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Geochemical methods in geothermal surface exploration

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Titill: Geochemical methods in geothermal surface explorationGeochemical methods in geothermal surface exploration
Höfundur: Finnbogi Óskarsson 1978 ; Halldór Ármannsson 1942 ; KenGen ; Geothermal Development Company Ltd. ; Jarðhitaskóli Háskóla Sameinuðu þjóðanna ; United Nations University ; United Nations University, Geothermal Training Programme
URI: http://hdl.handle.net/10802/16094
Útgefandi: United Nations University
Útgáfa: 2017
Ritröð: United Nations University., UNU Geothermal Training Programme, Iceland. Short Course ; SC-25
Efnisorð: Jarðfræði; Jarðefnafræði; Jarðhitaleit
ISSN: 1670-794x
Tungumál: Enska
Tengd vefsíðuslóð: https://orkustofnun.is/gogn/unu-gtp-sc/UNU-GTP-SC-25-0301.pdf
Tegund: Bók
Gegnir ID: 991009895339706886
Athugasemdir: Presented at SDG Short Course II on Exploration and Development of Geothermal Resources, organized by UNU-GTP, GDC and KenGen, at Lake Bogoria and Lake Naivasha, Kenya, Nov. 9-29, 2017.
Útdráttur: Geothermal water is mostly meteoric and oceanic water in origin, but has been altered by interaction with rock and in some cases magmatic fluids. Geothermal waters have been classified with respect to their anion and cation contents into alkalichloride water, acid sulphate water, acid sulphate-chloride water and bicarbonate water. Acid waters are generally unsuitable for elucidation of subsurface properties. Conservative constituents are used for tracing origin and flow of geothermal fluids, stable isotopes (especially 2 H and 18O) along with B and Cl being most important, whereas rock-forming constituents (e.g. SiO2, Na, K, Ca, Mg, CO2, H2) are used to predict subsurface temperatures. Measurements of soil gas concentrations and flux can be useful for delineating fractures or other permeable structures relevant to flow paths in geothermal systems.


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