| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.510 | 0.317 | 5.762 | 8.103 |
| Arsenic | As (ppm) | 3.951 | 0.963 | 1.529 | 8.355 |
| Calcium | Ca (wt%) | 2.287 | 0.532 | 0.407 | 4.772 |
| Copper | Cu (ppm) | 26.224 | 8.290 | 18.326 | 70.523 |
| Iron | Fe (wt%) | 5.112 | 0.620 | 3.583 | 7.697 |
| Mercury | Hg (ppm) | 0.021 | 0.013 | 0.010 | 0.089 |
| Magnesium | Mg (wt%) | 1.095 | 0.146 | 0.775 | 1.632 |
| Manganese | Mn (ppm) | 825.719 | 67.319 | 636.572 | 1002.260 |
| Sodium | Na (wt%) | 1.854 | 0.184 | 1.058 | 2.297 |
| Phosphorus | P (wt%) | 0.096 | 0.012 | 0.069 | 0.174 |
| Lead | Pb (ppm) | 13.365 | 1.444 | 5.450 | 17.952 |
| Selenium | Se (ppm) | 0.120 | 0.033 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.713 | 0.111 | 0.464 | 1.067 |
| Zinc | Zn (ppm) | 93.863 | 10.980 | 72.281 | 145.316 |