| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.103 | 0.457 | 1.799 | 4.419 |
| Arsenic | As (ppm) | 6.843 | 1.854 | 2.746 | 12.052 |
| Calcium | Ca (wt%) | 0.252 | 0.048 | 0.130 | 0.375 |
| Copper | Cu (ppm) | 4.468 | 1.077 | 2.131 | 6.987 |
| Iron | Fe (wt%) | 1.567 | 0.536 | 0.889 | 3.552 |
| Mercury | Hg (ppm) | 0.024 | 0.004 | 0.018 | 0.040 |
| Magnesium | Mg (wt%) | 0.157 | 0.026 | 0.105 | 0.254 |
| Manganese | Mn (ppm) | 246.042 | 62.128 | 147.547 | 526.471 |
| Sodium | Na (wt%) | 0.379 | 0.122 | 0.087 | 0.626 |
| Phosphorus | P (wt%) | 0.019 | 0.004 | 0.008 | 0.025 |
| Lead | Pb (ppm) | 14.169 | 2.744 | 8.350 | 21.953 |
| Selenium | Se (ppm) | 0.263 | 0.072 | 0.113 | 0.499 |
| Titanium | Ti (wt%) | 0.306 | 0.050 | 0.215 | 0.415 |
| Zinc | Zn (ppm) | 29.245 | 5.178 | 18.770 | 38.931 |