| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.667 | 0.618 | 2.529 | 6.833 |
| Arsenic | As (ppm) | 4.455 | 0.707 | 2.515 | 7.317 |
| Calcium | Ca (wt%) | 0.368 | 0.224 | 0.154 | 1.559 |
| Copper | Cu (ppm) | 14.074 | 5.102 | 7.078 | 35.934 |
| Iron | Fe (wt%) | 1.831 | 0.358 | 0.933 | 3.408 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.380 | 0.239 | 0.161 | 1.778 |
| Manganese | Mn (ppm) | 343.449 | 69.944 | 195.663 | 642.751 |
| Sodium | Na (wt%) | 0.417 | 0.116 | 0.182 | 0.747 |
| Phosphorus | P (wt%) | 0.024 | 0.005 | 0.015 | 0.048 |
| Lead | Pb (ppm) | 16.858 | 4.511 | 6.438 | 31.616 |
| Selenium | Se (ppm) | 0.170 | 0.040 | 0.102 | 0.300 |
| Titanium | Ti (wt%) | 0.230 | 0.029 | 0.172 | 0.337 |
| Zinc | Zn (ppm) | 34.692 | 6.815 | 18.398 | 67.303 |