Geysir Group Publications

2015

Geilert S., Vroon P.Z., Keller N.S., Gudbrandsson S., Stefánsson A. and van Bergen M.J. (2015): Silicon isotope fractionation during silica precipitation from hot-spring waters: Evidence from the Geysir geothermal field, Iceland. Geochimica et Cosmochimica Acta 164 (403-427), doi: 10.1016/j.gca.2015.05.043.


Gislason S.R., Stefánsdóttir G., Pfeffer M.A., Barsotti S., Jóhannsson Th., Galeczka I., Bali E., Sigmarsson O, Stefánsson A., Keller N.S., Sigurdsson Á., Bergsson B., Galle B., Jacobo V.C., Arellano S., Aiuppa A., Jónasdóttir E.B., Eiríksdóttir E.S., Jakobsson S., Gudfinnsson G.H., Halldórsson S.A., Gunnarsson H., Haddadi B., Jónsdóttir I., Thordarson Th., Riishus M., Högnadóttir Th., Dürig T., Pedersen G.M., Höskuldsson Á. and Gudmundsson M.T. (2015): Environmental pressure from the 2014-15 eruption at Bárðarbunga volcano, Iceland. Geochemical Perspectives Letters 1 (84-93), doi: 10.7185/geochemlet.1509


Stefánsson A., Keller N.S., Gunnarsson Robin J. and Ono S. (2015): Multiple sulfur isotope systematics of Icelandic geothermal fluids and the source and reactions of sulfur in volcanic geothermal systems at divergent plate boundaries. Geochimica et Cosmochimica Acta 165, 307-323, doi: 10.1016/j.gca.2015.05.045

2014

Keller N.S., Stefánsson A. and Sigfússon B:  Determination of Arsenic Speciation in Sulfidic Waters by Ion Chromatography Hydride-Generation Atomic Fluorescence Spectrometry (IC-HG-AFS)Talanta 128, 466-472, doi: 10.1016/j.talanta.2014.04.035


Keller N.S., Stefánsson A. and Sigfússon B:  Arsenic speciation in natural sulfidic geothermal waters. Geochim. Cosmochim. Acta 142, 15-26, doi: 10.1016/j.gca.2014.08.007


Stefánsson, A., Kaasalainen, H., Keller, N.S., Gunnarssson, I., Sigfússon, B. 2014. Disequilibrium aqueous speciation and chemical energy in hydrothermal systems. Surtsey at 50 years – 2014 ICDP workshop, Vestman Islands, Iceland, September-October 2014.

2013

Stefánsson A., Keller N.S. and Sigfússon B. (2013) Arsenic speciation in sulfidic geothermal waters. GSA Abstract 45


Keller N.S., Stefánsson A., Ono S. and Gunnarsson Robin J. (2013) Sulfur isotope systematics of geothermal fluids, Krafla, Iceland. Min. Mag. 77, 1445.

2012

Ono S., Keller N.S., Rouxel O. and Alt J.C (2012): Sulfur-33 constraints on the origin of secondary pyrite in altered oceanic basement. Geochim. Cosmochim. Acta, 87, 323-340, doi: 10.1016/j.gca.2012.04.016

2011

Keller N.S., Stefánsson A., Kaasalainen H., Sigfússon B. (2011) Volatile Transport and Reactions in Geothermal Systems: Arsenic and Sulfur in Icelandic Hot Springs and Wells. ICGG 11, 75-76


Keller N.S., Stefansson A., Sigfusson B. (2011) Arsenic Speciation in Geothermal Waters. AGU 2011 fall meeting, V13D-2639.


Keller N.S., Stefánsson A., Sigfússon B. (2011) Arsenic Speciation in Geothermal Waters. Icelandic Geological Soc. Spring meeting 2011, 47-48.


Resing, J.A., Rubin, K.H., Embley R.W., Lupton J.E., Baker, E.T., Dziak R.P., Baumberger, T., Lilley, M.D., Huber, J.A., Shank, T.M., Butterfield, D.A., Clague, D.A., Keller, N.S., Merle, S.G., Buck, N.J., Michael, P.J., Soule, A., Caress, D.W., Walker, S.L., Davis, R., Cowen, J.P., Reysenbach, A.L. and Thomas, H. (2011): Active submarine eruption of boninite in the northeastern Lau Basin. Nat. Geosci., 4 (11), 799-806, DOI: 10.1038/NGEO1275

2009

Clague, D.A., Rubin, K.H. and Keller, N.S. (2009), Products of submarine fountains and bubble-burst eruptive activity at 1200m on West Mata Volcano, Lau Basin, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V43I-02.


Evans K. A., O'Neill H. St. C., Mavrogenes J. A., Keller N. S., Jang L.-Y and Lee, J-F. (2009): XANES evidence for sulphur speciation in Mn-, Ni- and W-bearing silicate melts. Geochim. Cosmochim. Acta, 73, 6847 – 6867, doi:10.1016/j.gca.2009.08.013 


Keller, N.S., Rubin, K.H:, Clague, D.A., Michael, P.J., Resing, J.A., Resing, J.A., Cooper, L.B., Shaw, A.M., Ono, S. and Tamura, Y. (2009), Sulfur in submarine eruptions: Observations and preliminary data from West Mata, NE Lau Basin, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V43I-08


Keller, N.S:, Ono, S., and Shaw, A.M. (2009), The fate of sulfur in late-stage magmatic processes: insights from quadruple sulfur isotopes, Eos Trans. AGU, 90(22), Jt. Assem. Suppl., Abstract V13E-05


Michael, P.J., Escrig, S., Rubin, K.H., Cooper, L.B., Langmuir, C.H., Clague, D.A., Keller, N.S. and Plank, T. (2009), Major and trace elements and volatiles in glasses from the 2009 rapid response expedition to West Mata volcano and Northeast Lau Spreading Center (NELSC), Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V51D-1720


Rubin, K.H., Embley, R.W., Clague, D.A., Resing, J.A., Michael, P.J., Keller, N.S. and Baker, E.T., Lavas from active boninite and very recent basalt eruptions at two submarine NE Lau Basin sites, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V43I-05

2008

Evans K. A., Mavrogenes J. A., O'Neill H. St., Keller N. S., and Jang L.-Y. (2008) A preliminary investigation of chlorine XANES in silicate glasses. Geochem., Geophys., Geosyst., 9, doi:10.1029/2008GC002157. 


Keller, N. S., R. J. Arculus, J. Hermann, and S. Richards (2008), Submarine back-arc lava with arc signature: Fonualei Spreading Center, northeast Lau Basin, Tonga. J. Geophys. Res., 113, B08S07, doi: 10.1029/2007JB005451.


Keller, N.S. and Shaw, A.M. (2008), Does the depth to slab control volatile contents? New insights from glasses erupted at the Fonualei Spreading Center (NE Lau Basin), a very arc-like back-arc, Eos Trans. AGU, 89(53), Fall Meet. Suppl., abstract V31A-2123


Keller, N.S.: Metals and volatiles in melts: an experimental and field study. PhD thesis, 219p., Australian National University.

2007

Keller, N.S. and Mavrogenes, J.A. (2007), Processing micronuggets-containing LA-ICP-MS data, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract V22B-02

2006

Keller, N.S., Arculus, R.J. and Hermann, J. (2006) Back arc basalt with subduction signature?, Eos Trans. AGU, 87(52), Fall Meet. Suppl., Abstract V31D-0614


Keller, N.S., Mavrogenes, J.A. and Scaillet, B. (2006), The solubility of copper in hydrous rhyolitic melts: the effects of oxygen, chlorine and sulfur. Geochim. Cosmochim. Acta, 70 (18), A311, DOI:10.1016/j.gca.2006.06.630

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