| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.688 | 0.543 | 4.140 | 7.366 |
| Arsenic | As (ppm) | 9.083 | 4.080 | 2.491 | 23.989 |
| Calcium | Ca (wt%) | 1.238 | 0.379 | 0.299 | 2.616 |
| Copper | Cu (ppm) | 21.539 | 7.883 | 9.169 | 130.934 |
| Iron | Fe (wt%) | 2.216 | 0.222 | 1.566 | 2.889 |
| Mercury | Hg (ppm) | 0.050 | 0.016 | 0.018 | 0.190 |
| Magnesium | Mg (wt%) | 1.304 | 0.287 | 0.605 | 2.168 |
| Manganese | Mn (ppm) | 527.494 | 287.407 | 161.568 | 3346.020 |
| Sodium | Na (wt%) | 0.901 | 0.098 | 0.630 | 1.214 |
| Phosphorus | P (wt%) | 0.062 | 0.010 | 0.038 | 0.107 |
| Lead | Pb (ppm) | 23.959 | 4.076 | 13.127 | 38.804 |
| Selenium | Se (ppm) | 0.489 | 0.361 | 0.102 | 3.042 |
| Titanium | Ti (wt%) | 0.226 | 0.037 | 0.134 | 0.450 |
| Zinc | Zn (ppm) | 71.345 | 17.783 | 39.398 | 191.417 |