| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.674 | 0.528 | 1.729 | 5.371 |
| Arsenic | As (ppm) | 7.004 | 1.459 | 3.144 | 12.581 |
| Calcium | Ca (wt%) | 12.316 | 6.363 | 0.424 | 29.562 |
| Copper | Cu (ppm) | 14.889 | 4.371 | 4.326 | 41.150 |
| Iron | Fe (wt%) | 1.660 | 0.257 | 0.831 | 2.427 |
| Mercury | Hg (ppm) | 0.017 | 0.005 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.494 | 0.092 | 0.095 | 0.683 |
| Manganese | Mn (ppm) | 338.245 | 62.168 | 158.866 | 573.932 |
| Sodium | Na (wt%) | 0.136 | 0.061 | 0.061 | 0.504 |
| Phosphorus | P (wt%) | 0.048 | 0.014 | 0.012 | 0.110 |
| Lead | Pb (ppm) | 21.043 | 4.253 | 8.077 | 32.317 |
| Selenium | Se (ppm) | 0.346 | 0.081 | 0.122 | 0.785 |
| Titanium | Ti (wt%) | 0.229 | 0.036 | 0.097 | 0.319 |
| Zinc | Zn (ppm) | 42.668 | 8.146 | 17.491 | 64.926 |