| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.497 | 0.658 | 4.736 | 9.368 |
| Arsenic | As (ppm) | 6.754 | 8.146 | 0.312 | 90.811 |
| Calcium | Ca (wt%) | 2.911 | 0.891 | 0.557 | 8.901 |
| Copper | Cu (ppm) | 39.245 | 54.589 | 6.065 | 529.237 |
| Iron | Fe (wt%) | 5.145 | 2.285 | 1.189 | 26.855 |
| Mercury | Hg (ppm) | 0.149 | 0.217 | 0.010 | 1.849 |
| Magnesium | Mg (wt%) | 1.255 | 0.428 | 0.387 | 3.072 |
| Manganese | Mn (ppm) | 918.831 | 389.522 | 299.946 | 3299.570 |
| Sodium | Na (wt%) | 2.173 | 0.376 | 0.964 | 3.937 |
| Phosphorus | P (wt%) | 0.130 | 0.043 | 0.042 | 0.416 |
| Lead | Pb (ppm) | 50.480 | 68.866 | 2.205 | 634.625 |
| Selenium | Se (ppm) | 0.466 | 0.986 | 0.100 | 9.217 |
| Titanium | Ti (wt%) | 0.617 | 0.193 | 0.246 | 1.564 |
| Zinc | Zn (ppm) | 108.638 | 86.507 | 30.285 | 875.535 |