| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.698 | 0.303 | 0.169 | 2.269 |
| Arsenic | As (ppm) | 1.663 | 0.431 | 0.859 | 3.630 |
| Calcium | Ca (wt%) | 0.031 | 0.014 | 0.011 | 0.113 |
| Copper | Cu (ppm) | 2.528 | 0.999 | 1.004 | 6.613 |
| Iron | Fe (wt%) | 0.416 | 0.149 | 0.108 | 1.203 |
| Mercury | Hg (ppm) | 0.013 | 0.006 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.031 | 0.013 | 0.009 | 0.101 |
| Manganese | Mn (ppm) | 199.854 | 91.264 | 35.908 | 619.120 |
| Sodium | Na (wt%) | 0.058 | 0.036 | 0.011 | 0.245 |
| Phosphorus | P (wt%) | 0.009 | 0.004 | 0.003 | 0.029 |
| Lead | Pb (ppm) | 7.755 | 2.168 | 2.312 | 20.746 |
| Selenium | Se (ppm) | 0.142 | 0.072 | 0.100 | 0.605 |
| Titanium | Ti (wt%) | 0.186 | 0.058 | 0.055 | 0.485 |
| Zinc | Zn (ppm) | 10.065 | 3.734 | 3.257 | 30.089 |