| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.710 | 0.434 | 1.528 | 3.855 |
| Arsenic | As (ppm) | 3.543 | 0.754 | 1.911 | 5.582 |
| Calcium | Ca (wt%) | 0.696 | 0.553 | 0.073 | 2.903 |
| Copper | Cu (ppm) | 7.171 | 1.784 | 3.196 | 13.440 |
| Iron | Fe (wt%) | 1.087 | 0.217 | 0.493 | 1.590 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.210 | 0.078 | 0.057 | 0.394 |
| Manganese | Mn (ppm) | 208.910 | 60.855 | 99.218 | 506.043 |
| Sodium | Na (wt%) | 0.290 | 0.062 | 0.155 | 0.497 |
| Phosphorus | P (wt%) | 0.020 | 0.005 | 0.008 | 0.039 |
| Lead | Pb (ppm) | 18.090 | 3.833 | 10.994 | 33.176 |
| Selenium | Se (ppm) | 0.153 | 0.037 | 0.100 | 0.375 |
| Titanium | Ti (wt%) | 0.246 | 0.042 | 0.148 | 0.378 |
| Zinc | Zn (ppm) | 24.923 | 5.582 | 12.410 | 45.998 |