Geysir Group Publications

2015

Kaasalainen, H., Stefánsson, A., Giroud, N., Arnórsson, S. (2015) The geochemistry of trace elements in geothermal fluids, Iceland. Applied Geochemistry 62, 207-223, http://dx.doi.org/10.1016/j.apgeochem.2015.02.003.

Stefánsson, A., Gunnarsson, I., Kaasalainen, H., Arnórsson, S. (2015) Chromium geochemistry and speciation in natural waters, Iceland. Applied Geochemistry 62, 200-206, http://dx.doi.org/10.1016/j.apgeochem.2014.07.007.

2013

Stefánsson A., Gunnarsson I., Kaasalainen H. and Arnórsson S. (2013) Chromium chemistry and speciation in natural waters associated with mafic rocks, Iceland. GSA Abstract 45


Kaasalainen H., Stefánsson A., Gunnarsson I. and Arnórsson S. (2013) Chromium chemistry in natural waters, Iceland. Mineralogical Magazine 77, 1414.

2011

Gunnarsson, I., Sigfússon, B., Stefánsson, A., Arnórsson, S.,  Scott, S.M., Gunnlaugsson, E. (2011) Injection of H2S from Hellisheiði power plant, Iceland. 36th Stanford GeothermalWorkshop, 


Scott S., Gunnarsson I., Stefánsson A., Arnórsson S., Gunnlaugsson E. (2011) Gas Chemistry of the Hellisheiði Geothermal Field. EGPD 2011, Reykjavik, Iceland.


Stefánsson, A., Arnórsson, S., Gunnarsson, I., Kaasalainen, H., Gunnlaugsson, E. (2011) The geochemistry and sequestration of H2S into geothermal system at Hellisheidi, Iceland. J.Volcanol. Geotherm. Res. 202, 179-188.

2010

Arnórsson S., Angcoy E., Bjarnason J.Ö., Giroud N., Gunnarsson I., Kaasalainen H., Karingithi C., Stefánsson A. (2010) Gas Chemistry of Volcanic Geothermal Systems. Proceedings World Geothermal Congress 2010,  Bali, Indonesia 25-29 April 2010.


Stefánsson, A., Arnórsson, S., Gunnarsson, I., Gysi, A.P., Kaasalainen, H., Gunnlaugsson, E. (2010) H2S and CO2 sequestration in geothermal systems. Geochim. Cosmochim. Acta 74, Suppl.1., A991. Goldschmidt conference, Knoxville, Tennessee, June 2010.

2009

Kaasalainen, H., Stefansson, A., Giroud, N., Arnórsson, S. (2009) Metal transport by geothermal and volcanic vapour. Geochim.Cosmochim. Acta 73 Supplement, A610. Goldschmidt Conference, Davos, Switzerland, July 2009.


Kaasalainen, H., Stefánsson, A., Prapaipong, P., Giroud. N., Arnórsson, S., Shock, E. (2009) Metal transport by geothermal and volcanic vapor. Eos Trans. AGU 90(52), Fall meeting Suppl., abstract V51G-04.


Stefánsson, A., Arnórsson, S., Gunnarsson, I. Kaasalainen, H. 2009. Förgun brennisteins frá Hellisheiðarvirkjun Jarðefnafræðileg athugun. Orkuveita Reykjavikur. RH-14-2009. (Report in Icelandic).


Stefansson, S., Arnórsson, S., Gunnarsson, I., Kaasalainen, H.S. (2009) H2S sequestration from Hellisheidi Power Plant – a geochemical investigation. Sci. Inst. Report, RH-14-2009.

2007

Arnórsson S., Stefánsson A., and Bjarnason J.Ö. (2007) Fluid-Fluid Interactions in Geothermal Systems. Rev. Mineral. Geochem. 65, 259-312.

2006

Arnórsson S., Bjarnason J.Ö., Giroud N., Gunnarsson I., and Stefánsson A. (2006) Sampling and analysis of geothermal fluids. Geofluids 6, 203-216.

2005

Arnórsson, S. and Stefánsson, A. (2005) Wet-steam well discharges. II. Assessment of aquifer fluid compositions. World Geothermal Congress.

2002

Arnórsson, S., Gunnarsson, I., Stefánsson, A., Andrésdóttir, A., and Sveinbjörnsdóttir, Á.E. (2002) Major element chemistry of surface- and ground waters in basaltic terrain, N-Iceland. I. Primary mineral saturation. Geochimica et Cosmochimica Acta 66, 4015-4046.


Stefánsson A. and Arnórsson, S. (2002). Gas pressures and redox reactions in geothermal systems in Iceland. Chemical Geology 190, 251-271.


Arnórsson, S., Stefánsson, A., and Gunnarsson, I. (2002) Primary basalt mineral saturation in surface- and up to 90°C ground waters in Skagafjördur, N-Iceland. Annual Meeting of the Icelandic Geoscience Society, Oct. 2002.


Arnórsson, S., and Stefánsson, A. (2002) Assessment of scaling potential from supercritical geothermal fluids. IDDP/ICDP Workshop Oct. 2002.

2001

Stefánsson, A., Gíslason, S.R., and Arnórsson, S. (2001) Dissolution of primary minerals of basalt in natural waters II. Mineral saturation state. Chemical Geology 172, 251-276.

2000

Stefánsson A. and Arnórsson, S. (2000) Saturation state of feldspars in natural waters. Geochimica et Cosmochimica Acta 64, 2567-2584.


Arnórsson, S. and Stefánsson, A. (2000) Mineral-solution equilibria in groundwater systems. Goldschmidt 2000, Journal of Conference Abstracts 5, 155-156.

1999

Arnórsson, S. and Stefánsson, A. (1999) Assessment of feldspar solubility constants in water in the range 0º to 350ºC at vapor saturation pressure. American Journal of Science 299, 173-209.


Stefánsson, A. and Arnórsson, S. (1999) Feldspar equilibria in geothermal waters. In Proceedings of the 5th international symposium on geochemistry of the Earth’s surfaces, Balkema Press, 543-546.

1998

Stefánsson, A., Arnórsson, S., and Gíslason, S.R. (1998) Saturation state of primary basaltic minerals in natural waters.  In Geochemistry of the Crustal Fluids, Characterisation of reactive transport in natural systems, Aghia Pelaghia Greece, 22-27. May 1998, 62.

1997

Arnórsson, S. and Stefánsson, A. (1997) Assessment of feldspar solubility in waters in the range 0-350 ºC at Psat. Science Institute Report, University of Iceland, RH-33-97, 50 pp


Arnórsson, S., Sveinbjörnsdóttir, Á.E., Andrésdóttir, A., Gunnarsson, I., and Stefánsson, A. (1997) Geothermal waters in Skagafirdi: origin and age. Spring Meeting Icel. Geol. Sco. 1997, 44-47.


Arnórsson, S., Andrésdóttir, A., Gunnarsson, I., and Stefánsson, A. (1997) New calibration of the NaK and quartz geothermometers. Spring Meeting Icel. Geol. Sco. 1997, 42-43.

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