| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.563 | 0.446 | 1.759 | 4.048 |
| Arsenic | As (ppm) | 1.109 | 0.354 | 0.606 | 2.234 |
| Calcium | Ca (wt%) | 0.128 | 0.030 | 0.032 | 0.225 |
| Copper | Cu (ppm) | 5.353 | 1.305 | 1.048 | 7.565 |
| Iron | Fe (wt%) | 4.875 | 2.673 | 1.573 | 14.216 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.011 | 0.040 |
| Magnesium | Mg (wt%) | 0.215 | 0.045 | 0.123 | 0.383 |
| Manganese | Mn (ppm) | 813.191 | 357.520 | 210.954 | 1989.420 |
| Sodium | Na (wt%) | 0.121 | 0.057 | 0.036 | 0.339 |
| Phosphorus | P (wt%) | 0.022 | 0.015 | 0.006 | 0.067 |
| Lead | Pb (ppm) | 30.179 | 15.762 | 10.748 | 86.476 |
| Selenium | Se (ppm) | 0.116 | 0.021 | 0.100 | 0.218 |
| Titanium | Ti (wt%) | 0.825 | 0.164 | 0.518 | 1.216 |
| Zinc | Zn (ppm) | 82.253 | 42.904 | 20.537 | 228.682 |