| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.556 | 0.173 | 0.189 | 1.458 |
| Arsenic | As (ppm) | 1.756 | 0.334 | 0.832 | 3.507 |
| Calcium | Ca (wt%) | 0.027 | 0.009 | 0.010 | 0.081 |
| Copper | Cu (ppm) | 2.872 | 0.568 | 1.252 | 5.434 |
| Iron | Fe (wt%) | 0.324 | 0.075 | 0.154 | 0.655 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.019 |
| Magnesium | Mg (wt%) | 0.021 | 0.007 | 0.008 | 0.055 |
| Manganese | Mn (ppm) | 113.050 | 40.399 | 48.924 | 260.931 |
| Sodium | Na (wt%) | 0.019 | 0.007 | 0.004 | 0.044 |
| Phosphorus | P (wt%) | 0.007 | 0.001 | 0.003 | 0.013 |
| Lead | Pb (ppm) | 11.754 | 1.958 | 6.709 | 22.335 |
| Selenium | Se (ppm) | 0.128 | 0.031 | 0.100 | 0.271 |
| Titanium | Ti (wt%) | 0.342 | 0.071 | 0.157 | 0.576 |
| Zinc | Zn (ppm) | 12.190 | 6.315 | 4.680 | 55.516 |