| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.329 | 0.582 | 4.203 | 6.810 |
| Arsenic | As (ppm) | 10.489 | 3.057 | 1.382 | 21.714 |
| Calcium | Ca (wt%) | 0.713 | 0.469 | 0.224 | 2.640 |
| Copper | Cu (ppm) | 15.601 | 3.208 | 9.898 | 23.882 |
| Iron | Fe (wt%) | 2.324 | 0.719 | 1.281 | 5.347 |
| Mercury | Hg (ppm) | 0.025 | 0.008 | 0.010 | 0.065 |
| Magnesium | Mg (wt%) | 1.146 | 1.012 | 0.328 | 5.803 |
| Manganese | Mn (ppm) | 528.975 | 141.710 | 256.378 | 1032.840 |
| Sodium | Na (wt%) | 0.889 | 0.144 | 0.608 | 1.469 |
| Phosphorus | P (wt%) | 0.054 | 0.010 | 0.036 | 0.094 |
| Lead | Pb (ppm) | 18.417 | 4.745 | 7.186 | 39.787 |
| Selenium | Se (ppm) | 0.234 | 0.089 | 0.100 | 0.574 |
| Titanium | Ti (wt%) | 0.342 | 0.057 | 0.264 | 0.602 |
| Zinc | Zn (ppm) | 63.134 | 16.905 | 37.027 | 145.374 |