| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.960 | 0.410 | 3.125 | 5.417 |
| Arsenic | As (ppm) | 4.278 | 1.692 | 0.794 | 11.841 |
| Calcium | Ca (wt%) | 1.313 | 0.337 | 0.880 | 4.089 |
| Copper | Cu (ppm) | 9.701 | 1.758 | 4.130 | 15.735 |
| Iron | Fe (wt%) | 2.541 | 0.457 | 1.233 | 3.523 |
| Mercury | Hg (ppm) | 0.029 | 0.013 | 0.010 | 0.098 |
| Magnesium | Mg (wt%) | 0.561 | 0.153 | 0.337 | 2.106 |
| Manganese | Mn (ppm) | 662.517 | 111.974 | 397.570 | 1046.120 |
| Sodium | Na (wt%) | 1.225 | 0.157 | 0.792 | 1.958 |
| Phosphorus | P (wt%) | 0.056 | 0.012 | 0.031 | 0.099 |
| Lead | Pb (ppm) | 21.201 | 4.245 | 11.216 | 42.345 |
| Selenium | Se (ppm) | 0.122 | 0.025 | 0.100 | 0.283 |
| Titanium | Ti (wt%) | 0.679 | 0.121 | 0.309 | 0.973 |
| Zinc | Zn (ppm) | 41.162 | 6.216 | 26.784 | 82.528 |