| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.121 | 0.699 | 0.938 | 5.170 |
| Arsenic | As (ppm) | 5.241 | 2.133 | 1.909 | 16.913 |
| Calcium | Ca (wt%) | 0.212 | 0.163 | 0.045 | 0.917 |
| Copper | Cu (ppm) | 8.174 | 1.765 | 3.441 | 13.390 |
| Iron | Fe (wt%) | 1.278 | 0.402 | 0.582 | 3.466 |
| Mercury | Hg (ppm) | 0.058 | 0.034 | 0.010 | 0.191 |
| Magnesium | Mg (wt%) | 0.132 | 0.053 | 0.045 | 0.399 |
| Manganese | Mn (ppm) | 426.524 | 169.427 | 54.524 | 1054.230 |
| Sodium | Na (wt%) | 0.038 | 0.008 | 0.016 | 0.056 |
| Phosphorus | P (wt%) | 0.025 | 0.007 | 0.010 | 0.054 |
| Lead | Pb (ppm) | 22.149 | 7.737 | 6.963 | 40.081 |
| Selenium | Se (ppm) | 0.270 | 0.071 | 0.111 | 0.586 |
| Titanium | Ti (wt%) | 0.248 | 0.053 | 0.100 | 0.371 |
| Zinc | Zn (ppm) | 52.869 | 22.031 | 11.321 | 133.617 |