| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.429 | 0.658 | 0.833 | 5.348 |
| Arsenic | As (ppm) | 9.722 | 2.960 | 3.416 | 18.630 |
| Calcium | Ca (wt%) | 0.119 | 0.045 | 0.037 | 0.239 |
| Copper | Cu (ppm) | 9.292 | 1.873 | 4.339 | 14.991 |
| Iron | Fe (wt%) | 2.556 | 0.550 | 1.253 | 4.261 |
| Mercury | Hg (ppm) | 0.035 | 0.009 | 0.012 | 0.060 |
| Magnesium | Mg (wt%) | 0.206 | 0.051 | 0.042 | 0.316 |
| Manganese | Mn (ppm) | 963.604 | 281.574 | 139.672 | 2138.100 |
| Sodium | Na (wt%) | 0.108 | 0.026 | 0.036 | 0.205 |
| Phosphorus | P (wt%) | 0.043 | 0.007 | 0.024 | 0.071 |
| Lead | Pb (ppm) | 16.596 | 2.793 | 6.684 | 27.981 |
| Selenium | Se (ppm) | 0.303 | 0.128 | 0.100 | 0.743 |
| Titanium | Ti (wt%) | 0.228 | 0.041 | 0.062 | 0.304 |
| Zinc | Zn (ppm) | 71.693 | 17.430 | 24.569 | 116.004 |