| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.506 | 0.256 | 0.741 | 2.325 |
| Arsenic | As (ppm) | 3.449 | 1.104 | 1.636 | 9.689 |
| Calcium | Ca (wt%) | 0.053 | 0.009 | 0.027 | 0.095 |
| Copper | Cu (ppm) | 5.761 | 3.647 | 1.263 | 25.363 |
| Iron | Fe (wt%) | 0.669 | 0.109 | 0.315 | 1.015 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.060 | 0.011 | 0.027 | 0.089 |
| Manganese | Mn (ppm) | 221.295 | 164.055 | 51.394 | 1091.830 |
| Sodium | Na (wt%) | 0.096 | 0.038 | 0.046 | 0.211 |
| Phosphorus | P (wt%) | 0.014 | 0.004 | 0.005 | 0.028 |
| Lead | Pb (ppm) | 9.886 | 1.746 | 5.045 | 14.970 |
| Selenium | Se (ppm) | 0.219 | 0.058 | 0.102 | 0.383 |
| Titanium | Ti (wt%) | 0.251 | 0.028 | 0.184 | 0.321 |
| Zinc | Zn (ppm) | 15.484 | 2.666 | 8.459 | 24.974 |