| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.803 | 0.799 | 4.022 | 9.461 |
| Arsenic | As (ppm) | 10.577 | 1.569 | 5.692 | 15.675 |
| Calcium | Ca (wt%) | 0.457 | 0.058 | 0.289 | 0.677 |
| Copper | Cu (ppm) | 15.005 | 3.309 | 7.204 | 26.280 |
| Iron | Fe (wt%) | 2.451 | 0.581 | 1.190 | 4.520 |
| Mercury | Hg (ppm) | 0.036 | 0.012 | 0.010 | 0.075 |
| Magnesium | Mg (wt%) | 0.550 | 0.128 | 0.252 | 0.985 |
| Manganese | Mn (ppm) | 506.243 | 136.215 | 216.868 | 1121.620 |
| Sodium | Na (wt%) | 0.598 | 0.093 | 0.200 | 0.802 |
| Phosphorus | P (wt%) | 0.057 | 0.015 | 0.026 | 0.124 |
| Lead | Pb (ppm) | 21.407 | 4.915 | 11.100 | 46.085 |
| Selenium | Se (ppm) | 0.694 | 0.274 | 0.217 | 1.759 |
| Titanium | Ti (wt%) | 0.326 | 0.025 | 0.248 | 0.401 |
| Zinc | Zn (ppm) | 73.278 | 21.467 | 32.121 | 166.308 |