| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.353 | 1.517 | 4.056 | 11.711 |
| Arsenic | As (ppm) | 1.720 | 0.431 | 1.009 | 2.755 |
| Calcium | Ca (wt%) | 0.370 | 0.063 | 0.256 | 0.549 |
| Copper | Cu (ppm) | 21.594 | 7.083 | 12.229 | 47.537 |
| Iron | Fe (wt%) | 3.476 | 0.458 | 2.325 | 4.916 |
| Mercury | Hg (ppm) | 0.158 | 0.097 | 0.041 | 0.421 |
| Magnesium | Mg (wt%) | 0.441 | 0.080 | 0.267 | 0.623 |
| Manganese | Mn (ppm) | 507.290 | 58.086 | 397.962 | 777.609 |
| Sodium | Na (wt%) | 0.378 | 0.082 | 0.193 | 0.545 |
| Phosphorus | P (wt%) | 0.049 | 0.009 | 0.027 | 0.069 |
| Lead | Pb (ppm) | 28.677 | 4.718 | 18.244 | 37.764 |
| Selenium | Se (ppm) | 0.282 | 0.097 | 0.121 | 0.583 |
| Titanium | Ti (wt%) | 0.752 | 0.088 | 0.548 | 0.928 |
| Zinc | Zn (ppm) | 72.158 | 10.618 | 52.200 | 99.339 |