| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.455 | 0.457 | 1.935 | 4.717 |
| Arsenic | As (ppm) | 5.797 | 1.693 | 2.664 | 11.357 |
| Calcium | Ca (wt%) | 3.622 | 2.671 | 0.172 | 11.327 |
| Copper | Cu (ppm) | 6.710 | 2.816 | 1.308 | 17.509 |
| Iron | Fe (wt%) | 1.267 | 0.280 | 0.555 | 1.976 |
| Mercury | Hg (ppm) | 0.022 | 0.010 | 0.011 | 0.077 |
| Magnesium | Mg (wt%) | 0.274 | 0.078 | 0.087 | 0.413 |
| Manganese | Mn (ppm) | 342.532 | 175.785 | 67.778 | 1049.890 |
| Sodium | Na (wt%) | 0.448 | 0.164 | 0.144 | 0.960 |
| Phosphorus | P (wt%) | 0.018 | 0.007 | 0.005 | 0.038 |
| Lead | Pb (ppm) | 14.713 | 3.880 | 6.339 | 28.605 |
| Selenium | Se (ppm) | 0.236 | 0.056 | 0.111 | 0.470 |
| Titanium | Ti (wt%) | 0.275 | 0.042 | 0.148 | 0.430 |
| Zinc | Zn (ppm) | 29.901 | 6.035 | 10.342 | 45.327 |