| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.605 | 0.598 | 0.550 | 4.640 |
| Arsenic | As (ppm) | 3.359 | 1.356 | 1.315 | 10.204 |
| Calcium | Ca (wt%) | 0.029 | 0.012 | 0.006 | 0.078 |
| Copper | Cu (ppm) | 3.156 | 1.069 | 1.130 | 7.409 |
| Iron | Fe (wt%) | 0.756 | 0.293 | 0.209 | 2.095 |
| Mercury | Hg (ppm) | 0.018 | 0.005 | 0.011 | 0.042 |
| Magnesium | Mg (wt%) | 0.025 | 0.008 | 0.010 | 0.066 |
| Manganese | Mn (ppm) | 67.835 | 22.423 | 16.813 | 183.495 |
| Sodium | Na (wt%) | 0.004 | 0.001 | 0.003 | 0.009 |
| Phosphorus | P (wt%) | 0.021 | 0.008 | 0.009 | 0.055 |
| Lead | Pb (ppm) | 16.288 | 4.429 | 6.747 | 27.318 |
| Selenium | Se (ppm) | 0.239 | 0.071 | 0.114 | 0.631 |
| Titanium | Ti (wt%) | 0.398 | 0.069 | 0.212 | 0.595 |
| Zinc | Zn (ppm) | 13.694 | 3.831 | 5.007 | 29.168 |