| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.176 | 0.330 | 3.904 | 7.121 |
| Arsenic | As (ppm) | 5.270 | 3.593 | 0.385 | 26.226 |
| Calcium | Ca (wt%) | 0.969 | 0.141 | 0.622 | 1.924 |
| Copper | Cu (ppm) | 7.060 | 1.943 | 2.432 | 18.489 |
| Iron | Fe (wt%) | 1.384 | 0.336 | 0.518 | 3.067 |
| Mercury | Hg (ppm) | 0.039 | 0.010 | 0.015 | 0.082 |
| Magnesium | Mg (wt%) | 0.300 | 0.102 | 0.113 | 1.027 |
| Manganese | Mn (ppm) | 757.479 | 166.318 | 375.040 | 1369.570 |
| Sodium | Na (wt%) | 1.724 | 0.126 | 1.315 | 2.084 |
| Phosphorus | P (wt%) | 0.047 | 0.010 | 0.023 | 0.112 |
| Lead | Pb (ppm) | 28.291 | 6.523 | 13.809 | 65.275 |
| Selenium | Se (ppm) | 0.122 | 0.029 | 0.100 | 0.284 |
| Titanium | Ti (wt%) | 0.451 | 0.107 | 0.209 | 0.904 |
| Zinc | Zn (ppm) | 29.291 | 7.627 | 9.397 | 73.038 |