From: Magnetic petrology of pumice fall deposits of the 1783 eruption of Asama volcano, Japan
No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|
(wt.%) | |||||||
SiO2 | 0.31 | 0.44 | 0.30 | 0.43 | 0.43 | 0.00 | 0.00 |
TiO2 | 9.49 | 13.41 | 13.51 | 11.21 | 8.77 | 42.41 | 42.11 |
FeO* | 78.81 | 76.27 | 76.81 | 78.22 | 78.29 | 52.85 | 52.52 |
MgO | 2.68 | 2.52 | 2.36 | 2.65 | 3.60 | 2.83 | 3.02 |
Al2O3 | 3.17 | 2.55 | 2.53 | 2.68 | 3.47 | 0.36 | 0.34 |
CaO | 0.54 | 0.06 | 0.00 | 0.00 | 0.02 | 0.04 | 0.03 |
MnO | 0.31 | 0.36 | 0.33 | 0.35 | 0.27 | 0.28 | 0.27 |
Total | 95.31 | 95.60 | 95.83 | 95.54 | 94.84 | 98.75 | 98.30 |
Recalculated | |||||||
FeO | 35.76 | 40.11 | 40.44 | 38.06 | 34.44 | 32.77 | 32.18 |
Fe2O3 | 47.84 | 40.19 | 40.42 | 44.63 | 48.73 | 22.31 | 22.61 |
Total | 100.10 | 99.62 | 99.88 | 100.01 | 99.72 | 100.99 | 100.56 |
Xusp (mol%) | 27.26 | 38.77 | 36.41 | 32.54 | 25.63 | ||
Xil (mol%) | 78.76 | 78.44 |