| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.811 | 1.297 | 3.745 | 13.487 |
| Arsenic | As (ppm) | 6.132 | 3.020 | 1.868 | 17.831 |
| Calcium | Ca (wt%) | 1.575 | 0.988 | 0.224 | 6.608 |
| Copper | Cu (ppm) | 55.395 | 17.114 | 14.071 | 118.912 |
| Iron | Fe (wt%) | 5.131 | 1.402 | 1.602 | 20.873 |
| Mercury | Hg (ppm) | 0.058 | 0.037 | 0.010 | 0.279 |
| Magnesium | Mg (wt%) | 1.387 | 0.977 | 0.171 | 7.797 |
| Manganese | Mn (ppm) | 1250.490 | 599.164 | 191.525 | 4936.970 |
| Sodium | Na (wt%) | 1.169 | 0.487 | 0.160 | 2.976 |
| Phosphorus | P (wt%) | 0.075 | 0.024 | 0.019 | 0.168 |
| Lead | Pb (ppm) | 20.887 | 8.415 | 5.147 | 51.828 |
| Selenium | Se (ppm) | 0.433 | 0.486 | 0.100 | 3.542 |
| Titanium | Ti (wt%) | 0.505 | 0.106 | 0.168 | 0.927 |
| Zinc | Zn (ppm) | 112.525 | 36.878 | 38.167 | 344.376 |