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Geothermometry and chemical equilibria of geothermal fluids from Hveragerdi, SW-Iceland, and selected hot springs Jiangxi province, SE-China

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dc.contributor Jarðhitaskóli Háskóla Sameinuðu þjóðanna is
dc.contributor.author Zhanxue, Sun is
dc.date.accessioned 2020-06-09T17:12:05Z
dc.date.available 2020-06-09T17:12:05Z
dc.date.issued 1998
dc.identifier.issn 1670-7427
dc.identifier.uri http://hdl.handle.net/10802/23401
dc.description Myndefni: kort, línurit, töflur. is
dc.description.abstract Solute-mineral equilibrium studies suggest that geothermal fluids from wells are close to equilibrium with hydrothermal alteration minerals but boiling/degassing and mixing in upflow zones lead to departure from equilibrium for thermal waters from hot springs in the Hveragerdi high-temperature geothermal field, SE-Iceland. The solute geothermometers and the log(Q/K) method give the subsurface temperatures ranging from 183 °C to 204 °C on average which compare well with the measured aquifer temperatures. Gas geothermometers indicate subsurface temperatures around 180-260 °C reflecting the temperature decrease trend from north to south in this field. The temperature of the reservoir water was estimated to be about 210 °C to 260 °C by applying three mixing models. By integration of water and steam geochemical studies with temperature logging data from wells, a conceptual model was constructed for the geothermal field. In this report, the water chemistry and subsurface temperatures of two selected hot spring areas, in Jiangxi Province, SE-China were also discussed. The chalcedony geothermometer gives a subsurface temperatures of 70-100 °C for the low-temperature geothermal areas. The cold water fraction is estimated from tritium concentration to be 20-30% in the mixed waters. Results of this study suggest that secondary carbonate minerals may be close to equilibrium with solution although an overall equilibrium of mineral-solution is not attained in the low-temperature systems. is
dc.format.extent 1 rafrænt gagn (28 bls.) is
dc.language.iso en
dc.publisher United Nations University is
dc.publisher Orkustofnun is
dc.relation.ispartofseries United Nations University., UNU Geothermal Training Programme, Iceland. Report ; 1998:14
dc.relation.uri http://www.os.is/gogn/unu-gtp-report/UNU-GTP-1998-14.pdf
dc.subject Jarðhiti is
dc.subject Jarðhitarannsóknir is
dc.subject Jarðefnafræði is
dc.subject Efnafræði is
dc.subject Jarðfræði is
dc.subject Hverir is
dc.subject Orkulindir is
dc.subject Hveragerði is
dc.subject Kína is
dc.title Geothermometry and chemical equilibria of geothermal fluids from Hveragerdi, SW-Iceland, and selected hot springs Jiangxi province, SE-China en
dc.title.alternative Geothermal training in Iceland en
dc.type Bók is
dc.identifier.gegnir 001516416


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