| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.197 | 0.371 | 0.352 | 2.476 |
| Arsenic | As (ppm) | 2.790 | 0.799 | 1.304 | 6.947 |
| Calcium | Ca (wt%) | 0.045 | 0.032 | 0.012 | 0.210 |
| Copper | Cu (ppm) | 3.110 | 1.283 | 1.041 | 6.931 |
| Iron | Fe (wt%) | 0.889 | 0.327 | 0.453 | 3.011 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.048 | 0.018 | 0.013 | 0.123 |
| Manganese | Mn (ppm) | 152.938 | 58.320 | 61.361 | 413.816 |
| Sodium | Na (wt%) | 0.093 | 0.098 | 0.012 | 0.596 |
| Phosphorus | P (wt%) | 0.011 | 0.004 | 0.006 | 0.023 |
| Lead | Pb (ppm) | 7.533 | 2.069 | 2.324 | 14.827 |
| Selenium | Se (ppm) | 0.161 | 0.052 | 0.100 | 0.358 |
| Titanium | Ti (wt%) | 0.236 | 0.040 | 0.112 | 0.344 |
| Zinc | Zn (ppm) | 15.910 | 3.053 | 10.321 | 27.186 |