| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.276 | 0.532 | 2.347 | 5.695 |
| Arsenic | As (ppm) | 8.297 | 1.129 | 5.952 | 11.403 |
| Calcium | Ca (wt%) | 8.431 | 2.457 | 1.606 | 16.840 |
| Copper | Cu (ppm) | 15.922 | 1.496 | 12.895 | 19.930 |
| Iron | Fe (wt%) | 1.890 | 0.242 | 1.057 | 2.647 |
| Mercury | Hg (ppm) | 0.052 | 0.019 | 0.012 | 0.146 |
| Magnesium | Mg (wt%) | 0.626 | 0.071 | 0.367 | 0.923 |
| Manganese | Mn (ppm) | 457.270 | 68.506 | 250.330 | 666.376 |
| Sodium | Na (wt%) | 0.232 | 0.036 | 0.163 | 0.334 |
| Phosphorus | P (wt%) | 0.069 | 0.008 | 0.048 | 0.090 |
| Lead | Pb (ppm) | 17.788 | 1.442 | 13.163 | 21.981 |
| Selenium | Se (ppm) | 0.379 | 0.070 | 0.107 | 0.500 |
| Titanium | Ti (wt%) | 0.256 | 0.029 | 0.161 | 0.311 |
| Zinc | Zn (ppm) | 68.695 | 8.917 | 44.948 | 98.011 |