| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.082 | 0.665 | 3.312 | 7.850 |
| Arsenic | As (ppm) | 5.921 | 1.827 | 1.914 | 12.449 |
| Calcium | Ca (wt%) | 2.637 | 1.294 | 0.699 | 8.077 |
| Copper | Cu (ppm) | 15.538 | 3.202 | 6.410 | 27.900 |
| Iron | Fe (wt%) | 2.266 | 0.448 | 1.330 | 4.637 |
| Mercury | Hg (ppm) | 0.021 | 0.009 | 0.010 | 0.090 |
| Magnesium | Mg (wt%) | 1.046 | 0.399 | 0.576 | 3.248 |
| Manganese | Mn (ppm) | 410.185 | 134.198 | 186.907 | 989.525 |
| Sodium | Na (wt%) | 0.614 | 0.223 | 0.237 | 1.951 |
| Phosphorus | P (wt%) | 0.084 | 0.035 | 0.040 | 0.325 |
| Lead | Pb (ppm) | 16.730 | 2.198 | 11.035 | 27.393 |
| Selenium | Se (ppm) | 0.438 | 0.170 | 0.102 | 1.098 |
| Titanium | Ti (wt%) | 0.254 | 0.055 | 0.146 | 0.569 |
| Zinc | Zn (ppm) | 57.345 | 11.212 | 24.640 | 116.580 |