| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.322 | 0.399 | 4.416 | 6.382 |
| Arsenic | As (ppm) | 11.934 | 6.604 | 2.821 | 41.716 |
| Calcium | Ca (wt%) | 1.002 | 0.144 | 0.753 | 1.411 |
| Copper | Cu (ppm) | 9.702 | 2.032 | 4.818 | 16.470 |
| Iron | Fe (wt%) | 1.789 | 0.277 | 1.121 | 2.615 |
| Mercury | Hg (ppm) | 0.043 | 0.013 | 0.014 | 0.110 |
| Magnesium | Mg (wt%) | 0.277 | 0.077 | 0.155 | 0.810 |
| Manganese | Mn (ppm) | 797.919 | 158.052 | 522.735 | 1584.450 |
| Sodium | Na (wt%) | 1.671 | 0.167 | 1.394 | 2.145 |
| Phosphorus | P (wt%) | 0.062 | 0.010 | 0.031 | 0.101 |
| Lead | Pb (ppm) | 44.206 | 11.202 | 27.181 | 88.435 |
| Selenium | Se (ppm) | 0.187 | 0.046 | 0.102 | 0.307 |
| Titanium | Ti (wt%) | 0.447 | 0.059 | 0.308 | 0.724 |
| Zinc | Zn (ppm) | 37.788 | 11.089 | 18.451 | 98.784 |