| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.552 | 0.640 | 1.276 | 4.140 |
| Arsenic | As (ppm) | 2.994 | 0.646 | 1.656 | 4.285 |
| Calcium | Ca (wt%) | 2.210 | 2.521 | 0.300 | 15.111 |
| Copper | Cu (ppm) | 5.201 | 1.508 | 3.165 | 11.156 |
| Iron | Fe (wt%) | 1.099 | 0.254 | 0.560 | 1.617 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.026 |
| Magnesium | Mg (wt%) | 0.344 | 0.157 | 0.097 | 0.883 |
| Manganese | Mn (ppm) | 343.071 | 55.898 | 208.583 | 521.201 |
| Sodium | Na (wt%) | 0.331 | 0.112 | 0.139 | 0.677 |
| Phosphorus | P (wt%) | 0.022 | 0.006 | 0.007 | 0.040 |
| Lead | Pb (ppm) | 14.200 | 2.054 | 9.485 | 18.934 |
| Selenium | Se (ppm) | 0.162 | 0.040 | 0.104 | 0.341 |
| Titanium | Ti (wt%) | 0.158 | 0.028 | 0.097 | 0.230 |
| Zinc | Zn (ppm) | 21.702 | 4.879 | 11.249 | 32.843 |