| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.181 | 0.830 | 0.516 | 4.779 |
| Arsenic | As (ppm) | 2.358 | 0.928 | 0.533 | 6.875 |
| Calcium | Ca (wt%) | 0.206 | 0.224 | 0.010 | 1.393 |
| Copper | Cu (ppm) | 4.751 | 1.343 | 1.460 | 8.772 |
| Iron | Fe (wt%) | 1.166 | 0.414 | 0.302 | 2.134 |
| Mercury | Hg (ppm) | 0.025 | 0.007 | 0.011 | 0.051 |
| Magnesium | Mg (wt%) | 0.050 | 0.033 | 0.009 | 0.191 |
| Manganese | Mn (ppm) | 217.418 | 161.508 | 53.998 | 884.503 |
| Sodium | Na (wt%) | 0.235 | 0.269 | 0.005 | 1.345 |
| Phosphorus | P (wt%) | 0.024 | 0.012 | 0.007 | 0.075 |
| Lead | Pb (ppm) | 18.564 | 4.579 | 8.560 | 36.435 |
| Selenium | Se (ppm) | 0.266 | 0.185 | 0.102 | 1.475 |
| Titanium | Ti (wt%) | 0.523 | 0.123 | 0.265 | 0.965 |
| Zinc | Zn (ppm) | 13.380 | 4.330 | 5.840 | 27.683 |