| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.178 | 1.113 | 3.572 | 7.401 |
| Arsenic | As (ppm) | 7.922 | 1.485 | 5.434 | 11.988 |
| Calcium | Ca (wt%) | 0.432 | 0.130 | 0.185 | 0.640 |
| Copper | Cu (ppm) | 17.375 | 5.927 | 8.710 | 31.111 |
| Iron | Fe (wt%) | 2.019 | 0.658 | 1.192 | 3.416 |
| Mercury | Hg (ppm) | 0.041 | 0.007 | 0.026 | 0.061 |
| Magnesium | Mg (wt%) | 0.423 | 0.192 | 0.172 | 0.863 |
| Manganese | Mn (ppm) | 731.739 | 124.315 | 499.266 | 1118.970 |
| Sodium | Na (wt%) | 0.758 | 0.103 | 0.508 | 1.011 |
| Phosphorus | P (wt%) | 0.058 | 0.016 | 0.030 | 0.094 |
| Lead | Pb (ppm) | 19.077 | 3.561 | 13.008 | 26.781 |
| Selenium | Se (ppm) | 0.348 | 0.137 | 0.101 | 0.639 |
| Titanium | Ti (wt%) | 0.305 | 0.020 | 0.258 | 0.364 |
| Zinc | Zn (ppm) | 68.828 | 23.415 | 34.064 | 105.162 |