| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.521 | 0.618 | 1.254 | 4.989 |
| Arsenic | As (ppm) | 4.186 | 1.252 | 1.148 | 8.571 |
| Calcium | Ca (wt%) | 0.199 | 0.050 | 0.066 | 0.385 |
| Copper | Cu (ppm) | 5.562 | 2.421 | 2.184 | 20.105 |
| Iron | Fe (wt%) | 0.809 | 0.260 | 0.228 | 1.762 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.102 | 0.035 | 0.035 | 0.241 |
| Manganese | Mn (ppm) | 139.456 | 55.297 | 35.305 | 327.782 |
| Sodium | Na (wt%) | 0.400 | 0.089 | 0.152 | 0.641 |
| Phosphorus | P (wt%) | 0.011 | 0.003 | 0.006 | 0.020 |
| Lead | Pb (ppm) | 13.865 | 3.238 | 7.466 | 28.506 |
| Selenium | Se (ppm) | 0.185 | 0.088 | 0.100 | 0.555 |
| Titanium | Ti (wt%) | 0.300 | 0.063 | 0.140 | 0.521 |
| Zinc | Zn (ppm) | 16.827 | 4.156 | 5.341 | 31.090 |