| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.381 | 0.474 | 0.277 | 3.469 |
| Arsenic | As (ppm) | 3.614 | 1.432 | 1.690 | 18.503 |
| Calcium | Ca (wt%) | 0.071 | 0.029 | 0.020 | 0.207 |
| Copper | Cu (ppm) | 5.467 | 1.201 | 2.678 | 12.672 |
| Iron | Fe (wt%) | 0.687 | 0.209 | 0.200 | 1.561 |
| Mercury | Hg (ppm) | 0.051 | 0.022 | 0.016 | 0.232 |
| Magnesium | Mg (wt%) | 0.036 | 0.012 | 0.011 | 0.085 |
| Manganese | Mn (ppm) | 143.192 | 38.097 | 58.332 | 288.103 |
| Sodium | Na (wt%) | 0.035 | 0.023 | 0.006 | 0.131 |
| Phosphorus | P (wt%) | 0.033 | 0.018 | 0.009 | 0.183 |
| Lead | Pb (ppm) | 15.363 | 3.772 | 4.372 | 38.152 |
| Selenium | Se (ppm) | 0.326 | 0.131 | 0.103 | 1.210 |
| Titanium | Ti (wt%) | 0.555 | 0.077 | 0.279 | 0.822 |
| Zinc | Zn (ppm) | 19.676 | 10.186 | 7.354 | 94.837 |