| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.095 | 0.946 | 2.886 | 9.413 |
| Arsenic | As (ppm) | 4.617 | 1.292 | 1.394 | 12.714 |
| Calcium | Ca (wt%) | 1.694 | 0.843 | 0.349 | 4.605 |
| Copper | Cu (ppm) | 13.141 | 3.814 | 4.165 | 29.984 |
| Iron | Fe (wt%) | 2.242 | 0.488 | 0.898 | 3.512 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.056 |
| Magnesium | Mg (wt%) | 0.640 | 0.211 | 0.249 | 1.425 |
| Manganese | Mn (ppm) | 393.178 | 106.658 | 97.217 | 826.171 |
| Sodium | Na (wt%) | 0.718 | 0.187 | 0.279 | 1.268 |
| Phosphorus | P (wt%) | 0.042 | 0.009 | 0.016 | 0.074 |
| Lead | Pb (ppm) | 18.862 | 2.542 | 11.351 | 29.718 |
| Selenium | Se (ppm) | 0.189 | 0.090 | 0.100 | 0.713 |
| Titanium | Ti (wt%) | 0.314 | 0.068 | 0.131 | 0.526 |
| Zinc | Zn (ppm) | 44.300 | 9.289 | 13.228 | 72.969 |