| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.649 | 0.520 | 2.365 | 4.889 |
| Arsenic | As (ppm) | 5.870 | 1.675 | 2.428 | 10.879 |
| Calcium | Ca (wt%) | 0.142 | 0.039 | 0.088 | 0.302 |
| Copper | Cu (ppm) | 6.521 | 2.535 | 3.269 | 19.034 |
| Iron | Fe (wt%) | 2.038 | 0.335 | 1.150 | 3.023 |
| Mercury | Hg (ppm) | 0.051 | 0.011 | 0.031 | 0.097 |
| Magnesium | Mg (wt%) | 0.337 | 0.056 | 0.205 | 0.512 |
| Manganese | Mn (ppm) | 1313.990 | 825.152 | 410.180 | 4704.850 |
| Sodium | Na (wt%) | 0.525 | 0.125 | 0.224 | 0.806 |
| Phosphorus | P (wt%) | 0.051 | 0.011 | 0.029 | 0.095 |
| Lead | Pb (ppm) | 24.376 | 6.551 | 14.139 | 49.788 |
| Selenium | Se (ppm) | 0.270 | 0.082 | 0.103 | 0.579 |
| Titanium | Ti (wt%) | 0.285 | 0.045 | 0.189 | 0.408 |
| Zinc | Zn (ppm) | 82.833 | 23.431 | 49.085 | 163.689 |