| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.662 | 1.034 | 2.842 | 7.887 |
| Arsenic | As (ppm) | 4.954 | 1.237 | 1.907 | 9.044 |
| Calcium | Ca (wt%) | 1.124 | 0.712 | 0.116 | 3.341 |
| Copper | Cu (ppm) | 18.451 | 6.164 | 5.080 | 36.753 |
| Iron | Fe (wt%) | 4.035 | 0.907 | 1.770 | 6.989 |
| Mercury | Hg (ppm) | 0.070 | 0.022 | 0.029 | 0.132 |
| Magnesium | Mg (wt%) | 0.668 | 0.275 | 0.208 | 1.576 |
| Manganese | Mn (ppm) | 862.702 | 282.473 | 292.213 | 1533.010 |
| Sodium | Na (wt%) | 0.729 | 0.229 | 0.294 | 1.351 |
| Phosphorus | P (wt%) | 0.055 | 0.019 | 0.022 | 0.152 |
| Lead | Pb (ppm) | 24.905 | 2.446 | 17.045 | 35.618 |
| Selenium | Se (ppm) | 0.355 | 0.162 | 0.111 | 0.891 |
| Titanium | Ti (wt%) | 0.641 | 0.197 | 0.319 | 1.552 |
| Zinc | Zn (ppm) | 87.399 | 24.392 | 30.478 | 158.136 |