| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.553 | 1.406 | 2.618 | 8.945 |
| Arsenic | As (ppm) | 8.184 | 1.473 | 3.910 | 12.324 |
| Calcium | Ca (wt%) | 0.105 | 0.030 | 0.065 | 0.216 |
| Copper | Cu (ppm) | 10.288 | 2.435 | 5.334 | 17.513 |
| Iron | Fe (wt%) | 2.759 | 0.595 | 1.776 | 4.535 |
| Mercury | Hg (ppm) | 0.049 | 0.058 | 0.012 | 0.429 |
| Magnesium | Mg (wt%) | 0.263 | 0.090 | 0.131 | 0.483 |
| Manganese | Mn (ppm) | 983.679 | 384.130 | 169.196 | 2017.240 |
| Sodium | Na (wt%) | 0.186 | 0.045 | 0.105 | 0.284 |
| Phosphorus | P (wt%) | 0.043 | 0.009 | 0.024 | 0.066 |
| Lead | Pb (ppm) | 23.721 | 5.964 | 10.889 | 48.476 |
| Selenium | Se (ppm) | 0.289 | 0.095 | 0.104 | 0.496 |
| Titanium | Ti (wt%) | 0.287 | 0.048 | 0.207 | 0.447 |
| Zinc | Zn (ppm) | 61.766 | 14.851 | 34.032 | 106.862 |