| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.788 | 0.274 | 4.202 | 5.461 |
| Arsenic | As (ppm) | 5.562 | 0.590 | 3.415 | 6.175 |
| Calcium | Ca (wt%) | 3.170 | 0.941 | 1.107 | 4.638 |
| Copper | Cu (ppm) | 16.541 | 1.906 | 9.580 | 19.868 |
| Iron | Fe (wt%) | 1.903 | 0.212 | 1.167 | 2.416 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.599 | 0.084 | 0.464 | 0.926 |
| Manganese | Mn (ppm) | 465.070 | 95.009 | 332.044 | 674.150 |
| Sodium | Na (wt%) | 0.835 | 0.114 | 0.654 | 1.063 |
| Phosphorus | P (wt%) | 0.044 | 0.004 | 0.034 | 0.053 |
| Lead | Pb (ppm) | 18.405 | 7.752 | 10.057 | 34.051 |
| Selenium | Se (ppm) | 0.134 | 0.027 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.218 | 0.014 | 0.188 | 0.263 |
| Zinc | Zn (ppm) | 37.065 | 2.628 | 30.986 | 45.353 |