| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.587 | 0.718 | 1.978 | 5.590 |
| Arsenic | As (ppm) | 1.064 | 0.229 | 0.614 | 1.892 |
| Calcium | Ca (wt%) | 1.349 | 0.413 | 0.805 | 2.845 |
| Copper | Cu (ppm) | 7.508 | 2.930 | 1.050 | 15.118 |
| Iron | Fe (wt%) | 2.710 | 0.809 | 1.389 | 5.220 |
| Mercury | Hg (ppm) | 0.025 | 0.022 | 0.010 | 0.143 |
| Magnesium | Mg (wt%) | 0.296 | 0.204 | 0.061 | 1.237 |
| Manganese | Mn (ppm) | 946.387 | 168.599 | 535.416 | 1326.110 |
| Sodium | Na (wt%) | 0.582 | 0.153 | 0.198 | 0.950 |
| Phosphorus | P (wt%) | 0.017 | 0.008 | 0.003 | 0.053 |
| Lead | Pb (ppm) | 16.587 | 4.427 | 8.086 | 32.639 |
| Selenium | Se (ppm) | 0.115 | 0.036 | 0.100 | 0.336 |
| Titanium | Ti (wt%) | 0.458 | 0.115 | 0.238 | 0.815 |
| Zinc | Zn (ppm) | 23.991 | 5.385 | 10.606 | 38.753 |