Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments
International audience This work has made it possible to obtain two new Na/Li geothermometric relationships in addition to the three already known (Fouillac and Michard, 1981; Kharaka et al., 1982) and confirms that the Na/Li geothermometer, unlike the Na/K, Na/K/Ca, K/Mg and silica geothermometers,...
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Online Access: | https://doi.org/10.1016/j.chemgeo.2014.09.011 https://hal-brgm.archives-ouvertes.fr/hal-01074101 |
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fttriple:oai:gotriple.eu:10670/1.tvx78m 2023-05-15T16:49:42+02:00 Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments Sanjuan, Bernard Millot, Romain Asmundsson, Ragnar Michel, Brach Giroud, Niels Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) Iceland GeoSurvey (ISOR ) Nagra NAGRA Financemen européen HITI FP6 European Project: 35108,HITI 2014-10-11 https://doi.org/10.1016/j.chemgeo.2014.09.011 https://hal-brgm.archives-ouvertes.fr/hal-01074101 en eng HAL CCSD Elsevier hal-01074101 doi:10.1016/j.chemgeo.2014.09.011 10670/1.tvx78m https://hal-brgm.archives-ouvertes.fr/hal-01074101 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0009-2541 Chemical Geology Chemical Geology, Elsevier, 2014, 389, pp.60-81. ⟨10.1016/j.chemgeo.2014.09.011⟩ Chemical geothermometer Li isotopes Geothermal fluid Basalt geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.1016/j.chemgeo.2014.09.011 2023-01-22T16:55:13Z International audience This work has made it possible to obtain two new Na/Li geothermometric relationships in addition to the three already known (Fouillac and Michard, 1981; Kharaka et al., 1982) and confirms that the Na/Li geothermometer, unlike the Na/K, Na/K/Ca, K/Mg and silica geothermometers, or the isotope δ18O (H2O-SO4) geothermometer, also depends on the fluid salinity and the nature of the reservoir rocks reacting with the geothermal water. One of the relationships concerns the fluids derived from seawater-basalt interaction processes existing in emerged rifts such as those of Iceland (Reykjanes, Svartsengi, and Seltjarnarnes geothermal fields) and Djibouti (Asal-Ghoubbet and Obock geothermal areas), or in numerous oceanic ridges and rises (Mid-Atlantic and Middle-Valley ridges, East Pacific rise, etc.). The best adapted Na/Li relationship for geothermal fluids discharged from emerged rifts between 0 and 365 °C is: T(K)= 920/[log(Na/Li)−1.105] (r2 = 0.994; n = 27) where Na and Li are the aqueous concentrations of these elements given in mol/L. The other Na/Li relationship was determined using dilute waters collected from wells located in different hightemperature (200-325 °C) volcanic geothermal areas of Iceland (Krafla, Námafjall, Nesjavellir and Hveragerdi). This relationship can be expressed as follows: T(K)= 2002/[log(Na/Li) + 1.322] (r2= 0.967, n= 17). These two relationships give estimations of temperature with an uncertainty close to ±20 °C. The second Na/Li relationship was also successfully applied to HT dilute geothermal waters from the East African Rift (Ethiopia, Kenya). Some case studies in the literature and thermodynamic considerations suggest that the Na/Li ratios for this type of fluids could be controlled by full equilibrium reactions involving a mineral assemblage constituting at least albite, K-feldspar, quartz and clay minerals such as kaolinite, illite (or muscovite) and Li-micas. Unlike the Na/Li ratios, no thermometric relationship using Li isotopes could be determined for this ... Article in Journal/Newspaper Iceland Seltjarnarnes Unknown Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) Námafjall ENVELOPE(-16.820,-16.820,65.631,65.631) Nesjavellir ENVELOPE(-21.251,-21.251,64.115,64.115) Pacific Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Seltjarnarnes ENVELOPE(-21.995,-21.995,64.153,64.153) Chemical Geology 389 60 81 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Chemical geothermometer Li isotopes Geothermal fluid Basalt geo envir |
spellingShingle |
Chemical geothermometer Li isotopes Geothermal fluid Basalt geo envir Sanjuan, Bernard Millot, Romain Asmundsson, Ragnar Michel, Brach Giroud, Niels Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
topic_facet |
Chemical geothermometer Li isotopes Geothermal fluid Basalt geo envir |
description |
International audience This work has made it possible to obtain two new Na/Li geothermometric relationships in addition to the three already known (Fouillac and Michard, 1981; Kharaka et al., 1982) and confirms that the Na/Li geothermometer, unlike the Na/K, Na/K/Ca, K/Mg and silica geothermometers, or the isotope δ18O (H2O-SO4) geothermometer, also depends on the fluid salinity and the nature of the reservoir rocks reacting with the geothermal water. One of the relationships concerns the fluids derived from seawater-basalt interaction processes existing in emerged rifts such as those of Iceland (Reykjanes, Svartsengi, and Seltjarnarnes geothermal fields) and Djibouti (Asal-Ghoubbet and Obock geothermal areas), or in numerous oceanic ridges and rises (Mid-Atlantic and Middle-Valley ridges, East Pacific rise, etc.). The best adapted Na/Li relationship for geothermal fluids discharged from emerged rifts between 0 and 365 °C is: T(K)= 920/[log(Na/Li)−1.105] (r2 = 0.994; n = 27) where Na and Li are the aqueous concentrations of these elements given in mol/L. The other Na/Li relationship was determined using dilute waters collected from wells located in different hightemperature (200-325 °C) volcanic geothermal areas of Iceland (Krafla, Námafjall, Nesjavellir and Hveragerdi). This relationship can be expressed as follows: T(K)= 2002/[log(Na/Li) + 1.322] (r2= 0.967, n= 17). These two relationships give estimations of temperature with an uncertainty close to ±20 °C. The second Na/Li relationship was also successfully applied to HT dilute geothermal waters from the East African Rift (Ethiopia, Kenya). Some case studies in the literature and thermodynamic considerations suggest that the Na/Li ratios for this type of fluids could be controlled by full equilibrium reactions involving a mineral assemblage constituting at least albite, K-feldspar, quartz and clay minerals such as kaolinite, illite (or muscovite) and Li-micas. Unlike the Na/Li ratios, no thermometric relationship using Li isotopes could be determined for this ... |
author2 |
Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) Iceland GeoSurvey (ISOR ) Nagra NAGRA Financemen européen HITI FP6 European Project: 35108,HITI |
format |
Article in Journal/Newspaper |
author |
Sanjuan, Bernard Millot, Romain Asmundsson, Ragnar Michel, Brach Giroud, Niels |
author_facet |
Sanjuan, Bernard Millot, Romain Asmundsson, Ragnar Michel, Brach Giroud, Niels |
author_sort |
Sanjuan, Bernard |
title |
Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
title_short |
Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
title_full |
Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
title_fullStr |
Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
title_full_unstemmed |
Use of two new Na/Li geothermometric relationships for geothermal fluids in volcanic environments |
title_sort |
use of two new na/li geothermometric relationships for geothermal fluids in volcanic environments |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://doi.org/10.1016/j.chemgeo.2014.09.011 https://hal-brgm.archives-ouvertes.fr/hal-01074101 |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) ENVELOPE(-16.820,-16.820,65.631,65.631) ENVELOPE(-21.251,-21.251,64.115,64.115) ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-21.995,-21.995,64.153,64.153) |
geographic |
Krafla Námafjall Nesjavellir Pacific Reykjanes Seltjarnarnes |
geographic_facet |
Krafla Námafjall Nesjavellir Pacific Reykjanes Seltjarnarnes |
genre |
Iceland Seltjarnarnes |
genre_facet |
Iceland Seltjarnarnes |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0009-2541 Chemical Geology Chemical Geology, Elsevier, 2014, 389, pp.60-81. ⟨10.1016/j.chemgeo.2014.09.011⟩ |
op_relation |
hal-01074101 doi:10.1016/j.chemgeo.2014.09.011 10670/1.tvx78m https://hal-brgm.archives-ouvertes.fr/hal-01074101 |
op_rights |
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op_doi |
https://doi.org/10.1016/j.chemgeo.2014.09.011 |
container_title |
Chemical Geology |
container_volume |
389 |
container_start_page |
60 |
op_container_end_page |
81 |
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1766039882930585600 |