| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.334 | 0.666 | 1.582 | 5.681 |
| Arsenic | As (ppm) | 3.342 | 0.715 | 1.511 | 5.214 |
| Calcium | Ca (wt%) | 0.263 | 0.067 | 0.117 | 0.639 |
| Copper | Cu (ppm) | 5.351 | 2.105 | 1.464 | 13.221 |
| Iron | Fe (wt%) | 3.532 | 1.328 | 0.829 | 8.715 |
| Mercury | Hg (ppm) | 0.268 | 0.198 | 0.025 | 0.889 |
| Magnesium | Mg (wt%) | 0.138 | 0.038 | 0.096 | 0.427 |
| Manganese | Mn (ppm) | 877.340 | 346.181 | 100.537 | 2070.030 |
| Sodium | Na (wt%) | 0.445 | 0.102 | 0.195 | 0.878 |
| Phosphorus | P (wt%) | 0.026 | 0.009 | 0.006 | 0.057 |
| Lead | Pb (ppm) | 37.273 | 9.060 | 8.699 | 61.675 |
| Selenium | Se (ppm) | 0.240 | 0.058 | 0.104 | 0.476 |
| Titanium | Ti (wt%) | 0.987 | 0.279 | 0.305 | 1.901 |
| Zinc | Zn (ppm) | 51.808 | 8.372 | 28.562 | 75.694 |