| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.266 | 0.344 | 1.242 | 2.982 |
| Arsenic | As (ppm) | 4.028 | 0.634 | 2.621 | 6.107 |
| Calcium | Ca (wt%) | 13.409 | 3.812 | 3.579 | 20.794 |
| Copper | Cu (ppm) | 9.373 | 2.065 | 4.261 | 14.855 |
| Iron | Fe (wt%) | 1.035 | 0.159 | 0.638 | 1.374 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.947 | 0.176 | 0.433 | 1.492 |
| Manganese | Mn (ppm) | 280.626 | 40.805 | 171.991 | 449.262 |
| Sodium | Na (wt%) | 0.089 | 0.014 | 0.055 | 0.129 |
| Phosphorus | P (wt%) | 0.030 | 0.009 | 0.015 | 0.058 |
| Lead | Pb (ppm) | 14.475 | 4.912 | 7.017 | 27.966 |
| Selenium | Se (ppm) | 0.289 | 0.125 | 0.105 | 0.722 |
| Titanium | Ti (wt%) | 0.137 | 0.029 | 0.070 | 0.198 |
| Zinc | Zn (ppm) | 28.176 | 8.852 | 9.944 | 52.126 |