| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.268 | 0.173 | 1.565 | 2.616 |
| Arsenic | As (ppm) | 3.294 | 0.507 | 2.043 | 4.584 |
| Calcium | Ca (wt%) | 0.633 | 0.219 | 0.214 | 1.099 |
| Copper | Cu (ppm) | 6.437 | 0.391 | 5.389 | 7.328 |
| Iron | Fe (wt%) | 0.901 | 0.066 | 0.694 | 1.065 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.209 | 0.023 | 0.138 | 0.248 |
| Manganese | Mn (ppm) | 117.396 | 12.169 | 81.331 | 146.376 |
| Sodium | Na (wt%) | 0.226 | 0.030 | 0.140 | 0.313 |
| Phosphorus | P (wt%) | 0.019 | 0.007 | 0.009 | 0.040 |
| Lead | Pb (ppm) | 8.460 | 0.654 | 7.259 | 9.989 |
| Selenium | Se (ppm) | 0.106 | 0.012 | 0.100 | 0.147 |
| Titanium | Ti (wt%) | 0.149 | 0.018 | 0.101 | 0.193 |
| Zinc | Zn (ppm) | 26.379 | 2.325 | 18.300 | 31.094 |