| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.382 | 0.757 | 1.437 | 5.716 |
| Arsenic | As (ppm) | 7.746 | 1.968 | 2.166 | 13.888 |
| Calcium | Ca (wt%) | 7.182 | 4.394 | 0.321 | 20.094 |
| Copper | Cu (ppm) | 10.864 | 2.198 | 5.062 | 17.915 |
| Iron | Fe (wt%) | 1.985 | 0.475 | 0.760 | 3.544 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.019 |
| Magnesium | Mg (wt%) | 0.300 | 0.079 | 0.072 | 0.538 |
| Manganese | Mn (ppm) | 726.724 | 272.716 | 278.080 | 2366.750 |
| Sodium | Na (wt%) | 0.142 | 0.039 | 0.041 | 0.231 |
| Phosphorus | P (wt%) | 0.040 | 0.011 | 0.015 | 0.075 |
| Lead | Pb (ppm) | 18.227 | 6.542 | 5.003 | 51.382 |
| Selenium | Se (ppm) | 0.326 | 0.164 | 0.100 | 1.340 |
| Titanium | Ti (wt%) | 0.241 | 0.061 | 0.138 | 0.394 |
| Zinc | Zn (ppm) | 37.846 | 10.972 | 16.005 | 70.433 |