| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.113 | 0.304 | 2.418 | 3.921 |
| Arsenic | As (ppm) | 4.293 | 0.752 | 3.065 | 7.699 |
| Calcium | Ca (wt%) | 0.239 | 0.059 | 0.130 | 0.435 |
| Copper | Cu (ppm) | 11.503 | 2.081 | 7.308 | 20.790 |
| Iron | Fe (wt%) | 1.114 | 0.151 | 0.748 | 1.485 |
| Mercury | Hg (ppm) | 0.029 | 0.006 | 0.020 | 0.050 |
| Magnesium | Mg (wt%) | 0.169 | 0.023 | 0.107 | 0.245 |
| Manganese | Mn (ppm) | 379.760 | 131.683 | 150.096 | 925.227 |
| Sodium | Na (wt%) | 0.500 | 0.084 | 0.340 | 0.746 |
| Phosphorus | P (wt%) | 0.024 | 0.006 | 0.015 | 0.040 |
| Lead | Pb (ppm) | 18.536 | 1.969 | 14.297 | 27.787 |
| Selenium | Se (ppm) | 0.410 | 0.106 | 0.111 | 0.654 |
| Titanium | Ti (wt%) | 0.323 | 0.024 | 0.256 | 0.387 |
| Zinc | Zn (ppm) | 25.352 | 6.126 | 13.732 | 44.606 |