| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.998 | 0.394 | 0.510 | 2.713 |
| Arsenic | As (ppm) | 5.213 | 3.825 | 1.567 | 21.411 |
| Calcium | Ca (wt%) | 0.647 | 0.828 | 0.022 | 4.192 |
| Copper | Cu (ppm) | 2.578 | 1.359 | 1.034 | 7.504 |
| Iron | Fe (wt%) | 1.859 | 0.558 | 0.763 | 3.424 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.069 | 0.031 | 0.031 | 0.189 |
| Manganese | Mn (ppm) | 532.676 | 201.016 | 178.704 | 1227.360 |
| Sodium | Na (wt%) | 0.046 | 0.013 | 0.019 | 0.094 |
| Phosphorus | P (wt%) | 0.019 | 0.016 | 0.003 | 0.083 |
| Lead | Pb (ppm) | 23.941 | 5.766 | 10.945 | 48.122 |
| Selenium | Se (ppm) | 0.109 | 0.016 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.582 | 0.153 | 0.333 | 1.300 |
| Zinc | Zn (ppm) | 24.408 | 6.532 | 8.822 | 43.620 |