| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.229 | 0.829 | 1.676 | 6.359 |
| Arsenic | As (ppm) | 6.100 | 1.530 | 3.034 | 13.994 |
| Calcium | Ca (wt%) | 3.508 | 0.772 | 1.532 | 5.310 |
| Copper | Cu (ppm) | 16.207 | 3.340 | 6.231 | 24.769 |
| Iron | Fe (wt%) | 1.951 | 0.353 | 1.184 | 3.087 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.920 | 0.476 | 0.291 | 2.835 |
| Manganese | Mn (ppm) | 557.171 | 127.526 | 234.474 | 855.157 |
| Sodium | Na (wt%) | 0.833 | 0.161 | 0.280 | 1.169 |
| Phosphorus | P (wt%) | 0.043 | 0.008 | 0.020 | 0.056 |
| Lead | Pb (ppm) | 22.605 | 5.024 | 8.515 | 35.796 |
| Selenium | Se (ppm) | 0.127 | 0.043 | 0.100 | 0.391 |
| Titanium | Ti (wt%) | 0.276 | 0.047 | 0.197 | 0.435 |
| Zinc | Zn (ppm) | 35.629 | 8.409 | 16.808 | 69.055 |