| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.239 | 0.798 | 1.242 | 6.024 |
| Arsenic | As (ppm) | 3.665 | 1.234 | 1.174 | 7.910 |
| Calcium | Ca (wt%) | 0.656 | 0.166 | 0.181 | 1.086 |
| Copper | Cu (ppm) | 6.670 | 1.683 | 2.034 | 12.009 |
| Iron | Fe (wt%) | 1.402 | 0.443 | 0.570 | 2.904 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.470 | 0.134 | 0.177 | 0.952 |
| Manganese | Mn (ppm) | 390.960 | 192.394 | 135.463 | 1049.480 |
| Sodium | Na (wt%) | 0.473 | 0.110 | 0.243 | 0.888 |
| Phosphorus | P (wt%) | 0.019 | 0.005 | 0.006 | 0.034 |
| Lead | Pb (ppm) | 14.053 | 3.560 | 5.518 | 25.857 |
| Selenium | Se (ppm) | 0.194 | 0.077 | 0.100 | 0.487 |
| Titanium | Ti (wt%) | 0.179 | 0.027 | 0.125 | 0.264 |
| Zinc | Zn (ppm) | 25.963 | 7.732 | 9.870 | 48.458 |