| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.022 | 0.266 | 1.280 | 2.537 |
| Arsenic | As (ppm) | 6.616 | 1.888 | 3.795 | 12.062 |
| Calcium | Ca (wt%) | 0.061 | 0.025 | 0.040 | 0.254 |
| Copper | Cu (ppm) | 6.005 | 0.864 | 4.087 | 9.483 |
| Iron | Fe (wt%) | 1.566 | 0.270 | 0.974 | 2.523 |
| Mercury | Hg (ppm) | 0.023 | 0.005 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.112 | 0.017 | 0.075 | 0.152 |
| Manganese | Mn (ppm) | 439.760 | 105.495 | 138.069 | 806.511 |
| Sodium | Na (wt%) | 0.072 | 0.017 | 0.032 | 0.113 |
| Phosphorus | P (wt%) | 0.024 | 0.004 | 0.018 | 0.056 |
| Lead | Pb (ppm) | 11.538 | 1.582 | 8.087 | 15.815 |
| Selenium | Se (ppm) | 0.259 | 0.066 | 0.104 | 0.395 |
| Titanium | Ti (wt%) | 0.163 | 0.029 | 0.079 | 0.213 |
| Zinc | Zn (ppm) | 35.815 | 3.782 | 24.447 | 44.965 |