| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.536 | 0.716 | 0.701 | 4.412 |
| Arsenic | As (ppm) | 3.107 | 1.099 | 0.964 | 8.671 |
| Calcium | Ca (wt%) | 0.149 | 0.062 | 0.032 | 0.335 |
| Copper | Cu (ppm) | 4.757 | 1.514 | 1.327 | 8.815 |
| Iron | Fe (wt%) | 1.130 | 0.310 | 0.457 | 1.957 |
| Mercury | Hg (ppm) | 0.014 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.151 | 0.064 | 0.034 | 0.385 |
| Manganese | Mn (ppm) | 209.029 | 95.666 | 81.220 | 671.399 |
| Sodium | Na (wt%) | 0.398 | 0.122 | 0.046 | 0.756 |
| Phosphorus | P (wt%) | 0.019 | 0.005 | 0.007 | 0.038 |
| Lead | Pb (ppm) | 6.869 | 0.994 | 2.302 | 10.653 |
| Selenium | Se (ppm) | 0.227 | 0.074 | 0.101 | 0.400 |
| Titanium | Ti (wt%) | 0.282 | 0.031 | 0.182 | 0.373 |
| Zinc | Zn (ppm) | 24.148 | 5.748 | 8.747 | 37.349 |