Estimates of rheologic properties for flows on the Martian volcano Ascraeus Mons

Mathematics – Logic

Scientific paper

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Mars Volcanoes, Rheology, Volcanology, Channel Flow, Effusives, Lava, Rhyolite, Viscosity, Yield Strength, Mars, Rheology, Flows, Volcanoes, Ascraeus Mons, Morphology, Strength, Calculations, Viscosity, Lava, Comparisons, Magnitude, Ridges, Basalt, Andesite, Evolution

Scientific paper

Morphological measurements on six well-defined volcanic flows near the summit of the Martian volcano Ascraeus Mons were used to calculate the yield strength and viscosity of the lavas. The results are similar to values obtained for flows on other Martian and terrestrial shield volcanoes. Calculated viscosities are generally higher than measured viscosities for basaltic lavas but considerably smaller than rhyolite or dacite viscosities. The estimated rheologic properties of the Martian flows are most consistent with basaltic or basaltic andesite lavas, but some individual flows could consist of more evolved lavas.

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