| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.956 | 0.330 | 2.728 | 4.576 |
| Arsenic | As (ppm) | 4.874 | 1.505 | 2.521 | 12.222 |
| Calcium | Ca (wt%) | 2.338 | 0.582 | 0.888 | 4.561 |
| Copper | Cu (ppm) | 10.780 | 0.989 | 5.902 | 14.497 |
| Iron | Fe (wt%) | 1.611 | 0.279 | 0.849 | 2.917 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 1.069 | 0.504 | 0.181 | 2.447 |
| Manganese | Mn (ppm) | 465.524 | 106.560 | 212.788 | 827.832 |
| Sodium | Na (wt%) | 0.871 | 0.125 | 0.611 | 1.154 |
| Phosphorus | P (wt%) | 0.040 | 0.006 | 0.021 | 0.054 |
| Lead | Pb (ppm) | 23.370 | 3.204 | 13.991 | 32.957 |
| Selenium | Se (ppm) | 0.173 | 0.084 | 0.100 | 0.497 |
| Titanium | Ti (wt%) | 0.294 | 0.076 | 0.188 | 0.608 |
| Zinc | Zn (ppm) | 27.671 | 4.070 | 16.301 | 40.989 |