| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.584 | 0.612 | 1.345 | 5.761 |
| Arsenic | As (ppm) | 7.745 | 2.125 | 2.991 | 15.246 |
| Calcium | Ca (wt%) | 12.393 | 7.703 | 0.173 | 30.751 |
| Copper | Cu (ppm) | 15.084 | 5.915 | 3.550 | 40.122 |
| Iron | Fe (wt%) | 1.625 | 0.300 | 0.588 | 2.775 |
| Mercury | Hg (ppm) | 0.024 | 0.013 | 0.010 | 0.095 |
| Magnesium | Mg (wt%) | 0.409 | 0.139 | 0.089 | 0.962 |
| Manganese | Mn (ppm) | 335.326 | 95.239 | 122.260 | 655.708 |
| Sodium | Na (wt%) | 0.135 | 0.070 | 0.028 | 0.394 |
| Phosphorus | P (wt%) | 0.049 | 0.021 | 0.013 | 0.112 |
| Lead | Pb (ppm) | 27.670 | 11.423 | 8.304 | 80.349 |
| Selenium | Se (ppm) | 0.377 | 0.116 | 0.129 | 0.767 |
| Titanium | Ti (wt%) | 0.223 | 0.040 | 0.071 | 0.357 |
| Zinc | Zn (ppm) | 47.011 | 10.793 | 15.399 | 74.938 |