| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.272 | 0.680 | 3.637 | 6.776 |
| Arsenic | As (ppm) | 13.636 | 1.121 | 10.904 | 16.694 |
| Calcium | Ca (wt%) | 0.855 | 0.429 | 0.208 | 1.849 |
| Copper | Cu (ppm) | 15.301 | 3.728 | 10.299 | 27.900 |
| Iron | Fe (wt%) | 3.649 | 0.391 | 2.376 | 4.588 |
| Mercury | Hg (ppm) | 0.033 | 0.007 | 0.011 | 0.059 |
| Magnesium | Mg (wt%) | 0.589 | 0.134 | 0.366 | 0.835 |
| Manganese | Mn (ppm) | 605.087 | 110.738 | 281.617 | 909.508 |
| Sodium | Na (wt%) | 0.603 | 0.072 | 0.412 | 0.725 |
| Phosphorus | P (wt%) | 0.046 | 0.006 | 0.035 | 0.061 |
| Lead | Pb (ppm) | 19.315 | 1.383 | 15.279 | 23.409 |
| Selenium | Se (ppm) | 0.338 | 0.046 | 0.254 | 0.492 |
| Titanium | Ti (wt%) | 0.483 | 0.086 | 0.335 | 0.853 |
| Zinc | Zn (ppm) | 84.360 | 7.089 | 62.469 | 117.174 |