Non‐Newtonian viscosity of basaltic magma | Zendy

Sonder I. | Zendy; Zimanowski B. | Zendy; Büttner R. | Zendy

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Non‐Newtonian viscosity of basaltic magma

Author(s) -

Sonder I.,

Zimanowski B.,

Büttner R.

Publication year - 2006

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2005gl024240

Subject(s) - basalt , viscosity , rheology , magma , volcanism , newtonian fluid , geology , non newtonian fluid , volcano , thermodynamics , petrology , geophysics , geochemistry , physics , geotechnical engineering , seismology , tectonics

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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