| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.002 | 0.711 | 4.904 | 7.934 |
| Arsenic | As (ppm) | 9.720 | 1.907 | 3.161 | 14.263 |
| Calcium | Ca (wt%) | 0.317 | 0.125 | 0.166 | 0.845 |
| Copper | Cu (ppm) | 20.262 | 4.909 | 9.330 | 37.959 |
| Iron | Fe (wt%) | 2.909 | 0.526 | 1.920 | 4.441 |
| Mercury | Hg (ppm) | 0.048 | 0.022 | 0.030 | 0.137 |
| Magnesium | Mg (wt%) | 0.528 | 0.090 | 0.378 | 0.750 |
| Manganese | Mn (ppm) | 268.038 | 65.616 | 157.511 | 457.074 |
| Sodium | Na (wt%) | 0.735 | 0.062 | 0.659 | 0.925 |
| Phosphorus | P (wt%) | 0.028 | 0.010 | 0.015 | 0.061 |
| Lead | Pb (ppm) | 17.723 | 1.990 | 14.169 | 23.852 |
| Selenium | Se (ppm) | 0.325 | 0.076 | 0.201 | 0.496 |
| Titanium | Ti (wt%) | 0.391 | 0.017 | 0.336 | 0.441 |
| Zinc | Zn (ppm) | 74.734 | 9.433 | 54.003 | 94.541 |