| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.185 | 0.517 | 3.163 | 6.202 |
| Arsenic | As (ppm) | 2.036 | 1.058 | 0.367 | 6.655 |
| Calcium | Ca (wt%) | 0.712 | 0.192 | 0.344 | 1.106 |
| Copper | Cu (ppm) | 7.740 | 2.073 | 3.588 | 17.205 |
| Iron | Fe (wt%) | 1.329 | 0.419 | 0.312 | 2.417 |
| Mercury | Hg (ppm) | 0.067 | 0.019 | 0.033 | 0.145 |
| Magnesium | Mg (wt%) | 0.199 | 0.073 | 0.073 | 0.370 |
| Manganese | Mn (ppm) | 483.119 | 104.151 | 176.386 | 793.665 |
| Sodium | Na (wt%) | 1.401 | 0.193 | 1.089 | 2.449 |
| Phosphorus | P (wt%) | 0.033 | 0.008 | 0.012 | 0.063 |
| Lead | Pb (ppm) | 38.839 | 16.938 | 18.244 | 183.953 |
| Selenium | Se (ppm) | 0.284 | 0.122 | 0.103 | 0.686 |
| Titanium | Ti (wt%) | 0.462 | 0.092 | 0.187 | 0.712 |
| Zinc | Zn (ppm) | 30.186 | 10.348 | 9.576 | 60.010 |