Harris M. A., Chevrel Magdalena Oryaelle, Parsons J. T., Latchimy T., Thordarson T., Hoeskuldsson A., Moreland W. M., Payet-Clerc M., Kolzenburg S. (2024). Real-time, in situ viscosity mapping of active lava. Geology, 53 (2), 181-185. ISSN 0091-7613.
Titre du document
Real-time, in situ viscosity mapping of active lava
Année de publication
2024
Auteurs
Harris M. A., Chevrel Magdalena Oryaelle, Parsons J. T., Latchimy T., Thordarson T., Hoeskuldsson A., Moreland W. M., Payet-Clerc M., Kolzenburg S.
Source
Geology, 2024,
53 (2), 181-185 ISSN 0091-7613
Viscosity is a fundamental physical property that controls lava flow dynamics, runout distance, and velocity, which are critical factors in assessing and mitigating risks associated with effusive eruptions. Natural lava viscosity is driven by a dynamic interplay among melt, crystals, and bubbles in response to the emplacement conditions. These conditions are challenging to replicate in laboratory experiments, yet this remains the most common method for quantifying lava rheology. Few in situ viscosity measurements exist, but none of those constrains the spatial evolution of viscosity along an entire active lava flow field. Here, we present the first real-time, in situ viscosity map of active lava as measured in the field at Litli-Hrútur, Iceland. We precisely measured a lava viscosity increase of over two orders of magnitude, associated with a temperature decrease, crystallinity increase, and vesicularity decrease from near-vent to distal locations, crossing the p
Plan de classement
Sciences de la Terre : généralités [060]
;
Géophysique interne [066]
Description Géographique
ISLANDE
Localisation
Fonds IRD [F B010093643]
Identifiant IRD
fdi:010093643
