| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.242 | 0.317 | 3.644 | 5.167 |
| Arsenic | As (ppm) | 5.685 | 1.013 | 3.304 | 9.305 |
| Calcium | Ca (wt%) | 3.438 | 1.328 | 0.655 | 10.045 |
| Copper | Cu (ppm) | 12.724 | 2.390 | 8.768 | 21.629 |
| Iron | Fe (wt%) | 1.751 | 0.210 | 1.081 | 2.423 |
| Mercury | Hg (ppm) | 0.012 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 1.261 | 0.288 | 0.385 | 2.250 |
| Manganese | Mn (ppm) | 539.867 | 255.810 | 189.534 | 1458.770 |
| Sodium | Na (wt%) | 0.814 | 0.116 | 0.537 | 1.317 |
| Phosphorus | P (wt%) | 0.039 | 0.005 | 0.026 | 0.059 |
| Lead | Pb (ppm) | 21.703 | 1.369 | 16.478 | 28.544 |
| Selenium | Se (ppm) | 0.365 | 0.237 | 0.100 | 2.298 |
| Titanium | Ti (wt%) | 0.247 | 0.028 | 0.187 | 0.365 |
| Zinc | Zn (ppm) | 32.715 | 6.296 | 19.184 | 50.466 |