| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.561 | 0.516 | 2.982 | 5.716 |
| Arsenic | As (ppm) | 4.814 | 0.903 | 1.958 | 7.357 |
| Calcium | Ca (wt%) | 2.638 | 1.242 | 0.584 | 7.410 |
| Copper | Cu (ppm) | 11.118 | 1.900 | 6.239 | 16.789 |
| Iron | Fe (wt%) | 1.958 | 0.340 | 0.910 | 3.071 |
| Mercury | Hg (ppm) | 0.012 | 0.004 | 0.010 | 0.031 |
| Magnesium | Mg (wt%) | 0.472 | 0.094 | 0.212 | 0.744 |
| Manganese | Mn (ppm) | 360.410 | 73.733 | 184.676 | 644.532 |
| Sodium | Na (wt%) | 0.637 | 0.059 | 0.421 | 0.755 |
| Phosphorus | P (wt%) | 0.040 | 0.009 | 0.021 | 0.067 |
| Lead | Pb (ppm) | 19.598 | 2.006 | 13.336 | 24.306 |
| Selenium | Se (ppm) | 0.218 | 0.061 | 0.103 | 0.487 |
| Titanium | Ti (wt%) | 0.252 | 0.042 | 0.156 | 0.396 |
| Zinc | Zn (ppm) | 44.866 | 10.330 | 23.036 | 81.566 |