| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.479 | 1.403 | 0.350 | 6.469 |
| Arsenic | As (ppm) | 3.907 | 1.656 | 1.744 | 8.312 |
| Calcium | Ca (wt%) | 0.207 | 0.321 | 0.012 | 2.707 |
| Copper | Cu (ppm) | 7.830 | 4.497 | 1.145 | 20.706 |
| Iron | Fe (wt%) | 1.084 | 0.654 | 0.227 | 2.809 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.262 | 0.230 | 0.016 | 0.930 |
| Manganese | Mn (ppm) | 195.824 | 125.540 | 46.849 | 708.830 |
| Sodium | Na (wt%) | 0.232 | 0.126 | 0.014 | 0.658 |
| Phosphorus | P (wt%) | 0.022 | 0.012 | 0.005 | 0.052 |
| Lead | Pb (ppm) | 10.622 | 4.172 | 5.051 | 21.384 |
| Selenium | Se (ppm) | 0.244 | 0.094 | 0.103 | 0.495 |
| Titanium | Ti (wt%) | 0.242 | 0.045 | 0.113 | 0.319 |
| Zinc | Zn (ppm) | 24.582 | 14.009 | 6.386 | 64.174 |