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Browsing Greinar- HÍ by Subject "Bergkvika"

Browsing Greinar- HÍ by Subject "Bergkvika"

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    CO2 content beneath northern Iceland and the variability of mantle carbon 
    Hauri, Erik H.; Maclennan, J.; McKenzie, D.; Gronvold, K.; Óskarsson, N.; Shimizu, N. (Geological Society of America, 2017-11-16)
    Primitive basalt melt inclusions from Borgarhraun, northern Iceland, display large correlated variations in CO2 and nonvolatile incompatible trace elements (ITEs) such as Nb, Th, Rb, and Ba. The average CO2/ITE ratios of the Borgarhraun melt inclusion ...
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    Contrasting mechanisms of magma fragmentation during coeval magmatic and hydromagmatic activity: the Hverfjall Fires fissure eruption, Iceland 
    Liu, E. J.; Cashman, K. V.; Rust, A. C.; Höskuldsson, Ármann (Springer Nature, 2017-09-07)
    Growing evidence for significant magmatic vesiculation prior to magma-water interaction (MWI) has brought into question the use of ‘diagnostic’ features, such as low vesicularities and blocky morphologies, to identify hydromagmatic pyroclasts. We address ...
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    A Data Driven Approach to Investigate the Chemical Variability of Clinopyroxenes From the 2014–2015 Holuhraun–Bárdarbunga Eruption (Iceland) 
    Caricchi, Luca; Petrelli, Maurizio; Bali, Eniko; Sheldrake, Tom; Pioli, Laura; Simpson, Guy (Frontiers Media SA, 2020-02-07)
    The Holuhraun–Bárdarbunga (Iceland) eruption lasted approximately 6 months. Magma propagated laterally through a 40 km long dyke, while Bárdarbunga caldera was collapsing. This event was intensely monitored, providing an opportunity to investigate the ...
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    A Preseismic Strain Anomaly Detected Before M6 Earthquakes in the South Iceland Seismic Zone From GPS Station Velocities 
    Arnadottir, Thora; Haines, John; Geirsson, Halldor; Hreinsdóttir, Sigrún (American Geophysical Union (AGU), 2018-12)
    The South Iceland Seismic Zone (SISZ) accommodates E‐W translation due to oblique spreading between the North American and the Eurasian plates in South Iceland with ruptures on N‐S faults. Strain is released in earthquake sequences that last days to ...
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    Seismic Amplitude Ratio Analysis of the 2014-2015 Bárðarbunga-Holuhraun Dike Propagation and Eruption 
    Caudron, Corentin; White, Robert S.; Green, Robert G.; Woods, Jennifer; Agustsdottir, Thorbjorg; Donaldson, Clare; Greenfield, Tim; Rivalta, Eleonora; Brandsdóttir, Bryndís (American Geophysical Union (AGU), 2018-01)
    Magma is transported in brittle rock through dikes and sills. This movement may be accompanied by the release of seismic energy that can be tracked from the Earth's surface. Locating dikes and deciphering their dynamics is therefore of prime importance ...
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    Unexpected large eruptions from buoyant magma bodies within viscoelastic crust 
    Sigmundsson, Freysteinn; Pinel, Virginie; Grapenthin, Ronni; Hooper, Andrew; Halldórsson, Sæmundur Ari; Einarsson, Páll; Ófeigsson, Benedikt G.; Heimisson, Elias; Jónsdóttir, Kristín; Gudmundsson, Magnus Tumi; Vogfjörð, Kristín; Parks, Michelle; Li, Siqi; Drouin, Vincent; Geirsson, Halldor; Dumont, Stéphanie; Friðriksdóttir, Hildur M.; Guðmundsson, Gunnar B.; Wright, Tim J.; Yamasaki, Tadashi (Springer Science and Business Media LLC, 2020-05-15)
    Large volume effusive eruptions with relatively minor observed precursory signals are at odds with widely used models to interpret volcano deformation. Here we propose a new modelling framework that resolves this discrepancy by accounting for magma ...
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    Volatile and light lithophile elements in high-anorthite plagioclase-hosted melt inclusions from Iceland 
    Neave, David A.; Hartley, Margaret E.; Maclennan, John; Edmonds, Marie; Thordarson, Thorvaldur (Elsevier BV, 2017-05)
    Melt inclusions formed during the early stages of magmatic evolution trap primitive melt compositions and enable the volatile contents of primary melts and the mantle to be estimated. However, the syn-and post-entrapment behaviour of volatiles in ...