| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.755 | 0.486 | 1.672 | 3.828 |
| Arsenic | As (ppm) | 5.893 | 2.275 | 2.365 | 14.133 |
| Calcium | Ca (wt%) | 17.389 | 2.615 | 11.286 | 26.244 |
| Copper | Cu (ppm) | 14.340 | 2.838 | 8.587 | 19.855 |
| Iron | Fe (wt%) | 1.313 | 0.278 | 0.784 | 2.043 |
| Mercury | Hg (ppm) | 0.014 | 0.006 | 0.010 | 0.045 |
| Magnesium | Mg (wt%) | 0.511 | 0.112 | 0.384 | 0.887 |
| Manganese | Mn (ppm) | 400.652 | 157.720 | 184.237 | 1049.220 |
| Sodium | Na (wt%) | 0.075 | 0.010 | 0.051 | 0.098 |
| Phosphorus | P (wt%) | 0.028 | 0.009 | 0.012 | 0.060 |
| Lead | Pb (ppm) | 22.725 | 6.125 | 10.813 | 49.628 |
| Selenium | Se (ppm) | 0.240 | 0.065 | 0.102 | 0.398 |
| Titanium | Ti (wt%) | 0.154 | 0.029 | 0.100 | 0.221 |
| Zinc | Zn (ppm) | 25.757 | 6.872 | 14.599 | 44.312 |