Excess Po-210 in 2010 Eyjatjallajokull tephra (Iceland): Evidence for pre-eruptive gas accumulation

• Published in: Earth and Planetary Science Letters
• Main Authors: Sigmarsson, Olgeir, Condomines, Michel, Gauthier, Pierre-Jean
• Other Authors: Laboratoire Magmas et Volcans (LMV), Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: polonium; radon degassing; accumulation in magmas; Po-210-Pb-210-Ra-226 disequilibria; free vapour phase; closed-open system degassing; Eyjafjallajokull volcano; [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry; Eyjafjallajokull; Eyjafjallajökull; Iceland
• Online Access: https://hal.science/hal-01217142; https://doi.org/10.1016/j.epsl.2015.06.054

International audience Excess gas phase in magmas erupting explosively is well known worldwide. However, the origin of this gas phase, in excess of what can be dissolved in the erupting magma at depth, and the rate of gas accumulation is less well defined. The 2010 mildly explosive eruption at Eyjaf...