| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.053 | 0.466 | 3.824 | 5.911 |
| Arsenic | As (ppm) | 4.041 | 1.384 | 1.492 | 11.389 |
| Calcium | Ca (wt%) | 1.421 | 0.327 | 0.717 | 3.011 |
| Copper | Cu (ppm) | 12.393 | 2.187 | 7.103 | 23.771 |
| Iron | Fe (wt%) | 3.564 | 0.359 | 2.746 | 4.497 |
| Mercury | Hg (ppm) | 0.031 | 0.011 | 0.010 | 0.092 |
| Magnesium | Mg (wt%) | 0.603 | 0.070 | 0.453 | 0.837 |
| Manganese | Mn (ppm) | 777.489 | 92.797 | 579.760 | 1028.540 |
| Sodium | Na (wt%) | 1.560 | 0.136 | 0.949 | 1.958 |
| Phosphorus | P (wt%) | 0.102 | 0.014 | 0.073 | 0.164 |
| Lead | Pb (ppm) | 28.021 | 5.536 | 19.532 | 62.071 |
| Selenium | Se (ppm) | 0.131 | 0.029 | 0.100 | 0.287 |
| Titanium | Ti (wt%) | 0.863 | 0.106 | 0.642 | 1.123 |
| Zinc | Zn (ppm) | 50.121 | 5.931 | 38.760 | 75.776 |