| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.898 | 0.277 | 6.437 | 7.781 |
| Arsenic | As (ppm) | 3.774 | 0.670 | 2.664 | 8.144 |
| Calcium | Ca (wt%) | 1.918 | 0.449 | 1.233 | 3.879 |
| Copper | Cu (ppm) | 17.362 | 3.854 | 8.196 | 29.606 |
| Iron | Fe (wt%) | 3.598 | 0.554 | 2.755 | 6.737 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.807 | 0.155 | 0.585 | 1.354 |
| Manganese | Mn (ppm) | 635.470 | 66.882 | 486.336 | 1032.860 |
| Sodium | Na (wt%) | 1.607 | 0.132 | 1.398 | 1.993 |
| Phosphorus | P (wt%) | 0.092 | 0.023 | 0.046 | 0.215 |
| Lead | Pb (ppm) | 15.130 | 5.750 | 4.189 | 25.450 |
| Selenium | Se (ppm) | 0.119 | 0.033 | 0.100 | 0.289 |
| Titanium | Ti (wt%) | 0.558 | 0.109 | 0.400 | 1.177 |
| Zinc | Zn (ppm) | 65.321 | 7.933 | 45.208 | 93.879 |