| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.566 | 0.509 | 2.854 | 9.271 |
| Arsenic | As (ppm) | 8.459 | 2.712 | 2.277 | 30.521 |
| Calcium | Ca (wt%) | 2.166 | 0.778 | 0.567 | 6.591 |
| Copper | Cu (ppm) | 28.302 | 8.292 | 9.124 | 89.544 |
| Iron | Fe (wt%) | 2.437 | 0.657 | 1.532 | 7.508 |
| Mercury | Hg (ppm) | 0.037 | 0.034 | 0.010 | 0.483 |
| Magnesium | Mg (wt%) | 1.211 | 0.757 | 0.435 | 5.529 |
| Manganese | Mn (ppm) | 376.567 | 115.165 | 155.569 | 1055.560 |
| Sodium | Na (wt%) | 0.921 | 0.130 | 0.467 | 1.397 |
| Phosphorus | P (wt%) | 0.080 | 0.043 | 0.045 | 0.524 |
| Lead | Pb (ppm) | 17.767 | 3.347 | 9.223 | 30.708 |
| Selenium | Se (ppm) | 0.704 | 0.732 | 0.104 | 13.208 |
| Titanium | Ti (wt%) | 0.258 | 0.037 | 0.164 | 0.539 |
| Zinc | Zn (ppm) | 77.782 | 15.489 | 42.533 | 212.476 |