| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.970 | 1.225 | 0.640 | 6.126 |
| Arsenic | As (ppm) | 10.048 | 3.793 | 1.698 | 22.971 |
| Calcium | Ca (wt%) | 0.914 | 0.681 | 0.058 | 4.459 |
| Copper | Cu (ppm) | 6.766 | 2.708 | 1.309 | 16.709 |
| Iron | Fe (wt%) | 2.505 | 0.727 | 0.994 | 4.917 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.190 | 0.079 | 0.032 | 0.508 |
| Manganese | Mn (ppm) | 793.780 | 414.815 | 285.167 | 3139.560 |
| Sodium | Na (wt%) | 0.115 | 0.036 | 0.021 | 0.240 |
| Phosphorus | P (wt%) | 0.050 | 0.016 | 0.009 | 0.088 |
| Lead | Pb (ppm) | 27.112 | 6.197 | 9.073 | 52.204 |
| Selenium | Se (ppm) | 0.373 | 0.165 | 0.113 | 1.153 |
| Titanium | Ti (wt%) | 0.475 | 0.072 | 0.153 | 0.589 |
| Zinc | Zn (ppm) | 42.637 | 13.604 | 14.116 | 78.971 |