| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.877 | 0.522 | 1.920 | 4.372 |
| Arsenic | As (ppm) | 4.302 | 1.156 | 0.988 | 8.072 |
| Calcium | Ca (wt%) | 20.178 | 2.273 | 12.524 | 25.289 |
| Copper | Cu (ppm) | 14.843 | 3.602 | 7.208 | 23.826 |
| Iron | Fe (wt%) | 1.296 | 0.261 | 0.906 | 2.041 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.776 | 0.253 | 0.489 | 2.064 |
| Manganese | Mn (ppm) | 287.407 | 48.481 | 203.921 | 424.690 |
| Sodium | Na (wt%) | 0.074 | 0.010 | 0.039 | 0.115 |
| Phosphorus | P (wt%) | 0.032 | 0.006 | 0.018 | 0.050 |
| Lead | Pb (ppm) | 20.282 | 8.898 | 2.375 | 46.903 |
| Selenium | Se (ppm) | 0.472 | 0.174 | 0.112 | 1.228 |
| Titanium | Ti (wt%) | 0.161 | 0.033 | 0.105 | 0.256 |
| Zinc | Zn (ppm) | 31.471 | 8.074 | 12.631 | 49.044 |