| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.908 | 0.533 | 6.712 | 10.697 |
| Arsenic | As (ppm) | 8.305 | 2.967 | 1.618 | 20.763 |
| Calcium | Ca (wt%) | 2.240 | 0.543 | 1.102 | 3.701 |
| Copper | Cu (ppm) | 28.590 | 8.488 | 9.499 | 68.721 |
| Iron | Fe (wt%) | 4.128 | 0.800 | 2.488 | 7.069 |
| Mercury | Hg (ppm) | 0.073 | 0.048 | 0.010 | 0.365 |
| Magnesium | Mg (wt%) | 1.472 | 0.456 | 0.553 | 4.140 |
| Manganese | Mn (ppm) | 734.473 | 86.018 | 468.739 | 991.274 |
| Sodium | Na (wt%) | 2.279 | 0.340 | 1.133 | 3.070 |
| Phosphorus | P (wt%) | 0.104 | 0.027 | 0.053 | 0.240 |
| Lead | Pb (ppm) | 13.080 | 6.586 | 2.610 | 43.408 |
| Selenium | Se (ppm) | 0.294 | 0.208 | 0.100 | 1.474 |
| Titanium | Ti (wt%) | 0.501 | 0.105 | 0.321 | 1.023 |
| Zinc | Zn (ppm) | 95.834 | 21.170 | 52.243 | 169.486 |