| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.475 | 0.690 | 2.774 | 5.621 |
| Arsenic | As (ppm) | 5.845 | 1.195 | 2.505 | 9.245 |
| Calcium | Ca (wt%) | 1.723 | 0.620 | 0.707 | 4.228 |
| Copper | Cu (ppm) | 11.245 | 1.758 | 6.055 | 14.947 |
| Iron | Fe (wt%) | 1.912 | 0.271 | 1.261 | 2.455 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.463 | 0.101 | 0.253 | 0.682 |
| Manganese | Mn (ppm) | 267.363 | 38.588 | 158.388 | 329.262 |
| Sodium | Na (wt%) | 0.464 | 0.064 | 0.322 | 0.577 |
| Phosphorus | P (wt%) | 0.034 | 0.008 | 0.015 | 0.055 |
| Lead | Pb (ppm) | 19.804 | 2.586 | 11.162 | 25.229 |
| Selenium | Se (ppm) | 0.229 | 0.075 | 0.100 | 0.398 |
| Titanium | Ti (wt%) | 0.236 | 0.019 | 0.191 | 0.273 |
| Zinc | Zn (ppm) | 47.484 | 7.701 | 26.376 | 61.560 |