Fig. 2: Summary of viscosity results.
From: Nanoscale chemical heterogeneities control the viscosity of andesitic magmas
a Colored symbols represent nanolite-free viscosity data for a homogeneous melt (HOM). Solid lines illustrate MYEGA parametrizations for AND100, AND65 and AND0 (Table 1). b Impact of heterogeneities and iron oxidation state on the viscosity of AND100 compositions. White symbols represent nanolite-bearing viscosity data. The shaded grey region (heterogeneous melt, HET) represents the expected viscosity increase due to nanolite formation. Red arrows depict the isothermal rise in viscosity measured during micropenetration experiments at 660, 723 and 808 °C. The red dashed line shows the viscosity prediction for AND100 using the Giordano et al.39 model. Experimental errors are smaller than symbol sizes.
