| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.008 | 0.315 | 3.436 | 4.762 |
| Arsenic | As (ppm) | 1.620 | 0.322 | 1.024 | 3.264 |
| Calcium | Ca (wt%) | 2.439 | 1.068 | 0.886 | 5.362 |
| Copper | Cu (ppm) | 3.662 | 1.219 | 1.217 | 7.136 |
| Iron | Fe (wt%) | 2.218 | 0.399 | 1.275 | 3.488 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.011 | 0.038 |
| Magnesium | Mg (wt%) | 1.013 | 0.429 | 0.377 | 2.541 |
| Manganese | Mn (ppm) | 511.363 | 84.286 | 314.586 | 802.581 |
| Sodium | Na (wt%) | 1.185 | 0.107 | 0.988 | 1.400 |
| Phosphorus | P (wt%) | 0.054 | 0.005 | 0.042 | 0.072 |
| Lead | Pb (ppm) | 17.224 | 3.466 | 12.432 | 29.657 |
| Selenium | Se (ppm) | 0.107 | 0.012 | 0.100 | 0.180 |
| Titanium | Ti (wt%) | 0.514 | 0.126 | 0.267 | 0.976 |
| Zinc | Zn (ppm) | 57.495 | 19.056 | 28.766 | 173.608 |