| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.510 | 0.712 | 1.713 | 5.564 |
| Arsenic | As (ppm) | 2.020 | 0.687 | 0.443 | 4.556 |
| Calcium | Ca (wt%) | 0.599 | 0.272 | 0.225 | 1.582 |
| Copper | Cu (ppm) | 8.918 | 5.180 | 2.528 | 34.408 |
| Iron | Fe (wt%) | 1.349 | 0.404 | 0.471 | 3.232 |
| Mercury | Hg (ppm) | 0.051 | 0.029 | 0.012 | 0.186 |
| Magnesium | Mg (wt%) | 0.229 | 0.122 | 0.046 | 0.628 |
| Manganese | Mn (ppm) | 472.626 | 100.727 | 229.296 | 875.065 |
| Sodium | Na (wt%) | 1.074 | 0.214 | 0.490 | 1.602 |
| Phosphorus | P (wt%) | 0.027 | 0.010 | 0.007 | 0.061 |
| Lead | Pb (ppm) | 51.998 | 65.043 | 15.631 | 493.484 |
| Selenium | Se (ppm) | 0.212 | 0.104 | 0.100 | 0.725 |
| Titanium | Ti (wt%) | 0.609 | 0.113 | 0.395 | 0.948 |
| Zinc | Zn (ppm) | 29.517 | 12.775 | 9.204 | 103.593 |