| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.534 | 0.494 | 1.141 | 3.777 |
| Arsenic | As (ppm) | 5.345 | 1.772 | 2.109 | 10.913 |
| Calcium | Ca (wt%) | 0.506 | 0.203 | 0.126 | 1.096 |
| Copper | Cu (ppm) | 8.373 | 1.164 | 5.561 | 11.454 |
| Iron | Fe (wt%) | 1.460 | 0.263 | 0.711 | 2.134 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.015 |
| Magnesium | Mg (wt%) | 0.269 | 0.049 | 0.116 | 0.376 |
| Manganese | Mn (ppm) | 451.506 | 148.100 | 140.909 | 876.681 |
| Sodium | Na (wt%) | 0.268 | 0.050 | 0.118 | 0.432 |
| Phosphorus | P (wt%) | 0.017 | 0.004 | 0.010 | 0.031 |
| Lead | Pb (ppm) | 13.655 | 3.632 | 5.442 | 22.778 |
| Selenium | Se (ppm) | 0.151 | 0.031 | 0.102 | 0.282 |
| Titanium | Ti (wt%) | 0.241 | 0.051 | 0.133 | 0.417 |
| Zinc | Zn (ppm) | 22.895 | 4.509 | 11.569 | 34.911 |