| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.345 | 0.854 | 0.521 | 6.344 |
| Arsenic | As (ppm) | 3.349 | 0.704 | 0.355 | 6.163 |
| Calcium | Ca (wt%) | 5.081 | 3.710 | 0.639 | 22.382 |
| Copper | Cu (ppm) | 11.349 | 3.769 | 1.008 | 22.022 |
| Iron | Fe (wt%) | 2.027 | 0.744 | 0.256 | 8.257 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.863 | 0.505 | 0.248 | 5.295 |
| Manganese | Mn (ppm) | 348.828 | 119.104 | 47.114 | 979.078 |
| Sodium | Na (wt%) | 0.797 | 0.201 | 0.187 | 1.429 |
| Phosphorus | P (wt%) | 0.047 | 0.020 | 0.007 | 0.127 |
| Lead | Pb (ppm) | 20.492 | 3.938 | 5.777 | 38.527 |
| Selenium | Se (ppm) | 0.237 | 0.148 | 0.100 | 1.471 |
| Titanium | Ti (wt%) | 0.279 | 0.103 | 0.036 | 1.313 |
| Zinc | Zn (ppm) | 46.706 | 12.515 | 5.503 | 94.470 |