| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.287 | 0.712 | 2.031 | 5.130 |
| Arsenic | As (ppm) | 5.831 | 2.145 | 2.089 | 18.546 |
| Calcium | Ca (wt%) | 2.370 | 2.228 | 0.237 | 10.051 |
| Copper | Cu (ppm) | 7.883 | 2.071 | 4.071 | 17.767 |
| Iron | Fe (wt%) | 1.529 | 0.416 | 0.780 | 2.632 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.294 | 0.142 | 0.083 | 0.586 |
| Manganese | Mn (ppm) | 293.070 | 136.453 | 148.613 | 1108.330 |
| Sodium | Na (wt%) | 0.310 | 0.060 | 0.136 | 0.461 |
| Phosphorus | P (wt%) | 0.029 | 0.011 | 0.011 | 0.076 |
| Lead | Pb (ppm) | 15.635 | 4.331 | 2.447 | 30.518 |
| Selenium | Se (ppm) | 0.242 | 0.088 | 0.118 | 0.607 |
| Titanium | Ti (wt%) | 0.283 | 0.032 | 0.206 | 0.381 |
| Zinc | Zn (ppm) | 35.628 | 8.731 | 20.496 | 61.003 |