| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.248 | 0.686 | 0.228 | 3.975 |
| Arsenic | As (ppm) | 2.820 | 0.858 | 1.239 | 5.606 |
| Calcium | Ca (wt%) | 0.060 | 0.032 | 0.013 | 0.197 |
| Copper | Cu (ppm) | 3.067 | 1.322 | 1.046 | 7.854 |
| Iron | Fe (wt%) | 0.891 | 0.396 | 0.312 | 2.505 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.036 |
| Magnesium | Mg (wt%) | 0.061 | 0.036 | 0.011 | 0.194 |
| Manganese | Mn (ppm) | 319.836 | 133.066 | 118.907 | 997.509 |
| Sodium | Na (wt%) | 0.110 | 0.065 | 0.014 | 0.381 |
| Phosphorus | P (wt%) | 0.015 | 0.005 | 0.007 | 0.033 |
| Lead | Pb (ppm) | 14.259 | 2.545 | 7.174 | 20.435 |
| Selenium | Se (ppm) | 0.127 | 0.026 | 0.100 | 0.198 |
| Titanium | Ti (wt%) | 0.372 | 0.066 | 0.154 | 0.570 |
| Zinc | Zn (ppm) | 16.073 | 6.772 | 4.551 | 37.420 |