| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.577 | 0.859 | 5.182 | 9.312 |
| Arsenic | As (ppm) | 28.714 | 15.049 | 6.492 | 87.669 |
| Calcium | Ca (wt%) | 2.252 | 1.001 | 0.837 | 5.638 |
| Copper | Cu (ppm) | 49.083 | 26.392 | 9.783 | 137.648 |
| Iron | Fe (wt%) | 2.631 | 0.886 | 1.492 | 6.923 |
| Mercury | Hg (ppm) | 0.066 | 0.031 | 0.012 | 0.166 |
| Magnesium | Mg (wt%) | 1.182 | 0.610 | 0.391 | 2.842 |
| Manganese | Mn (ppm) | 723.813 | 183.847 | 409.694 | 1412.300 |
| Sodium | Na (wt%) | 1.293 | 0.227 | 0.651 | 1.941 |
| Phosphorus | P (wt%) | 0.061 | 0.024 | 0.026 | 0.150 |
| Lead | Pb (ppm) | 30.888 | 10.180 | 11.771 | 68.384 |
| Selenium | Se (ppm) | 0.287 | 0.119 | 0.102 | 0.598 |
| Titanium | Ti (wt%) | 0.276 | 0.053 | 0.189 | 0.477 |
| Zinc | Zn (ppm) | 93.709 | 30.494 | 39.846 | 167.872 |