| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.425 | 0.894 | 0.286 | 4.887 |
| Arsenic | As (ppm) | 1.883 | 0.762 | 0.383 | 4.985 |
| Calcium | Ca (wt%) | 0.033 | 0.012 | 0.011 | 0.096 |
| Copper | Cu (ppm) | 4.211 | 1.326 | 1.051 | 7.919 |
| Iron | Fe (wt%) | 0.693 | 0.381 | 0.203 | 2.097 |
| Mercury | Hg (ppm) | 0.027 | 0.007 | 0.011 | 0.060 |
| Magnesium | Mg (wt%) | 0.028 | 0.019 | 0.006 | 0.110 |
| Manganese | Mn (ppm) | 169.751 | 73.427 | 51.465 | 609.613 |
| Sodium | Na (wt%) | 0.018 | 0.011 | 0.003 | 0.108 |
| Phosphorus | P (wt%) | 0.016 | 0.003 | 0.007 | 0.030 |
| Lead | Pb (ppm) | 14.177 | 3.473 | 8.927 | 28.933 |
| Selenium | Se (ppm) | 0.195 | 0.049 | 0.101 | 0.399 |
| Titanium | Ti (wt%) | 0.414 | 0.060 | 0.279 | 0.577 |
| Zinc | Zn (ppm) | 12.723 | 4.497 | 3.621 | 27.944 |