| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.794 | 0.953 | 1.327 | 9.646 |
| Arsenic | As (ppm) | 5.598 | 2.055 | 1.573 | 16.614 |
| Calcium | Ca (wt%) | 0.586 | 0.320 | 0.072 | 2.478 |
| Copper | Cu (ppm) | 24.611 | 8.242 | 10.067 | 69.337 |
| Iron | Fe (wt%) | 4.240 | 0.942 | 0.920 | 9.059 |
| Mercury | Hg (ppm) | 0.045 | 0.015 | 0.011 | 0.138 |
| Magnesium | Mg (wt%) | 0.768 | 0.466 | 0.113 | 6.199 |
| Manganese | Mn (ppm) | 681.382 | 229.970 | 233.315 | 1533.740 |
| Sodium | Na (wt%) | 0.634 | 0.177 | 0.143 | 1.349 |
| Phosphorus | P (wt%) | 0.063 | 0.017 | 0.020 | 0.176 |
| Lead | Pb (ppm) | 24.771 | 8.083 | 9.541 | 108.034 |
| Selenium | Se (ppm) | 0.569 | 0.095 | 0.114 | 0.875 |
| Titanium | Ti (wt%) | 0.499 | 0.124 | 0.125 | 1.034 |
| Zinc | Zn (ppm) | 85.404 | 14.514 | 28.348 | 147.038 |