| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.488 | 0.462 | 3.399 | 6.704 |
| Arsenic | As (ppm) | 6.824 | 2.093 | 1.886 | 14.861 |
| Calcium | Ca (wt%) | 3.988 | 2.052 | 0.479 | 16.918 |
| Copper | Cu (ppm) | 18.745 | 5.808 | 1.002 | 52.022 |
| Iron | Fe (wt%) | 2.177 | 0.280 | 1.243 | 3.446 |
| Mercury | Hg (ppm) | 0.028 | 0.009 | 0.010 | 0.092 |
| Magnesium | Mg (wt%) | 1.518 | 0.578 | 0.667 | 4.602 |
| Manganese | Mn (ppm) | 357.904 | 81.490 | 146.994 | 783.865 |
| Sodium | Na (wt%) | 0.828 | 0.144 | 0.386 | 1.290 |
| Phosphorus | P (wt%) | 0.065 | 0.005 | 0.045 | 0.093 |
| Lead | Pb (ppm) | 14.815 | 2.547 | 5.388 | 23.620 |
| Selenium | Se (ppm) | 0.633 | 0.368 | 0.139 | 5.235 |
| Titanium | Ti (wt%) | 0.240 | 0.026 | 0.132 | 0.356 |
| Zinc | Zn (ppm) | 71.452 | 14.534 | 34.004 | 149.380 |