Opin vísindi

Fletta eftir höfundi "Stefansson, Andri"

Fletta eftir höfundi "Stefansson, Andri"

Röðun: Raða: Niðurstöður:

  • Icon
    Abiogenesis not required to explain the origin of volcanic-hydrothermal hydrocarbons 
    Fiebig, J.; Stefansson, Andri; Ricci, A.; Tassi, F.; Viveiros, F.; Silva, S.; Lopez, T.M.; Schreiber, C.; Hofmann, S.; Mountain, B.W. (European Association of Geochemistry, 2019-07-29)
    Abiotic formation of n-alkane hydrocarbons has been postulated to occur within Earth's crust. Apparent evidence was primarily based on uncommon carbon and hydrogen isotope distribution patterns that set methane and its higher chain homologues apart ...
  • Icon
    Corrosion testing of materials in simulated superheated geothermal environment 
    Thorhallsson, Andri Isak; Stefansson, Andri; Kovalov, Danyil; Karlsdóttir, Sigrún (Elsevier BV, 2020-05)
    This paper reports the results of corrosion study for carbon steel, austenitic stainless steel, as well as titanium and nickel-based alloys which were tested in a simulated superheated geothermal environment (SSGE) in flow-through reactors to investigate ...
  • Icon
    Environmental pressure from the 2014–15 eruption of Bárðarbunga volcano, Iceland 
    Gíslason, Sigurður Reynir; Stefansdottir, Gerdur; Pfeffer, Melissa; Barsotti, Sara; Jóhannsson, Th.; Galeczka, Iwona Monika; Bali, Eniko; Sigmarsson, Olgeir; Stefansson, Andri; Keller, Nicole Simone; Sigurðsson, Á.; Bergsson, Bergur H.; Galle, B.; Jacobo, V.C; Arellano, S.; Aiuppa, A.; Jónasdóttir, Elín Björk; Eiríksdóttir, E.S.; Jakobsson, Sigurður; Guðfinnsson, Guðmundur; Halldórsson, Sæmundur Ari; Gunnarsson, H.; Haddadi, B.; Jonsdottir, Ingibjorg; Thordarson, Thorvaldur; Riishuus, Morten; Högnadóttir, Thórdís; Dürig, Tobias; Pedersen, Gro; Höskuldsson, Ármann; Gudmundsson, Magnus Tumi (European Association of Geochemistry, 2015)
    The effusive six months long 2014-2015 Bárðarbunga eruption (31 August-27 February) was the largest in Iceland for more than 200 years, producing 1.6 ± 0.3 km3 of lava. The total SO2 emission was 11 ± 5 Mt, more than the amount emitted from Europe ...
  • Icon
    Ground-Based Measurements of the 2014–2015 Holuhraun Volcanic Cloud (Iceland) 
    Pfeffer, Melissa; Bergsson, Baldur; Barsotti, Sara; Stefansdottir, Gerdur; Galle, Bo; Arellano, Santiago; Conde, Vladimir; Donovan, Amy; Ilyinskaya, Evgenia; Burton, Mike; Aiuppa, Alessandro; Whitty, Rachel; Simmons, Isla; Arason, Þórður; Jónasdóttir, Elín; Keller, Nicole; Yeo, Richard; Arngrímsson, Hermann; Jóhannsson, Þorsteinn; Butwin, Mary; Askew, Robert; Dumont, Stéphanie; von Löwis, Sibylle; Ingvarsson, Þorgils; La Spina, Alessandro; Thomas, Helen; Prata, Fred; Grassa, Fausto; Giudice, Gaetano; Stefansson, Andri; Marzano, Frank; Montopoli, Mario; Mereu, Luigi (MDPI AG, 2018-01-18)
    he 2014–2015 Bárðarbunga fissure eruption at Holuhraun in central Iceland was distinguished by the high emission of gases, in total 9.6 Mt SO2, with almost no tephra. This work collates all ground-based measurements of this extraordinary eruption cloud ...
  • Icon
    Impact of fluid-rock interaction on water uptake of the Icelandic crust: Implications for the hydration of the oceanic crust and the subducted water flux 
    Kleine, Barbara Irene; Stefansson, Andri; Halldorsson, Saemundur; Barnes, J.D. (Elsevier BV, 2020)
    Oceanic crust is a major transport medium of water into the mantle wedge and the convecting mantle. Yet, the water content of the oceanic crust remains uncertain. Active geothermal systems situated at on-land spreading centers provide a unique opportunity ...
  • Icon
    Silicon and oxygen isotopes unravel quartz formation processes in the Icelandic crust 
    Kleine, Barbara Irene; Stefansson, Andri; Halldórsson, Sæmundur Ari; Whitehouse, M.J.; Jónasson, Kristján (European Association of Geochemistry, 2018-04)
    Quartz formation processes in the Icelandic crust were assessed using coupled δ18O and δ30Si systematics of silica deposits formed over a wide temperature range (<150 to >550 °C). Magmatic quartz reveals δ18O (-5.6 to +6.6 ‰) and δ30Si (-0.4 ± 0.2 ‰) ...
  • Icon
    Supercritical Fluid Geochemistry in Geothermal Systems 
    Heřmanská, Matylda; Kleine, Barbara Irene; Stefansson, Andri (Hindawi Limited, 2019-08-05)
    Supercritical fluids exist in the roots of many active high-temperature geothermal systems. Utilization of such supercritical resources may multiply energy production from geothermal systems; yet, their occurrence, formation mechanism, and chemical ...
  • Icon
    The Surtsey volcano geothermal system: An analogue for seawater-oceanic crust interaction with implications for the elemental budget of the oceanic crust 
    Kleine, Barbara Irene; Stefansson, Andri; Kjartansdóttir, Ríkey; Prause, Simon; Weisenberger, Tobias B.; Reynolds, Hannah Iona; Sveinbjörnsdóttir, Árný; Jackson, Marie D.; Gudmundsson, Magnus Tumi (Elsevier BV, 2020-09)
    Surtsey is a young volcanic island in the offshore extension of Iceland's southeast rift zone that grew from the seafloor during explosive and effusive eruptions in 1963–1967. In 1979, a cored borehole (SE-1) was drilled to 181 m depth and in 2017 three ...
  • Icon
    SUSTAIN drilling at Surtsey volcano, Iceland, tracks hydrothermal and microbiological interactions in basalt 50 years after eruption 
    Jackson, Marie D.; Gudmundsson, Magnus Tumi; Weisenberger, Tobias B.; Rhodes, J. Michael; Stefansson, Andri; Kleine, Barbara Irene; Lippert, Peter C.; Marquardt, Joshua M.; Reynolds, Hannah Iona; Kück, Jochem; Marteinsson, Viggó; Vannier, Pauline; Bach, Wolfgang; Barich, Amel; Bergsten, Pauline; Bryce, Julia G.; Cappelletti, Piergiulio; Couper, Samantha; Fahnestock, M. Florencia; Gorny, Carolyn F.; Grimaldi, Carla; Groh, Marco; Guðmundsson, Ágúst; Gunnlaugsson, Ágúst T.; Hamlin, Cédric; Högnadóttir, Thórdís; Jónasson, Kristján; Jónsson, Sigurður S.; Jørgensen, Steffen L.; Klonowski, Alexandra M.; Marshall, Beau; Massey, Erica; McPhie, Jocelyn; Moore, James G.; Olafsson, Einar Sindri; Onstad, Solveig L.; Perez, Velveth; Prause, Simon; Snorrason, Snorri P.; Türke, Andreas; White, James D. L.; Zimanowski, Bernd (Copernicus GmbH, 2019-06-12)
    The 2017 Surtsey Underwater volcanic System for Thermophiles, Alteration processes and INnovative concretes (SUSTAIN) drilling project at Surtsey volcano, sponsored in part by the International Continental Scientific Drilling Program (ICDP), provides ...