| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.153 | 0.264 | 3.417 | 5.278 |
| Arsenic | As (ppm) | 10.901 | 2.348 | 6.444 | 18.818 |
| Calcium | Ca (wt%) | 0.817 | 0.587 | 0.083 | 1.929 |
| Copper | Cu (ppm) | 13.998 | 1.778 | 11.025 | 21.305 |
| Iron | Fe (wt%) | 2.916 | 0.283 | 2.382 | 4.058 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.590 | 0.206 | 0.275 | 1.020 |
| Manganese | Mn (ppm) | 803.391 | 149.985 | 522.025 | 1208.210 |
| Sodium | Na (wt%) | 0.631 | 0.175 | 0.314 | 1.148 |
| Phosphorus | P (wt%) | 0.060 | 0.007 | 0.045 | 0.081 |
| Lead | Pb (ppm) | 20.578 | 4.463 | 13.633 | 34.798 |
| Selenium | Se (ppm) | 0.221 | 0.073 | 0.101 | 0.395 |
| Titanium | Ti (wt%) | 0.392 | 0.086 | 0.243 | 0.631 |
| Zinc | Zn (ppm) | 78.525 | 10.388 | 60.420 | 120.051 |