| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.582 | 0.613 | 1.774 | 7.633 |
| Arsenic | As (ppm) | 7.409 | 3.523 | 1.656 | 23.588 |
| Calcium | Ca (wt%) | 1.907 | 2.146 | 0.078 | 19.169 |
| Copper | Cu (ppm) | 21.817 | 9.782 | 6.514 | 100.771 |
| Iron | Fe (wt%) | 2.288 | 0.345 | 0.858 | 3.350 |
| Mercury | Hg (ppm) | 0.052 | 0.026 | 0.010 | 0.208 |
| Magnesium | Mg (wt%) | 1.375 | 0.772 | 0.338 | 8.664 |
| Manganese | Mn (ppm) | 540.682 | 174.005 | 121.416 | 1666.150 |
| Sodium | Na (wt%) | 0.728 | 0.173 | 0.105 | 1.334 |
| Phosphorus | P (wt%) | 0.057 | 0.013 | 0.017 | 0.121 |
| Lead | Pb (ppm) | 21.092 | 5.553 | 6.753 | 56.805 |
| Selenium | Se (ppm) | 0.421 | 0.197 | 0.101 | 1.926 |
| Titanium | Ti (wt%) | 0.233 | 0.047 | 0.075 | 0.405 |
| Zinc | Zn (ppm) | 67.689 | 27.931 | 17.961 | 367.802 |