| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.194 | 2.015 | 0.540 | 7.478 |
| Arsenic | As (ppm) | 9.581 | 7.283 | 1.463 | 30.120 |
| Calcium | Ca (wt%) | 0.930 | 0.950 | 0.025 | 3.715 |
| Copper | Cu (ppm) | 6.782 | 4.035 | 2.125 | 18.399 |
| Iron | Fe (wt%) | 2.424 | 1.408 | 0.448 | 5.491 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.027 |
| Magnesium | Mg (wt%) | 0.174 | 0.120 | 0.024 | 0.417 |
| Manganese | Mn (ppm) | 558.194 | 289.821 | 161.056 | 1371.700 |
| Sodium | Na (wt%) | 0.092 | 0.054 | 0.017 | 0.186 |
| Phosphorus | P (wt%) | 0.051 | 0.035 | 0.007 | 0.143 |
| Lead | Pb (ppm) | 27.943 | 10.495 | 9.520 | 62.202 |
| Selenium | Se (ppm) | 0.328 | 0.195 | 0.100 | 0.768 |
| Titanium | Ti (wt%) | 0.575 | 0.164 | 0.234 | 1.041 |
| Zinc | Zn (ppm) | 44.345 | 26.816 | 9.447 | 104.317 |