%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Harris, M. A.
%A Chevrel, Magdalena Oryaelle
%A Parsons, J. T.
%A Latchimy, T.
%A Thordarson, T.
%A Hoeskuldsson, A.
%A Moreland, W. M.
%A Payet-Clerc, M.
%A Kolzenburg, S.
%T Real-time, in situ viscosity mapping of active lava
%D 2024
%L fdi:010093643
%G ENG
%J Geology
%@ 0091-7613
%K ISLANDE
%K LITLI HRUTUR
%M ISI:001425024800017
%N 2
%P 181-185
%R 10.1130/g52558.1
%U https://www.documentation.ird.fr/hor/fdi:010093643
%> https://www.documentation.ird.fr/intranet/publi/2025-04/010093643.pdf
%V 53
%W Horizon (IRD)
%X 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
%$ 060 ; 066