| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.315 | 0.695 | 1.198 | 5.225 |
| Arsenic | As (ppm) | 6.220 | 1.309 | 2.421 | 11.303 |
| Calcium | Ca (wt%) | 17.371 | 4.792 | 6.422 | 30.736 |
| Copper | Cu (ppm) | 21.493 | 5.769 | 12.035 | 66.301 |
| Iron | Fe (wt%) | 1.553 | 0.340 | 0.589 | 2.428 |
| Mercury | Hg (ppm) | 0.021 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.596 | 0.089 | 0.283 | 0.880 |
| Manganese | Mn (ppm) | 365.097 | 50.744 | 193.778 | 555.642 |
| Sodium | Na (wt%) | 0.104 | 0.029 | 0.037 | 0.224 |
| Phosphorus | P (wt%) | 0.043 | 0.013 | 0.015 | 0.066 |
| Lead | Pb (ppm) | 23.074 | 5.156 | 10.526 | 60.805 |
| Selenium | Se (ppm) | 0.457 | 0.119 | 0.200 | 0.850 |
| Titanium | Ti (wt%) | 0.232 | 0.074 | 0.067 | 0.447 |
| Zinc | Zn (ppm) | 43.536 | 11.005 | 13.149 | 74.021 |