| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.523 | 0.641 | 1.058 | 3.810 |
| Arsenic | As (ppm) | 3.368 | 0.654 | 1.554 | 5.197 |
| Calcium | Ca (wt%) | 0.177 | 0.084 | 0.067 | 0.411 |
| Copper | Cu (ppm) | 9.649 | 1.601 | 6.162 | 14.691 |
| Iron | Fe (wt%) | 0.963 | 0.241 | 0.408 | 1.531 |
| Mercury | Hg (ppm) | 0.033 | 0.014 | 0.011 | 0.077 |
| Magnesium | Mg (wt%) | 0.148 | 0.070 | 0.051 | 0.397 |
| Manganese | Mn (ppm) | 237.860 | 90.718 | 117.140 | 432.011 |
| Sodium | Na (wt%) | 0.263 | 0.083 | 0.083 | 0.462 |
| Phosphorus | P (wt%) | 0.026 | 0.011 | 0.011 | 0.056 |
| Lead | Pb (ppm) | 15.897 | 2.729 | 10.067 | 24.338 |
| Selenium | Se (ppm) | 0.469 | 0.117 | 0.108 | 0.654 |
| Titanium | Ti (wt%) | 0.288 | 0.018 | 0.213 | 0.342 |
| Zinc | Zn (ppm) | 22.560 | 6.782 | 11.430 | 43.196 |