| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.629 | 0.514 | 4.488 | 6.832 |
| Arsenic | As (ppm) | 13.474 | 2.524 | 6.074 | 22.050 |
| Calcium | Ca (wt%) | 0.682 | 0.175 | 0.333 | 2.017 |
| Copper | Cu (ppm) | 15.459 | 3.644 | 8.538 | 28.471 |
| Iron | Fe (wt%) | 2.220 | 0.457 | 1.379 | 4.425 |
| Mercury | Hg (ppm) | 0.029 | 0.009 | 0.010 | 0.066 |
| Magnesium | Mg (wt%) | 0.645 | 0.381 | 0.327 | 4.187 |
| Manganese | Mn (ppm) | 444.574 | 133.101 | 235.986 | 893.617 |
| Sodium | Na (wt%) | 0.785 | 0.104 | 0.432 | 1.239 |
| Phosphorus | P (wt%) | 0.063 | 0.010 | 0.031 | 0.095 |
| Lead | Pb (ppm) | 21.739 | 4.631 | 12.600 | 40.210 |
| Selenium | Se (ppm) | 0.438 | 0.110 | 0.144 | 0.815 |
| Titanium | Ti (wt%) | 0.322 | 0.029 | 0.253 | 0.515 |
| Zinc | Zn (ppm) | 73.201 | 16.826 | 42.895 | 147.679 |