| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.462 | 0.133 | 0.122 | 1.001 |
| Arsenic | As (ppm) | 1.940 | 0.582 | 0.709 | 5.570 |
| Calcium | Ca (wt%) | 0.055 | 0.071 | 0.003 | 0.605 |
| Copper | Cu (ppm) | 3.625 | 1.925 | 1.037 | 16.055 |
| Iron | Fe (wt%) | 0.472 | 0.124 | 0.192 | 1.166 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.028 | 0.009 | 0.010 | 0.074 |
| Manganese | Mn (ppm) | 147.142 | 45.572 | 77.391 | 486.573 |
| Sodium | Na (wt%) | 0.014 | 0.008 | 0.003 | 0.053 |
| Phosphorus | P (wt%) | 0.007 | 0.002 | 0.003 | 0.015 |
| Lead | Pb (ppm) | 13.194 | 2.698 | 5.922 | 26.438 |
| Selenium | Se (ppm) | 0.108 | 0.014 | 0.100 | 0.241 |
| Titanium | Ti (wt%) | 0.416 | 0.060 | 0.218 | 0.678 |
| Zinc | Zn (ppm) | 9.467 | 3.042 | 3.015 | 21.350 |