| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.518 | 0.657 | 6.426 | 9.712 |
| Arsenic | As (ppm) | 6.972 | 1.565 | 2.440 | 14.755 |
| Calcium | Ca (wt%) | 1.095 | 0.422 | 0.171 | 2.306 |
| Copper | Cu (ppm) | 36.679 | 12.717 | 10.457 | 120.404 |
| Iron | Fe (wt%) | 4.193 | 0.608 | 2.369 | 6.608 |
| Mercury | Hg (ppm) | 0.080 | 0.053 | 0.010 | 0.270 |
| Magnesium | Mg (wt%) | 1.149 | 0.258 | 0.581 | 1.998 |
| Manganese | Mn (ppm) | 709.284 | 170.026 | 307.736 | 1206.010 |
| Sodium | Na (wt%) | 1.815 | 0.238 | 1.056 | 2.459 |
| Phosphorus | P (wt%) | 0.082 | 0.026 | 0.044 | 0.191 |
| Lead | Pb (ppm) | 6.755 | 2.207 | 2.021 | 16.736 |
| Selenium | Se (ppm) | 0.504 | 0.443 | 0.100 | 1.900 |
| Titanium | Ti (wt%) | 0.483 | 0.078 | 0.355 | 1.012 |
| Zinc | Zn (ppm) | 79.936 | 14.407 | 49.142 | 130.295 |