| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.083 | 0.754 | 4.666 | 7.035 |
| Arsenic | As (ppm) | 9.293 | 2.292 | 4.704 | 12.350 |
| Calcium | Ca (wt%) | 0.342 | 0.071 | 0.192 | 0.470 |
| Copper | Cu (ppm) | 16.616 | 6.312 | 4.013 | 26.033 |
| Iron | Fe (wt%) | 2.705 | 0.738 | 1.261 | 3.591 |
| Mercury | Hg (ppm) | 0.030 | 0.009 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.541 | 0.125 | 0.296 | 0.717 |
| Manganese | Mn (ppm) | 286.109 | 78.640 | 119.195 | 425.756 |
| Sodium | Na (wt%) | 0.797 | 0.044 | 0.673 | 0.859 |
| Phosphorus | P (wt%) | 0.028 | 0.008 | 0.015 | 0.040 |
| Lead | Pb (ppm) | 16.901 | 2.670 | 11.004 | 20.157 |
| Selenium | Se (ppm) | 0.225 | 0.078 | 0.100 | 0.400 |
| Titanium | Ti (wt%) | 0.358 | 0.015 | 0.330 | 0.381 |
| Zinc | Zn (ppm) | 73.045 | 10.585 | 50.022 | 85.173 |