| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.866 | 0.293 | 0.260 | 1.819 |
| Arsenic | As (ppm) | 1.246 | 0.325 | 0.580 | 2.701 |
| Calcium | Ca (wt%) | 0.039 | 0.027 | 0.007 | 0.212 |
| Copper | Cu (ppm) | 1.991 | 0.894 | 1.030 | 6.321 |
| Iron | Fe (wt%) | 0.413 | 0.139 | 0.087 | 0.891 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.021 |
| Magnesium | Mg (wt%) | 0.018 | 0.009 | 0.003 | 0.069 |
| Manganese | Mn (ppm) | 58.735 | 27.166 | 12.200 | 192.642 |
| Sodium | Na (wt%) | 0.027 | 0.031 | 0.003 | 0.241 |
| Phosphorus | P (wt%) | 0.012 | 0.004 | 0.003 | 0.022 |
| Lead | Pb (ppm) | 13.056 | 3.509 | 2.952 | 23.358 |
| Selenium | Se (ppm) | 0.156 | 0.030 | 0.104 | 0.266 |
| Titanium | Ti (wt%) | 0.329 | 0.071 | 0.115 | 0.532 |
| Zinc | Zn (ppm) | 6.941 | 2.923 | 1.296 | 15.371 |