| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.984 | 0.465 | 2.762 | 5.735 |
| Arsenic | As (ppm) | 9.433 | 1.941 | 5.319 | 17.639 |
| Calcium | Ca (wt%) | 0.216 | 0.059 | 0.088 | 0.618 |
| Copper | Cu (ppm) | 12.204 | 2.179 | 8.149 | 19.398 |
| Iron | Fe (wt%) | 2.421 | 0.306 | 1.601 | 3.656 |
| Mercury | Hg (ppm) | 0.027 | 0.007 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.393 | 0.070 | 0.172 | 0.659 |
| Manganese | Mn (ppm) | 579.575 | 134.645 | 248.552 | 1005.850 |
| Sodium | Na (wt%) | 0.441 | 0.107 | 0.119 | 0.618 |
| Phosphorus | P (wt%) | 0.049 | 0.010 | 0.021 | 0.078 |
| Lead | Pb (ppm) | 22.596 | 4.092 | 13.954 | 41.377 |
| Selenium | Se (ppm) | 0.145 | 0.044 | 0.100 | 0.388 |
| Titanium | Ti (wt%) | 0.282 | 0.027 | 0.194 | 0.371 |
| Zinc | Zn (ppm) | 66.303 | 12.685 | 42.914 | 130.709 |