| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.856 | 0.465 | 3.554 | 8.101 |
| Arsenic | As (ppm) | 4.611 | 1.115 | 3.034 | 8.741 |
| Calcium | Ca (wt%) | 2.020 | 0.291 | 0.994 | 3.226 |
| Copper | Cu (ppm) | 14.278 | 3.878 | 1.241 | 40.710 |
| Iron | Fe (wt%) | 3.874 | 0.664 | 2.487 | 7.153 |
| Mercury | Hg (ppm) | 0.017 | 0.011 | 0.010 | 0.099 |
| Magnesium | Mg (wt%) | 0.854 | 0.112 | 0.374 | 1.334 |
| Manganese | Mn (ppm) | 655.488 | 133.940 | 417.798 | 1246.970 |
| Sodium | Na (wt%) | 1.595 | 0.143 | 0.717 | 1.817 |
| Phosphorus | P (wt%) | 0.088 | 0.015 | 0.055 | 0.161 |
| Lead | Pb (ppm) | 21.915 | 2.658 | 7.179 | 41.094 |
| Selenium | Se (ppm) | 0.117 | 0.034 | 0.100 | 0.311 |
| Titanium | Ti (wt%) | 0.578 | 0.124 | 0.337 | 1.037 |
| Zinc | Zn (ppm) | 76.399 | 18.447 | 48.376 | 187.146 |