| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.875 | 0.763 | 0.540 | 3.610 |
| Arsenic | As (ppm) | 3.304 | 1.068 | 1.726 | 5.980 |
| Calcium | Ca (wt%) | 0.184 | 0.160 | 0.022 | 0.630 |
| Copper | Cu (ppm) | 5.397 | 1.745 | 3.021 | 10.594 |
| Iron | Fe (wt%) | 0.956 | 0.392 | 0.407 | 1.923 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.115 | 0.081 | 0.026 | 0.343 |
| Manganese | Mn (ppm) | 248.061 | 161.263 | 67.505 | 896.158 |
| Sodium | Na (wt%) | 0.168 | 0.093 | 0.027 | 0.348 |
| Phosphorus | P (wt%) | 0.016 | 0.008 | 0.005 | 0.052 |
| Lead | Pb (ppm) | 15.306 | 4.676 | 7.168 | 30.760 |
| Selenium | Se (ppm) | 0.164 | 0.049 | 0.100 | 0.294 |
| Titanium | Ti (wt%) | 0.316 | 0.093 | 0.180 | 0.663 |
| Zinc | Zn (ppm) | 20.707 | 8.091 | 8.469 | 41.126 |