| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.764 | 0.397 | 1.626 | 4.714 |
| Arsenic | As (ppm) | 6.313 | 1.065 | 3.281 | 10.874 |
| Calcium | Ca (wt%) | 2.360 | 2.100 | 0.158 | 8.458 |
| Copper | Cu (ppm) | 8.667 | 2.628 | 3.139 | 21.531 |
| Iron | Fe (wt%) | 1.645 | 0.375 | 0.787 | 3.172 |
| Mercury | Hg (ppm) | 0.022 | 0.007 | 0.010 | 0.051 |
| Magnesium | Mg (wt%) | 0.240 | 0.089 | 0.073 | 0.698 |
| Manganese | Mn (ppm) | 539.421 | 226.887 | 148.859 | 2047.470 |
| Sodium | Na (wt%) | 0.183 | 0.063 | 0.066 | 0.493 |
| Phosphorus | P (wt%) | 0.024 | 0.008 | 0.011 | 0.073 |
| Lead | Pb (ppm) | 16.789 | 3.195 | 7.180 | 26.858 |
| Selenium | Se (ppm) | 0.222 | 0.087 | 0.103 | 0.688 |
| Titanium | Ti (wt%) | 0.301 | 0.108 | 0.188 | 0.798 |
| Zinc | Zn (ppm) | 27.680 | 8.474 | 9.679 | 72.228 |