| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.534 | 0.856 | 3.940 | 6.836 |
| Arsenic | As (ppm) | 7.795 | 2.263 | 4.300 | 16.080 |
| Calcium | Ca (wt%) | 4.905 | 2.008 | 0.937 | 8.661 |
| Copper | Cu (ppm) | 14.328 | 2.549 | 9.000 | 20.000 |
| Iron | Fe (wt%) | 2.910 | 0.836 | 1.470 | 6.387 |
| Mercury | Hg (ppm) | 0.015 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 1.121 | 0.593 | 0.426 | 2.740 |
| Manganese | Mn (ppm) | 636.011 | 179.242 | 337.597 | 1180.910 |
| Sodium | Na (wt%) | 1.004 | 0.158 | 0.736 | 1.427 |
| Phosphorus | P (wt%) | 0.064 | 0.023 | 0.021 | 0.108 |
| Lead | Pb (ppm) | 25.606 | 4.970 | 15.000 | 32.865 |
| Selenium | Se (ppm) | 0.172 | 0.030 | 0.101 | 0.300 |
| Titanium | Ti (wt%) | 0.417 | 0.097 | 0.217 | 0.759 |
| Zinc | Zn (ppm) | 82.894 | 18.539 | 48.613 | 132.176 |