| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.373 | 0.443 | 4.352 | 6.804 |
| Arsenic | As (ppm) | 6.593 | 1.257 | 4.006 | 9.611 |
| Calcium | Ca (wt%) | 0.878 | 0.365 | 0.146 | 2.353 |
| Copper | Cu (ppm) | 11.070 | 3.963 | 1.472 | 22.753 |
| Iron | Fe (wt%) | 3.121 | 0.282 | 2.172 | 4.057 |
| Mercury | Hg (ppm) | 0.049 | 0.007 | 0.040 | 0.072 |
| Magnesium | Mg (wt%) | 0.671 | 0.076 | 0.400 | 0.920 |
| Manganese | Mn (ppm) | 602.254 | 108.114 | 209.579 | 824.099 |
| Sodium | Na (wt%) | 0.673 | 0.051 | 0.469 | 0.752 |
| Phosphorus | P (wt%) | 0.055 | 0.003 | 0.045 | 0.061 |
| Lead | Pb (ppm) | 25.579 | 9.664 | 14.965 | 70.731 |
| Selenium | Se (ppm) | 0.224 | 0.048 | 0.104 | 0.338 |
| Titanium | Ti (wt%) | 0.361 | 0.053 | 0.226 | 0.471 |
| Zinc | Zn (ppm) | 91.358 | 45.630 | 59.692 | 311.517 |