| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.823 | 0.390 | 6.181 | 8.003 |
| Arsenic | As (ppm) | 4.378 | 1.395 | 2.157 | 10.315 |
| Calcium | Ca (wt%) | 1.905 | 0.137 | 1.261 | 2.240 |
| Copper | Cu (ppm) | 19.805 | 6.378 | 6.219 | 41.666 |
| Iron | Fe (wt%) | 2.981 | 0.441 | 1.982 | 4.154 |
| Mercury | Hg (ppm) | 0.045 | 0.015 | 0.011 | 0.081 |
| Magnesium | Mg (wt%) | 0.988 | 0.137 | 0.812 | 1.477 |
| Manganese | Mn (ppm) | 877.435 | 326.608 | 536.810 | 2517.320 |
| Sodium | Na (wt%) | 2.149 | 0.129 | 1.564 | 2.453 |
| Phosphorus | P (wt%) | 0.062 | 0.015 | 0.031 | 0.112 |
| Lead | Pb (ppm) | 6.380 | 4.160 | 2.032 | 20.556 |
| Selenium | Se (ppm) | 0.157 | 0.042 | 0.101 | 0.297 |
| Titanium | Ti (wt%) | 0.432 | 0.070 | 0.294 | 0.645 |
| Zinc | Zn (ppm) | 55.877 | 13.624 | 36.926 | 107.785 |