| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.853 | 0.433 | 0.336 | 3.928 |
| Arsenic | As (ppm) | 2.063 | 1.298 | 0.858 | 16.860 |
| Calcium | Ca (wt%) | 0.060 | 0.042 | 0.018 | 0.405 |
| Copper | Cu (ppm) | 2.237 | 1.210 | 1.005 | 12.192 |
| Iron | Fe (wt%) | 0.688 | 0.281 | 0.319 | 3.719 |
| Mercury | Hg (ppm) | 0.018 | 0.020 | 0.010 | 0.183 |
| Magnesium | Mg (wt%) | 0.052 | 0.031 | 0.021 | 0.383 |
| Manganese | Mn (ppm) | 144.367 | 87.816 | 42.309 | 1066.670 |
| Sodium | Na (wt%) | 0.065 | 0.051 | 0.005 | 0.317 |
| Phosphorus | P (wt%) | 0.009 | 0.004 | 0.003 | 0.043 |
| Lead | Pb (ppm) | 13.154 | 3.065 | 5.139 | 39.756 |
| Selenium | Se (ppm) | 0.123 | 0.057 | 0.100 | 0.780 |
| Titanium | Ti (wt%) | 0.392 | 0.066 | 0.165 | 0.627 |
| Zinc | Zn (ppm) | 12.179 | 5.540 | 6.428 | 65.082 |