| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.214 | 0.304 | 3.328 | 4.942 |
| Arsenic | As (ppm) | 8.175 | 1.496 | 4.904 | 12.811 |
| Calcium | Ca (wt%) | 0.445 | 0.196 | 0.241 | 1.082 |
| Copper | Cu (ppm) | 9.511 | 1.076 | 6.910 | 11.465 |
| Iron | Fe (wt%) | 1.453 | 0.217 | 1.044 | 2.160 |
| Mercury | Hg (ppm) | 0.024 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.386 | 0.298 | 0.161 | 1.486 |
| Manganese | Mn (ppm) | 420.725 | 96.983 | 237.974 | 681.815 |
| Sodium | Na (wt%) | 0.740 | 0.115 | 0.547 | 1.084 |
| Phosphorus | P (wt%) | 0.039 | 0.007 | 0.025 | 0.059 |
| Lead | Pb (ppm) | 13.302 | 0.880 | 11.041 | 15.375 |
| Selenium | Se (ppm) | 0.282 | 0.069 | 0.103 | 0.489 |
| Titanium | Ti (wt%) | 0.277 | 0.017 | 0.233 | 0.324 |
| Zinc | Zn (ppm) | 41.102 | 5.403 | 29.294 | 51.755 |