Non-Newtonian viscosity of basaltic magma

Details Non-Newtonian viscosity of basaltic magma Non-Newtonian viscosity of basaltic magma

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3302303s&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 2, CiteID L02303

Physics

8

Tectonophysics: Physics Of Magma And Magma Bodies, Volcanology: Effusive Volcanism, Volcanology: Lava Rheology And Morphology, Volcanology: Physics And Chemistry Of Magma Bodies, Volcanology: Instruments And Techniques

Scientific paper

Basaltic melt drives most of earth's volcanism. Understanding its rheology is crucial for any model of magma transport and volcanic eruption. Basaltic magma is generally treated as a quasi Newtonian liquid, but there are observations of Non-Newtonian behaviour. With a method, that allows measurement of Non-Newtonian viscosity of a representative melt (molten basaltic rock), we found a strong shear rate dependency of viscosity in a wide range of temperatures. The temperature-viscosity dependency indicates properties of the molten phase as the cause. The viscosity data are in good agreement with a power law model.

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