Figure 4
From: Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
External predictions of anhydrous and hydrous viscosity. (a) Measured (symbols) anhydrous and hydrous viscosity data for tephrite (Teph)61 and predictions (lines) using Brillouin velocities (Table 2). Numbers in the legend indicate the water content of samples in wt%. (b) Measured (symbols) anhydrous and hydrous viscosity data for trachyte (Trach)11 and predictions (lines) using Brillouin sound velocities (Table 2). Numbers in the legend indicate the water content of samples in wt%. (c) Measured (symbols) anhydrous viscosity data for the calcalkaline rhyolite RhB10, MSA andesite37,49 and Str basalt50,51. Lines are predictions using the boson peak position (Table 2) derived by Raman spectroscopy.
