| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.485 | 0.611 | 3.193 | 6.166 |
| Arsenic | As (ppm) | 5.935 | 1.491 | 3.045 | 9.684 |
| Calcium | Ca (wt%) | 2.616 | 0.720 | 0.720 | 4.373 |
| Copper | Cu (ppm) | 13.157 | 4.086 | 6.131 | 22.811 |
| Iron | Fe (wt%) | 1.796 | 0.433 | 1.010 | 3.011 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.027 |
| Magnesium | Mg (wt%) | 0.776 | 0.679 | 0.330 | 3.028 |
| Manganese | Mn (ppm) | 500.327 | 117.106 | 312.985 | 804.351 |
| Sodium | Na (wt%) | 0.715 | 0.108 | 0.563 | 1.000 |
| Phosphorus | P (wt%) | 0.041 | 0.008 | 0.031 | 0.059 |
| Lead | Pb (ppm) | 19.053 | 6.311 | 10.093 | 31.025 |
| Selenium | Se (ppm) | 0.420 | 0.277 | 0.108 | 1.233 |
| Titanium | Ti (wt%) | 0.242 | 0.032 | 0.177 | 0.342 |
| Zinc | Zn (ppm) | 41.840 | 6.821 | 30.182 | 66.401 |