| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.461 | 1.109 | 2.395 | 8.157 |
| Arsenic | As (ppm) | 4.407 | 0.651 | 2.872 | 6.332 |
| Calcium | Ca (wt%) | 0.477 | 0.412 | 0.174 | 2.198 |
| Copper | Cu (ppm) | 10.170 | 4.533 | 6.110 | 28.882 |
| Iron | Fe (wt%) | 1.429 | 0.423 | 0.951 | 3.221 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.296 | 0.127 | 0.180 | 0.831 |
| Manganese | Mn (ppm) | 250.005 | 175.734 | 123.420 | 988.116 |
| Sodium | Na (wt%) | 0.515 | 0.474 | 0.202 | 2.492 |
| Phosphorus | P (wt%) | 0.031 | 0.024 | 0.013 | 0.130 |
| Lead | Pb (ppm) | 10.073 | 1.179 | 8.000 | 13.866 |
| Selenium | Se (ppm) | 0.120 | 0.034 | 0.100 | 0.290 |
| Titanium | Ti (wt%) | 0.222 | 0.052 | 0.151 | 0.446 |
| Zinc | Zn (ppm) | 39.495 | 14.037 | 26.608 | 99.359 |