| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.668 | 0.643 | 6.648 | 9.248 |
| Arsenic | As (ppm) | 4.203 | 0.730 | 2.094 | 5.604 |
| Calcium | Ca (wt%) | 1.962 | 0.297 | 1.352 | 2.961 |
| Copper | Cu (ppm) | 21.196 | 1.794 | 14.477 | 24.927 |
| Iron | Fe (wt%) | 4.528 | 0.797 | 3.281 | 7.312 |
| Mercury | Hg (ppm) | 0.024 | 0.019 | 0.010 | 0.079 |
| Magnesium | Mg (wt%) | 0.921 | 0.160 | 0.543 | 1.341 |
| Manganese | Mn (ppm) | 762.232 | 119.520 | 459.992 | 1191.130 |
| Sodium | Na (wt%) | 1.874 | 0.209 | 1.599 | 2.460 |
| Phosphorus | P (wt%) | 0.127 | 0.030 | 0.089 | 0.187 |
| Lead | Pb (ppm) | 12.583 | 2.076 | 8.173 | 21.762 |
| Selenium | Se (ppm) | 0.113 | 0.023 | 0.100 | 0.198 |
| Titanium | Ti (wt%) | 0.682 | 0.159 | 0.459 | 1.200 |
| Zinc | Zn (ppm) | 89.781 | 17.653 | 70.503 | 149.346 |