| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.514 | 0.914 | 0.251 | 5.463 |
| Arsenic | As (ppm) | 4.323 | 2.838 | 0.834 | 13.984 |
| Calcium | Ca (wt%) | 0.318 | 0.269 | 0.012 | 1.405 |
| Copper | Cu (ppm) | 6.977 | 2.833 | 1.056 | 16.144 |
| Iron | Fe (wt%) | 0.998 | 0.312 | 0.148 | 2.129 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.303 | 0.238 | 0.013 | 1.312 |
| Manganese | Mn (ppm) | 243.182 | 78.850 | 25.983 | 507.540 |
| Sodium | Na (wt%) | 0.399 | 0.166 | 0.013 | 0.823 |
| Phosphorus | P (wt%) | 0.020 | 0.011 | 0.003 | 0.053 |
| Lead | Pb (ppm) | 11.099 | 2.380 | 6.038 | 19.217 |
| Selenium | Se (ppm) | 0.142 | 0.035 | 0.100 | 0.290 |
| Titanium | Ti (wt%) | 0.263 | 0.080 | 0.179 | 0.572 |
| Zinc | Zn (ppm) | 23.522 | 8.202 | 4.199 | 51.470 |