| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.336 | 0.929 | 3.038 | 6.811 |
| Arsenic | As (ppm) | 9.625 | 2.215 | 4.119 | 15.739 |
| Calcium | Ca (wt%) | 0.475 | 0.094 | 0.269 | 0.752 |
| Copper | Cu (ppm) | 12.825 | 3.086 | 5.591 | 18.433 |
| Iron | Fe (wt%) | 2.236 | 0.547 | 1.000 | 3.267 |
| Mercury | Hg (ppm) | 0.031 | 0.009 | 0.011 | 0.065 |
| Magnesium | Mg (wt%) | 0.471 | 0.133 | 0.163 | 0.750 |
| Manganese | Mn (ppm) | 721.828 | 240.225 | 320.675 | 1878.460 |
| Sodium | Na (wt%) | 0.606 | 0.110 | 0.307 | 0.941 |
| Phosphorus | P (wt%) | 0.060 | 0.013 | 0.034 | 0.110 |
| Lead | Pb (ppm) | 19.376 | 4.312 | 10.296 | 35.251 |
| Selenium | Se (ppm) | 0.590 | 0.180 | 0.242 | 1.044 |
| Titanium | Ti (wt%) | 0.313 | 0.024 | 0.255 | 0.398 |
| Zinc | Zn (ppm) | 69.640 | 19.487 | 32.289 | 143.621 |