| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.470 | 1.118 | 5.782 | 11.533 |
| Arsenic | As (ppm) | 3.469 | 1.187 | 1.208 | 8.337 |
| Calcium | Ca (wt%) | 2.291 | 0.432 | 1.122 | 4.763 |
| Copper | Cu (ppm) | 32.530 | 12.202 | 15.523 | 87.267 |
| Iron | Fe (wt%) | 5.354 | 1.265 | 2.852 | 11.598 |
| Mercury | Hg (ppm) | 0.078 | 0.228 | 0.010 | 2.196 |
| Magnesium | Mg (wt%) | 0.961 | 0.243 | 0.563 | 2.150 |
| Manganese | Mn (ppm) | 809.205 | 136.022 | 457.023 | 1209.140 |
| Sodium | Na (wt%) | 1.862 | 0.237 | 0.850 | 2.665 |
| Phosphorus | P (wt%) | 0.094 | 0.020 | 0.051 | 0.174 |
| Lead | Pb (ppm) | 9.307 | 2.061 | 2.975 | 18.732 |
| Selenium | Se (ppm) | 0.132 | 0.045 | 0.100 | 0.354 |
| Titanium | Ti (wt%) | 0.808 | 0.207 | 0.506 | 1.538 |
| Zinc | Zn (ppm) | 93.174 | 16.451 | 57.043 | 151.861 |