| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.652 | 0.642 | 1.476 | 5.663 |
| Arsenic | As (ppm) | 4.609 | 1.224 | 2.672 | 10.596 |
| Calcium | Ca (wt%) | 8.159 | 2.851 | 2.622 | 16.591 |
| Copper | Cu (ppm) | 9.970 | 2.057 | 6.219 | 17.606 |
| Iron | Fe (wt%) | 1.165 | 0.288 | 0.513 | 2.454 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.650 | 0.197 | 0.280 | 1.557 |
| Manganese | Mn (ppm) | 270.987 | 68.793 | 123.308 | 567.830 |
| Sodium | Na (wt%) | 0.117 | 0.043 | 0.058 | 0.347 |
| Phosphorus | P (wt%) | 0.029 | 0.006 | 0.015 | 0.055 |
| Lead | Pb (ppm) | 14.580 | 4.149 | 8.396 | 30.981 |
| Selenium | Se (ppm) | 0.239 | 0.065 | 0.107 | 0.500 |
| Titanium | Ti (wt%) | 0.140 | 0.028 | 0.089 | 0.262 |
| Zinc | Zn (ppm) | 35.414 | 10.220 | 15.887 | 66.964 |