Georisorse, Area della Ricerca CNR, Via Moruzzi 1, I-56124 Pisa, Italy; Herrera Lameli C. - Departamento de Ciencias Geol\u00F3gicas, Universidad Cat\u00F3lica del Norte, Avenida Angamos 0610, Antofagasta, Chile; Mucchino C. - Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, University of Parma, Parco Area delle Scienze 17A, I-43100, Parma, Italy; Barbieri M. - Dipartimento di Scienze della Terra, \\\"La Sapienza\\\" University of Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy"^^xsd:string ; pubblicazioni:titolo "New chemical and original isotopic data on waters from El Tatio geothermal field, northern Chile"^^xsd:string ; prodottidellaricerca:abstract "The El Tatio geothermal field is located at an height of 4200-4300 m on the Cordillera de los Andes (Altiplano). Geysers, hot pools and mudpots in the geothermal field and local meteoric waters were sampled in April 2002 and analyzed for major and trace elements, ?2H, ?18O and 3H of water, ?34S and ?18O of dissolved sulfate, ?13C of dissolved total carbonate, and 87Sr/86Sr ratio of aqueous strontium.\nThere are two different types of thermal springs throughout the field, that are chloride-rich water and sulfate-rich water. The chemical composition of chloride springs is controlled by magma degassing and by water-rock interaction processes. Sulfate springs are fed by shallow meteoric water heated by ascending gases. In keeping with the geodynamic setting and nature of the reservoir rocks, chloride water is rich in As, B, Cs, Li; on the other hand, sulfate water is enriched only in B relative to local meteoric water.\nAlternatively to a merely meteoric model, chloride waters can be interpreted as admixtures of meteoric and magmatic (circa andesitic) water, which moderately exchanges oxygen isotopes with rocks at a chemical Na/K temperature of about 270\u00B0C in the main reservoir, and then undergoes loss of vapor (and eventually mixing with shallow water) and related isotopic effects during ascent to the surface. These chloride waters do not present tritium and can be classified as submodern (pre-1952). A chloride content of 5,400 mg/l is estimated in the main reservoir, for which ?2H and ?18O values, respectively of -78? and -6.9?, are calculated applying the multistage-steam separation isotopic effects between liquid and vapor. From these data, the meteoric recharge (Cl ? 0 mg/l) of the main reservoir should approach a composition of -107? in ?2H and -14.6? in ?18O, when a magmatic water of ?2H = -20?, ?18O = +10? and Cl = 17,500 mg/l is assumed.\nThe 87Sr/86Sr ratios of the hot springs are quite uniform (0.70876 to 0.70896), with values within the range observed for dacites of the Andean central volcanic zone. A water ?18O-87Sr/86Sr model was developed for the main geothermal reservoir, by which a meteoric-magmatic composition of the fluids is not excluded.\nThe uniform ?34S(SO4 2-) values of +1.4 to +2.6? in the chloride waters agree with a major deep-seated source for sulfur, possibly via hydrolysis in the geothermal reservoir of sulfur dioxide provided by magma degassing, followed by isotopic exchange between sulfate and sulfide in the main reservoir. This interpretation is supported by the largely negative ?34S(SO4 2-) value in steam-heated water sulfate (-9.8?) and mass-balance calculation, which exclude leaching at depth of igneous iron-sulfides with ?34S near zero per mill.\nAll the ?13C values of total carbonate in the chloride waters are negative, with variable values from -9.2 to -20.1?, pointing to an important proportion of biogenic carbon in the fluids. The interpretation of these data is problematic, and a number of alternative explanations are reported in the text."@en ; prodottidellaricerca:prodottoDi modulo:ID3164 , istituto:CDS043 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA39154 , unitaDiPersonaleEsterno:ID177 . @prefix parolechiave: . prodotto:ID29156 parolechiave:insiemeDiParoleChiave . ns12:ID394195 pubblicazioni:rivistaDi prodotto:ID29156 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID29156 .