| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.544 | 0.704 | 1.654 | 5.928 |
| Arsenic | As (ppm) | 12.013 | 4.141 | 3.348 | 24.279 |
| Calcium | Ca (wt%) | 10.000 | 4.626 | 0.948 | 23.021 |
| Copper | Cu (ppm) | 14.018 | 4.112 | 5.289 | 26.746 |
| Iron | Fe (wt%) | 1.915 | 0.389 | 0.960 | 2.952 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.375 | 0.091 | 0.105 | 0.734 |
| Manganese | Mn (ppm) | 804.174 | 454.968 | 129.114 | 4146.200 |
| Sodium | Na (wt%) | 0.152 | 0.082 | 0.038 | 0.424 |
| Phosphorus | P (wt%) | 0.040 | 0.011 | 0.017 | 0.076 |
| Lead | Pb (ppm) | 25.905 | 9.869 | 7.496 | 80.217 |
| Selenium | Se (ppm) | 0.417 | 0.137 | 0.109 | 0.935 |
| Titanium | Ti (wt%) | 0.218 | 0.033 | 0.112 | 0.309 |
| Zinc | Zn (ppm) | 42.938 | 11.288 | 17.865 | 77.793 |