| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.513 | 0.520 | 6.129 | 9.709 |
| Arsenic | As (ppm) | 7.392 | 3.245 | 3.669 | 20.852 |
| Calcium | Ca (wt%) | 1.437 | 0.230 | 0.832 | 2.121 |
| Copper | Cu (ppm) | 35.123 | 7.529 | 24.580 | 65.364 |
| Iron | Fe (wt%) | 3.548 | 0.469 | 2.870 | 5.646 |
| Mercury | Hg (ppm) | 0.087 | 0.024 | 0.013 | 0.149 |
| Magnesium | Mg (wt%) | 0.881 | 0.108 | 0.615 | 1.165 |
| Manganese | Mn (ppm) | 1189.780 | 242.079 | 712.955 | 2316.270 |
| Sodium | Na (wt%) | 1.512 | 0.245 | 0.817 | 2.144 |
| Phosphorus | P (wt%) | 0.226 | 0.105 | 0.050 | 0.664 |
| Lead | Pb (ppm) | 11.753 | 3.780 | 2.437 | 23.868 |
| Selenium | Se (ppm) | 0.514 | 0.206 | 0.106 | 1.291 |
| Titanium | Ti (wt%) | 0.463 | 0.096 | 0.332 | 0.881 |
| Zinc | Zn (ppm) | 76.219 | 8.391 | 51.037 | 108.866 |