| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.914 | 0.659 | 3.048 | 5.891 |
| Arsenic | As (ppm) | 7.344 | 1.991 | 4.316 | 12.679 |
| Calcium | Ca (wt%) | 1.499 | 0.798 | 0.203 | 3.889 |
| Copper | Cu (ppm) | 25.036 | 8.617 | 13.360 | 49.225 |
| Iron | Fe (wt%) | 3.036 | 0.483 | 1.700 | 3.897 |
| Mercury | Hg (ppm) | 0.080 | 0.016 | 0.050 | 0.112 |
| Magnesium | Mg (wt%) | 0.706 | 0.166 | 0.358 | 1.174 |
| Manganese | Mn (ppm) | 842.082 | 139.091 | 589.802 | 1153.230 |
| Sodium | Na (wt%) | 0.418 | 0.094 | 0.237 | 0.726 |
| Phosphorus | P (wt%) | 0.076 | 0.019 | 0.034 | 0.120 |
| Lead | Pb (ppm) | 90.909 | 39.868 | 22.967 | 236.546 |
| Selenium | Se (ppm) | 0.596 | 0.083 | 0.411 | 0.961 |
| Titanium | Ti (wt%) | 0.354 | 0.064 | 0.265 | 0.564 |
| Zinc | Zn (ppm) | 174.296 | 52.447 | 127.337 | 366.372 |