| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.116 | 0.841 | 1.147 | 4.064 |
| Arsenic | As (ppm) | 3.822 | 1.158 | 1.081 | 6.044 |
| Calcium | Ca (wt%) | 1.343 | 0.863 | 0.184 | 4.560 |
| Copper | Cu (ppm) | 9.322 | 2.428 | 4.206 | 12.875 |
| Iron | Fe (wt%) | 1.253 | 0.376 | 0.344 | 1.712 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.327 | 0.128 | 0.056 | 0.520 |
| Manganese | Mn (ppm) | 240.520 | 136.368 | 74.393 | 831.527 |
| Sodium | Na (wt%) | 0.379 | 0.140 | 0.147 | 0.852 |
| Phosphorus | P (wt%) | 0.022 | 0.010 | 0.009 | 0.055 |
| Lead | Pb (ppm) | 14.574 | 4.100 | 6.161 | 25.064 |
| Selenium | Se (ppm) | 0.264 | 0.281 | 0.100 | 1.095 |
| Titanium | Ti (wt%) | 0.184 | 0.033 | 0.102 | 0.233 |
| Zinc | Zn (ppm) | 41.010 | 13.680 | 11.695 | 71.520 |