| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.691 | 1.046 | 2.556 | 7.384 |
| Arsenic | As (ppm) | 15.880 | 16.850 | 4.501 | 171.381 |
| Calcium | Ca (wt%) | 2.591 | 1.342 | 0.647 | 8.397 |
| Copper | Cu (ppm) | 19.953 | 5.228 | 3.622 | 50.766 |
| Iron | Fe (wt%) | 2.580 | 0.490 | 1.318 | 4.530 |
| Mercury | Hg (ppm) | 0.041 | 0.016 | 0.012 | 0.156 |
| Magnesium | Mg (wt%) | 0.968 | 0.264 | 0.300 | 2.624 |
| Manganese | Mn (ppm) | 371.052 | 112.178 | 145.147 | 911.115 |
| Sodium | Na (wt%) | 0.797 | 0.416 | 0.064 | 1.931 |
| Phosphorus | P (wt%) | 0.079 | 0.015 | 0.041 | 0.119 |
| Lead | Pb (ppm) | 21.207 | 3.707 | 8.220 | 36.983 |
| Selenium | Se (ppm) | 0.866 | 0.373 | 0.182 | 2.661 |
| Titanium | Ti (wt%) | 0.275 | 0.059 | 0.131 | 0.415 |
| Zinc | Zn (ppm) | 88.675 | 22.762 | 39.181 | 251.033 |