| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.267 | 0.658 | 2.303 | 5.748 |
| Arsenic | As (ppm) | 5.771 | 1.401 | 3.864 | 12.700 |
| Calcium | Ca (wt%) | 0.157 | 0.068 | 0.055 | 0.339 |
| Copper | Cu (ppm) | 9.354 | 2.616 | 5.069 | 22.999 |
| Iron | Fe (wt%) | 1.385 | 0.296 | 0.769 | 2.890 |
| Mercury | Hg (ppm) | 0.028 | 0.008 | 0.010 | 0.046 |
| Magnesium | Mg (wt%) | 0.200 | 0.093 | 0.096 | 0.555 |
| Manganese | Mn (ppm) | 568.498 | 201.337 | 163.006 | 1015.770 |
| Sodium | Na (wt%) | 0.427 | 0.214 | 0.163 | 1.069 |
| Phosphorus | P (wt%) | 0.023 | 0.005 | 0.014 | 0.039 |
| Lead | Pb (ppm) | 15.391 | 1.822 | 8.823 | 18.448 |
| Selenium | Se (ppm) | 0.272 | 0.074 | 0.106 | 0.621 |
| Titanium | Ti (wt%) | 0.326 | 0.036 | 0.206 | 0.399 |
| Zinc | Zn (ppm) | 29.330 | 7.033 | 17.114 | 57.998 |