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Browsing by Subject "Geochemistry"

Browsing by Subject "Geochemistry"

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    Breiðdalur Central Volcano. What came first: the central volcano or the fissure swarm? 
    Askew, Robert Alexander (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2020-01)
    The Breiðdalur volcanic system, eastern Iceland, comprises of a ~600 km3 central volcano, a 30 - 40 km long dyke swarm and plateau basalts erupted from this dyke swarm. The entire volcanic system was active from 10.1 to 7.8 Ma, the central volcano was ...
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    Hydroclimate in the Pamirs Was Driven by Changes in Precipitation‐Evaporation Seasonality Since the Last Glacial Period 
    Aichner, Bernhard; Makhmudov, Zafar; Rajabov, Ilhomjon; Zhang, Qiong; Pausata, Francesco S. R.; Werner, Martin; Heinecke, Liv; Kuessner, Marie L.; Feakins, Sarah J.; Sachse, Dirk; Mischke, Steffen (American Geophysical Union (AGU), 2019-12-03)
    The Central Asian Pamir Mountains (Pamirs) are a high-altitude region sensitive to climatic change, with only few paleoclimatic records available. To examine the glacial-interglacial hydrological changes in the region, we analyzed the geochemical ...
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    Magma reservoir dynamics at Toba caldera, Indonesia, recorded by oxygen isotope zoning in quartz 
    Budd, David A.; Troll, Valentin R.; Deegan, Frances M.; Jolis, Ester M.; Smith, Victoria C.; Whitehouse, Martin J.; Harris, Chris; Freda, Carmela; Hilton, David R.; Halldorsson, Saemundur; Ilya N., Ilya N. (Springer Nature, 2017-01-25)
    Quartz is a common phase in high-silica igneous rocks and is resistant to post-eruptive alteration, thus offering a reliable record of magmatic processes in silicic magma systems. Here we employ the 75 ka Toba super-eruption as a case study to show ...
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    The magmatic evolution, eruptive history and geothermal reservoir assessment of the Paka volcanic complex, Northern Kenya rift 
    MIBEI, GEOFFREY (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2021-10)
    In this study, the magmatic evolution and the eruptive history of the Paka volcanic complex are investigated and its geothermal reservoir is assessed. The study comprises two parts. The first part deals with the eruptive history, magma evolution, and ...
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    Rapid CO2 mineralisation into calcite at the CarbFix storage site quantified using calcium isotopes 
    Pogge von Strandmann, Philip A. E.; Burton, Kevin W.; Snæbjörnsdóttir, Sandra Ósk; Sigfússon, Bergur; Aradóttir, Edda S.; Gunnarsson, Ingvi; Alfreðsson, Helgi A.; Mesfin, Kiflom G.; Oelkers, Eric H.; Gíslason, Sigurður Reynir (Springer Science and Business Media LLC, 2019-04-30)
    The engineered removal of atmospheric CO 2 is now considered a key component of mitigating climate warming below 1.5 °C. Mineral carbonation is a potential negative emissions technique that, in the case of Iceland’s CarbFix experiment, precipitates ...
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    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 ...
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    The timing and mechanisms of sulfur release by Icelandic flood lava eruptions: Holuhraun 2014–15 CE and Laki 1783–84 CE a case study. 
    Gallagher, Catherine Rachael (University of Iceland, School of Engineering and Natural Sciences, Faculty of Earth Sciences, 2021)
    Flood lavas (FL), or high magnitude (1–100 km3) basaltic fissure eruptions have a recurrence interval of 250–500 years in Iceland. These events can produce atmospheric volcanic pollution at tropospheric–stratospheric levels via their sulfur (S) emissions. ...