| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.665 | 0.502 | 6.189 | 9.031 |
| Arsenic | As (ppm) | 11.393 | 6.092 | 1.600 | 41.487 |
| Calcium | Ca (wt%) | 2.073 | 0.548 | 0.632 | 3.814 |
| Copper | Cu (ppm) | 31.352 | 13.297 | 7.098 | 91.129 |
| Iron | Fe (wt%) | 4.117 | 0.759 | 2.349 | 6.353 |
| Mercury | Hg (ppm) | 0.078 | 0.045 | 0.010 | 0.259 |
| Magnesium | Mg (wt%) | 1.401 | 0.423 | 0.647 | 2.343 |
| Manganese | Mn (ppm) | 873.488 | 261.011 | 303.747 | 1760.670 |
| Sodium | Na (wt%) | 2.075 | 0.351 | 0.815 | 3.220 |
| Phosphorus | P (wt%) | 0.087 | 0.021 | 0.026 | 0.183 |
| Lead | Pb (ppm) | 9.328 | 3.733 | 2.000 | 27.590 |
| Selenium | Se (ppm) | 0.330 | 0.232 | 0.100 | 1.394 |
| Titanium | Ti (wt%) | 0.470 | 0.078 | 0.208 | 0.762 |
| Zinc | Zn (ppm) | 82.719 | 14.084 | 46.594 | 143.942 |