| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.515 | 0.354 | 3.792 | 5.264 |
| Arsenic | As (ppm) | 3.014 | 1.138 | 1.501 | 6.537 |
| Calcium | Ca (wt%) | 4.018 | 1.268 | 1.189 | 7.452 |
| Copper | Cu (ppm) | 10.177 | 4.322 | 2.308 | 18.808 |
| Iron | Fe (wt%) | 2.829 | 0.361 | 1.754 | 3.616 |
| Mercury | Hg (ppm) | 0.026 | 0.006 | 0.011 | 0.047 |
| Magnesium | Mg (wt%) | 1.286 | 0.300 | 0.509 | 2.164 |
| Manganese | Mn (ppm) | 634.526 | 52.901 | 427.183 | 765.368 |
| Sodium | Na (wt%) | 1.049 | 0.114 | 0.824 | 1.308 |
| Phosphorus | P (wt%) | 0.061 | 0.005 | 0.052 | 0.072 |
| Lead | Pb (ppm) | 18.091 | 3.219 | 13.375 | 31.759 |
| Selenium | Se (ppm) | 0.187 | 0.050 | 0.104 | 0.292 |
| Titanium | Ti (wt%) | 0.521 | 0.079 | 0.365 | 0.750 |
| Zinc | Zn (ppm) | 70.492 | 7.122 | 47.871 | 84.441 |