| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.814 | 0.254 | 0.358 | 1.706 |
| Arsenic | As (ppm) | 2.496 | 0.506 | 1.087 | 3.326 |
| Calcium | Ca (wt%) | 0.017 | 0.004 | 0.003 | 0.028 |
| Copper | Cu (ppm) | 3.808 | 1.038 | 1.087 | 6.038 |
| Iron | Fe (wt%) | 0.832 | 0.195 | 0.301 | 1.372 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.023 |
| Magnesium | Mg (wt%) | 0.018 | 0.004 | 0.009 | 0.031 |
| Manganese | Mn (ppm) | 129.388 | 24.391 | 44.530 | 174.026 |
| Sodium | Na (wt%) | 0.006 | 0.003 | 0.003 | 0.019 |
| Phosphorus | P (wt%) | 0.019 | 0.004 | 0.009 | 0.030 |
| Lead | Pb (ppm) | 15.000 | 4.429 | 6.136 | 28.201 |
| Selenium | Se (ppm) | 0.126 | 0.019 | 0.101 | 0.204 |
| Titanium | Ti (wt%) | 0.541 | 0.116 | 0.134 | 0.706 |
| Zinc | Zn (ppm) | 16.536 | 5.831 | 6.283 | 35.753 |