| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.258 | 0.387 | 2.640 | 4.074 |
| Arsenic | As (ppm) | 3.940 | 0.740 | 2.378 | 6.273 |
| Calcium | Ca (wt%) | 0.627 | 0.200 | 0.207 | 1.278 |
| Copper | Cu (ppm) | 9.223 | 2.879 | 4.201 | 22.743 |
| Iron | Fe (wt%) | 1.780 | 0.251 | 1.284 | 2.394 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.288 | 0.061 | 0.186 | 0.439 |
| Manganese | Mn (ppm) | 406.829 | 111.493 | 223.369 | 753.644 |
| Sodium | Na (wt%) | 0.273 | 0.050 | 0.169 | 0.413 |
| Phosphorus | P (wt%) | 0.024 | 0.004 | 0.015 | 0.035 |
| Lead | Pb (ppm) | 19.222 | 8.801 | 9.091 | 62.618 |
| Selenium | Se (ppm) | 0.123 | 0.041 | 0.100 | 0.336 |
| Titanium | Ti (wt%) | 0.190 | 0.020 | 0.151 | 0.238 |
| Zinc | Zn (ppm) | 41.283 | 5.673 | 30.177 | 58.762 |