| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.308 | 0.233 | 0.031 | 2.436 |
| Arsenic | As (ppm) | 1.260 | 0.760 | 0.349 | 10.060 |
| Calcium | Ca (wt%) | 0.156 | 0.151 | 0.009 | 1.663 |
| Copper | Cu (ppm) | 32.925 | 52.760 | 1.014 | 542.248 |
| Iron | Fe (wt%) | 0.164 | 0.106 | 0.003 | 0.724 |
| Mercury | Hg (ppm) | 0.017 | 0.009 | 0.010 | 0.091 |
| Magnesium | Mg (wt%) | 0.016 | 0.011 | 0.003 | 0.086 |
| Manganese | Mn (ppm) | 79.975 | 90.791 | 2.188 | 972.201 |
| Sodium | Na (wt%) | 0.004 | 0.001 | 0.003 | 0.011 |
| Phosphorus | P (wt%) | 0.042 | 0.040 | 0.003 | 0.258 |
| Lead | Pb (ppm) | 16.480 | 11.069 | 2.631 | 118.073 |
| Selenium | Se (ppm) | 0.160 | 0.080 | 0.100 | 0.910 |
| Titanium | Ti (wt%) | 0.314 | 0.097 | 0.082 | 0.957 |
| Zinc | Zn (ppm) | 22.291 | 32.113 | 1.249 | 366.651 |