| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.572 | 0.625 | 2.809 | 5.990 |
| Arsenic | As (ppm) | 7.310 | 1.006 | 3.918 | 9.885 |
| Calcium | Ca (wt%) | 0.226 | 0.051 | 0.121 | 0.351 |
| Copper | Cu (ppm) | 9.420 | 3.615 | 1.000 | 20.949 |
| Iron | Fe (wt%) | 2.712 | 0.366 | 1.609 | 3.524 |
| Mercury | Hg (ppm) | 0.131 | 0.156 | 0.030 | 0.911 |
| Magnesium | Mg (wt%) | 0.501 | 0.080 | 0.281 | 0.682 |
| Manganese | Mn (ppm) | 690.825 | 169.196 | 441.055 | 1446.000 |
| Sodium | Na (wt%) | 0.482 | 0.027 | 0.417 | 0.557 |
| Phosphorus | P (wt%) | 0.049 | 0.005 | 0.032 | 0.060 |
| Lead | Pb (ppm) | 30.496 | 9.383 | 17.841 | 76.596 |
| Selenium | Se (ppm) | 0.221 | 0.047 | 0.101 | 0.399 |
| Titanium | Ti (wt%) | 0.233 | 0.011 | 0.207 | 0.263 |
| Zinc | Zn (ppm) | 99.470 | 26.413 | 66.409 | 249.560 |