| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.117 | 0.370 | 1.435 | 3.770 |
| Arsenic | As (ppm) | 2.682 | 0.851 | 1.310 | 6.728 |
| Calcium | Ca (wt%) | 4.649 | 2.082 | 0.093 | 8.699 |
| Copper | Cu (ppm) | 7.990 | 1.308 | 4.036 | 12.643 |
| Iron | Fe (wt%) | 0.826 | 0.199 | 0.453 | 1.611 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.019 |
| Magnesium | Mg (wt%) | 0.357 | 0.166 | 0.072 | 1.002 |
| Manganese | Mn (ppm) | 204.215 | 47.792 | 74.249 | 387.118 |
| Sodium | Na (wt%) | 0.108 | 0.013 | 0.079 | 0.166 |
| Phosphorus | P (wt%) | 0.020 | 0.006 | 0.008 | 0.032 |
| Lead | Pb (ppm) | 11.726 | 2.961 | 7.039 | 20.826 |
| Selenium | Se (ppm) | 0.108 | 0.015 | 0.100 | 0.200 |
| Titanium | Ti (wt%) | 0.125 | 0.017 | 0.084 | 0.182 |
| Zinc | Zn (ppm) | 24.382 | 4.630 | 13.083 | 43.288 |