Table 3.
Average weight percentages of each analyzed element in wt %, of all ash samples of the studied active volcanoes (Mn<1%, Ti and P<1.5%)
Si | Al | Ca | Fe | Na | Mg | K | S | |
---|---|---|---|---|---|---|---|---|
Pichincha | 47.16 | 17.71 | 8.74 | 9.35 | 5.12 | 2.44 | 5.16 | 1.58 |
Cotopaxi | 41.56 | 20.30 | 13.43 | 9.28 | 5.35 | 1.78 | 2.76 | 3.25 |
Tungurahua | 45.09 | 17.20 | 10.92 | 10.65 | 4.91 | 2.37 | 4.35 | 1.45 |
Reventador | 44.30 | 16.78 | 10.95 | 10.25 | 4.83 | 1.98 | 5.46 | 2.89 |
Sangay | 41.06 | 16.67 | 14.20 | 8.64 | 6.03 | 2.77 | 3.90 | 2.58 |