| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.277 | 0.499 | 0.117 | 3.297 |
| Arsenic | As (ppm) | 1.825 | 0.532 | 0.644 | 4.857 |
| Calcium | Ca (wt%) | 0.047 | 0.032 | 0.003 | 0.136 |
| Copper | Cu (ppm) | 2.218 | 0.707 | 1.006 | 3.853 |
| Iron | Fe (wt%) | 0.664 | 0.266 | 0.132 | 2.415 |
| Mercury | Hg (ppm) | 0.019 | 0.007 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.035 | 0.022 | 0.003 | 0.155 |
| Manganese | Mn (ppm) | 103.521 | 41.957 | 31.258 | 211.654 |
| Sodium | Na (wt%) | 0.009 | 0.032 | 0.003 | 0.370 |
| Phosphorus | P (wt%) | 0.025 | 0.013 | 0.003 | 0.051 |
| Lead | Pb (ppm) | 10.360 | 1.943 | 3.619 | 18.653 |
| Selenium | Se (ppm) | 0.179 | 0.065 | 0.100 | 0.579 |
| Titanium | Ti (wt%) | 0.306 | 0.042 | 0.110 | 0.444 |
| Zinc | Zn (ppm) | 10.166 | 2.432 | 3.212 | 16.096 |