| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.231 | 0.079 | 0.064 | 0.558 |
| Arsenic | As (ppm) | 1.326 | 0.463 | 0.326 | 3.103 |
| Calcium | Ca (wt%) | 0.759 | 0.622 | 0.022 | 3.321 |
| Copper | Cu (ppm) | 5.174 | 3.900 | 1.042 | 27.289 |
| Iron | Fe (wt%) | 0.130 | 0.033 | 0.031 | 0.241 |
| Mercury | Hg (ppm) | 0.017 | 0.008 | 0.010 | 0.056 |
| Magnesium | Mg (wt%) | 0.027 | 0.012 | 0.005 | 0.063 |
| Manganese | Mn (ppm) | 27.319 | 13.566 | 11.706 | 93.963 |
| Sodium | Na (wt%) | 0.021 | 0.018 | 0.003 | 0.102 |
| Phosphorus | P (wt%) | 0.061 | 0.069 | 0.006 | 0.372 |
| Lead | Pb (ppm) | 14.659 | 5.842 | 3.813 | 31.638 |
| Selenium | Se (ppm) | 0.167 | 0.073 | 0.101 | 0.570 |
| Titanium | Ti (wt%) | 0.190 | 0.038 | 0.095 | 0.290 |
| Zinc | Zn (ppm) | 18.908 | 9.262 | 3.124 | 42.508 |