| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.965 | 0.622 | 4.610 | 7.571 |
| Arsenic | As (ppm) | 9.389 | 1.534 | 7.103 | 13.856 |
| Calcium | Ca (wt%) | 0.476 | 0.089 | 0.205 | 0.645 |
| Copper | Cu (ppm) | 17.848 | 4.060 | 9.015 | 32.399 |
| Iron | Fe (wt%) | 2.352 | 0.484 | 1.202 | 3.536 |
| Mercury | Hg (ppm) | 0.033 | 0.005 | 0.020 | 0.049 |
| Magnesium | Mg (wt%) | 0.566 | 0.114 | 0.290 | 0.898 |
| Manganese | Mn (ppm) | 558.058 | 95.695 | 316.325 | 752.226 |
| Sodium | Na (wt%) | 0.754 | 0.137 | 0.407 | 1.085 |
| Phosphorus | P (wt%) | 0.057 | 0.014 | 0.026 | 0.087 |
| Lead | Pb (ppm) | 17.294 | 2.866 | 12.007 | 23.705 |
| Selenium | Se (ppm) | 0.418 | 0.143 | 0.101 | 0.790 |
| Titanium | Ti (wt%) | 0.306 | 0.024 | 0.252 | 0.370 |
| Zinc | Zn (ppm) | 69.050 | 12.157 | 43.042 | 102.630 |