| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.280 | 0.497 | 2.261 | 4.821 |
| Arsenic | As (ppm) | 7.877 | 2.182 | 4.807 | 17.555 |
| Calcium | Ca (wt%) | 0.202 | 0.123 | 0.059 | 0.705 |
| Copper | Cu (ppm) | 17.403 | 3.558 | 9.505 | 26.518 |
| Iron | Fe (wt%) | 2.196 | 0.317 | 1.492 | 2.917 |
| Mercury | Hg (ppm) | 0.097 | 0.060 | 0.040 | 0.386 |
| Magnesium | Mg (wt%) | 0.303 | 0.103 | 0.173 | 0.534 |
| Manganese | Mn (ppm) | 636.795 | 236.205 | 296.341 | 1165.330 |
| Sodium | Na (wt%) | 0.137 | 0.065 | 0.072 | 0.367 |
| Phosphorus | P (wt%) | 0.026 | 0.006 | 0.014 | 0.046 |
| Lead | Pb (ppm) | 25.563 | 7.688 | 11.226 | 58.558 |
| Selenium | Se (ppm) | 0.228 | 0.073 | 0.102 | 0.394 |
| Titanium | Ti (wt%) | 0.288 | 0.022 | 0.230 | 0.348 |
| Zinc | Zn (ppm) | 58.138 | 12.357 | 33.275 | 90.676 |