| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.986 | 0.295 | 3.063 | 5.024 |
| Arsenic | As (ppm) | 6.654 | 0.780 | 4.976 | 8.820 |
| Calcium | Ca (wt%) | 0.245 | 0.032 | 0.176 | 0.395 |
| Copper | Cu (ppm) | 11.637 | 1.958 | 7.179 | 18.137 |
| Iron | Fe (wt%) | 1.395 | 0.134 | 1.060 | 1.874 |
| Mercury | Hg (ppm) | 0.037 | 0.011 | 0.021 | 0.070 |
| Magnesium | Mg (wt%) | 0.201 | 0.030 | 0.140 | 0.365 |
| Manganese | Mn (ppm) | 851.706 | 234.393 | 317.666 | 1627.200 |
| Sodium | Na (wt%) | 0.621 | 0.086 | 0.372 | 0.848 |
| Phosphorus | P (wt%) | 0.038 | 0.007 | 0.023 | 0.057 |
| Lead | Pb (ppm) | 18.817 | 4.375 | 14.469 | 41.367 |
| Selenium | Se (ppm) | 0.527 | 0.376 | 0.107 | 1.951 |
| Titanium | Ti (wt%) | 0.301 | 0.013 | 0.273 | 0.335 |
| Zinc | Zn (ppm) | 46.231 | 7.362 | 30.720 | 73.465 |