| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.868 | 0.841 | 2.680 | 6.612 |
| Arsenic | As (ppm) | 2.329 | 0.703 | 1.189 | 5.052 |
| Calcium | Ca (wt%) | 0.266 | 0.260 | 0.047 | 1.237 |
| Copper | Cu (ppm) | 8.943 | 2.235 | 5.161 | 14.722 |
| Iron | Fe (wt%) | 2.799 | 0.491 | 1.225 | 3.641 |
| Mercury | Hg (ppm) | 0.040 | 0.012 | 0.015 | 0.082 |
| Magnesium | Mg (wt%) | 0.152 | 0.071 | 0.077 | 0.408 |
| Manganese | Mn (ppm) | 537.603 | 61.246 | 394.653 | 661.728 |
| Sodium | Na (wt%) | 0.284 | 0.245 | 0.083 | 1.201 |
| Phosphorus | P (wt%) | 0.078 | 0.026 | 0.050 | 0.170 |
| Lead | Pb (ppm) | 39.664 | 8.747 | 22.511 | 64.176 |
| Selenium | Se (ppm) | 0.185 | 0.035 | 0.108 | 0.277 |
| Titanium | Ti (wt%) | 0.959 | 0.258 | 0.567 | 1.807 |
| Zinc | Zn (ppm) | 59.409 | 13.819 | 25.909 | 93.781 |