| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.206 | 0.284 | 4.552 | 5.840 |
| Arsenic | As (ppm) | 3.984 | 1.751 | 0.987 | 7.345 |
| Calcium | Ca (wt%) | 3.129 | 0.905 | 1.339 | 5.139 |
| Copper | Cu (ppm) | 7.533 | 4.013 | 1.016 | 15.171 |
| Iron | Fe (wt%) | 3.632 | 0.572 | 2.769 | 4.626 |
| Mercury | Hg (ppm) | 0.058 | 0.013 | 0.032 | 0.090 |
| Magnesium | Mg (wt%) | 1.198 | 0.398 | 0.634 | 2.552 |
| Manganese | Mn (ppm) | 803.239 | 188.773 | 518.503 | 1229.710 |
| Sodium | Na (wt%) | 1.119 | 0.147 | 0.832 | 1.492 |
| Phosphorus | P (wt%) | 0.062 | 0.004 | 0.053 | 0.070 |
| Lead | Pb (ppm) | 43.278 | 12.505 | 23.382 | 77.620 |
| Selenium | Se (ppm) | 0.179 | 0.061 | 0.100 | 0.361 |
| Titanium | Ti (wt%) | 0.635 | 0.152 | 0.351 | 0.979 |
| Zinc | Zn (ppm) | 71.096 | 11.853 | 45.427 | 103.895 |