| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.259 | 0.710 | 2.102 | 4.895 |
| Arsenic | As (ppm) | 1.969 | 1.868 | 0.769 | 15.304 |
| Calcium | Ca (wt%) | 0.154 | 0.054 | 0.021 | 0.258 |
| Copper | Cu (ppm) | 7.500 | 1.372 | 2.262 | 11.268 |
| Iron | Fe (wt%) | 2.365 | 0.391 | 1.120 | 3.282 |
| Mercury | Hg (ppm) | 0.018 | 0.005 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.314 | 0.083 | 0.122 | 0.457 |
| Manganese | Mn (ppm) | 567.878 | 84.399 | 299.015 | 854.900 |
| Sodium | Na (wt%) | 0.258 | 0.111 | 0.033 | 0.547 |
| Phosphorus | P (wt%) | 0.016 | 0.006 | 0.006 | 0.037 |
| Lead | Pb (ppm) | 15.459 | 1.932 | 10.920 | 19.854 |
| Selenium | Se (ppm) | 0.151 | 0.037 | 0.100 | 0.299 |
| Titanium | Ti (wt%) | 0.646 | 0.105 | 0.489 | 1.010 |
| Zinc | Zn (ppm) | 51.653 | 11.709 | 26.422 | 81.075 |