| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.217 | 0.874 | 2.760 | 6.049 |
| Arsenic | As (ppm) | 1.100 | 0.148 | 0.617 | 1.510 |
| Calcium | Ca (wt%) | 0.946 | 0.199 | 0.514 | 1.483 |
| Copper | Cu (ppm) | 9.687 | 1.613 | 4.486 | 13.872 |
| Iron | Fe (wt%) | 3.849 | 1.408 | 1.496 | 8.005 |
| Mercury | Hg (ppm) | 0.034 | 0.015 | 0.010 | 0.079 |
| Magnesium | Mg (wt%) | 0.253 | 0.055 | 0.145 | 0.396 |
| Manganese | Mn (ppm) | 1224.820 | 339.279 | 590.609 | 2068.520 |
| Sodium | Na (wt%) | 0.639 | 0.222 | 0.309 | 1.605 |
| Phosphorus | P (wt%) | 0.018 | 0.005 | 0.005 | 0.027 |
| Lead | Pb (ppm) | 24.421 | 4.520 | 14.165 | 35.474 |
| Selenium | Se (ppm) | 0.121 | 0.018 | 0.100 | 0.177 |
| Titanium | Ti (wt%) | 0.883 | 0.209 | 0.428 | 1.326 |
| Zinc | Zn (ppm) | 37.897 | 6.567 | 22.025 | 54.652 |