| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.872 | 1.079 | 0.376 | 5.413 |
| Arsenic | As (ppm) | 5.295 | 3.260 | 1.245 | 19.088 |
| Calcium | Ca (wt%) | 0.147 | 0.090 | 0.024 | 0.417 |
| Copper | Cu (ppm) | 5.942 | 3.188 | 1.189 | 15.933 |
| Iron | Fe (wt%) | 1.199 | 0.546 | 0.290 | 2.920 |
| Mercury | Hg (ppm) | 0.015 | 0.007 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.129 | 0.109 | 0.019 | 0.535 |
| Manganese | Mn (ppm) | 648.195 | 405.289 | 106.996 | 2713.940 |
| Sodium | Na (wt%) | 0.244 | 0.131 | 0.039 | 0.683 |
| Phosphorus | P (wt%) | 0.032 | 0.019 | 0.009 | 0.104 |
| Lead | Pb (ppm) | 13.906 | 4.933 | 3.657 | 28.727 |
| Selenium | Se (ppm) | 0.192 | 0.107 | 0.102 | 0.620 |
| Titanium | Ti (wt%) | 0.276 | 0.098 | 0.082 | 0.631 |
| Zinc | Zn (ppm) | 27.381 | 16.287 | 5.838 | 79.841 |