| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.269 | 0.597 | 2.609 | 5.706 |
| Arsenic | As (ppm) | 4.832 | 1.194 | 3.028 | 8.280 |
| Calcium | Ca (wt%) | 1.526 | 1.233 | 0.273 | 8.028 |
| Copper | Cu (ppm) | 12.532 | 2.640 | 5.878 | 19.901 |
| Iron | Fe (wt%) | 1.773 | 0.184 | 1.150 | 2.409 |
| Mercury | Hg (ppm) | 0.159 | 0.118 | 0.010 | 0.686 |
| Magnesium | Mg (wt%) | 0.396 | 0.071 | 0.219 | 0.602 |
| Manganese | Mn (ppm) | 210.506 | 29.824 | 121.255 | 298.710 |
| Sodium | Na (wt%) | 0.335 | 0.079 | 0.151 | 0.542 |
| Phosphorus | P (wt%) | 0.037 | 0.008 | 0.020 | 0.070 |
| Lead | Pb (ppm) | 16.396 | 2.191 | 10.794 | 23.905 |
| Selenium | Se (ppm) | 0.302 | 0.123 | 0.102 | 0.595 |
| Titanium | Ti (wt%) | 0.281 | 0.038 | 0.188 | 0.336 |
| Zinc | Zn (ppm) | 50.583 | 6.908 | 35.247 | 78.092 |