| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.814 | 0.490 | 1.177 | 4.341 |
| Arsenic | As (ppm) | 5.813 | 2.816 | 1.255 | 16.570 |
| Calcium | Ca (wt%) | 0.453 | 0.284 | 0.061 | 1.762 |
| Copper | Cu (ppm) | 3.739 | 0.977 | 1.056 | 6.990 |
| Iron | Fe (wt%) | 1.596 | 0.591 | 0.545 | 3.815 |
| Mercury | Hg (ppm) | 0.021 | 0.005 | 0.010 | 0.043 |
| Magnesium | Mg (wt%) | 0.175 | 0.046 | 0.056 | 0.437 |
| Manganese | Mn (ppm) | 253.226 | 123.828 | 73.431 | 713.695 |
| Sodium | Na (wt%) | 0.300 | 0.146 | 0.091 | 0.618 |
| Phosphorus | P (wt%) | 0.020 | 0.008 | 0.010 | 0.048 |
| Lead | Pb (ppm) | 14.608 | 1.998 | 9.017 | 20.592 |
| Selenium | Se (ppm) | 0.275 | 0.066 | 0.101 | 0.448 |
| Titanium | Ti (wt%) | 0.262 | 0.010 | 0.226 | 0.293 |
| Zinc | Zn (ppm) | 32.774 | 10.393 | 12.276 | 65.758 |