Table 1 Chemical analysis resultsa (wt%) and parameters used for melt viscosity parameterization using the MYEGA equation (Eq. 5)
From: Nanoscale chemical heterogeneities control the viscosity of andesitic magmas
AND100 | AND100red | AND100ox | AND65 | AND0 | |
|---|---|---|---|---|---|
SiO2 | 60.38 (0.36) | 60.47 (0.40) | 60.56 (0.35) | 62.52 (0.19) | 65.91 (0.34) |
TiO2 | 0.79 (0.04) | 0.80 (0.07) | 0.81 (0.06) | 0.56 (0.04) | 0.04 (0.03) |
Al2O3 | 16.69 (0.18) | 16.83 (0.22) | 16.79 (0.19) | 17.28 (0.22) | 18.01 (0.11) |
FeOtot | 6.77 (0.12) | 6.87 (0.12) | 6.76 (0.15) | 4.40 (0.11) | 0.04 (0.03) |
MnO | 0.17 (0.03) | 0.18 (0.04) | 0.18 (0.03) | 0.11 (0.03) | 0.01 (0.01) |
MgO | 3.00 (0.07) | 2.94 (0.06) | 2.95 (0.06) | 3.02 (0.07) | 3.21 (0.06) |
CaO | 6.62 (0.09) | 6.51 (0.11) | 6.49 (0.11) | 6.76 (0.13) | 7.26 (0.11) |
Na2O | 3.50 (0.15) | 3.46 (0.10) | 3.40 (0.10) | 3.49 (0.11) | 3.82 (0.14) |
K2O | 1.58 (0.07) | 1.65 (0.07) | 1.66 (0.06) | 1.70 (0.05) | 1.75 (0.06) |
P2O5 | 0.18 (0.05) | 0.18 (0.05) | 0.18 (0.05) | 0.16 (0.05) | 0.04 (0.03) |
Fe3+/Fetotb | 0.64 (0.03) | 0.27 (0.03) | 0.71 (0.03) | 0.74 (0.03) | — |
NBO/Tc | 0.34 | 0.31 | 0.34 | 0.27 | 0.16 |
K/Gd | 1.57 (0.02) | 1.57 (0.02) | 1.58 (0.02) | 1.53 (0.02) | 1.48 (0.02) |
Tge (°C) | 654 (1) | 645 (1) | 662 (1) | 696 (1) | 737 (1) |
mf | 30.5 (1) | 30.5 (1) | 30.5 (1) | 31 (0.6) | 31.8 (0.2) |
