| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.099 | 0.454 | 0.490 | 3.271 |
| Arsenic | As (ppm) | 2.798 | 0.672 | 0.655 | 4.944 |
| Calcium | Ca (wt%) | 0.326 | 0.193 | 0.124 | 0.932 |
| Copper | Cu (ppm) | 7.314 | 4.582 | 1.062 | 21.852 |
| Iron | Fe (wt%) | 1.038 | 0.157 | 0.668 | 1.445 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.190 | 0.052 | 0.063 | 0.330 |
| Manganese | Mn (ppm) | 313.327 | 84.989 | 136.777 | 562.969 |
| Sodium | Na (wt%) | 0.239 | 0.072 | 0.013 | 0.492 |
| Phosphorus | P (wt%) | 0.014 | 0.002 | 0.005 | 0.021 |
| Lead | Pb (ppm) | 13.218 | 2.092 | 9.222 | 19.905 |
| Selenium | Se (ppm) | 0.110 | 0.027 | 0.100 | 0.300 |
| Titanium | Ti (wt%) | 0.267 | 0.124 | 0.158 | 0.808 |
| Zinc | Zn (ppm) | 26.186 | 2.867 | 17.988 | 35.776 |