| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.461 | 0.582 | 6.857 | 9.165 |
| Arsenic | As (ppm) | 4.906 | 0.710 | 3.105 | 8.345 |
| Calcium | Ca (wt%) | 1.965 | 0.424 | 1.225 | 3.586 |
| Copper | Cu (ppm) | 22.363 | 1.868 | 17.278 | 27.322 |
| Iron | Fe (wt%) | 4.127 | 0.404 | 2.537 | 4.980 |
| Mercury | Hg (ppm) | 0.015 | 0.008 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.859 | 0.139 | 0.428 | 1.136 |
| Manganese | Mn (ppm) | 687.902 | 43.168 | 522.891 | 772.936 |
| Sodium | Na (wt%) | 1.784 | 0.317 | 1.428 | 2.881 |
| Phosphorus | P (wt%) | 0.113 | 0.022 | 0.084 | 0.228 |
| Lead | Pb (ppm) | 9.950 | 0.913 | 7.006 | 12.969 |
| Selenium | Se (ppm) | 0.100 | 0.001 | 0.100 | 0.106 |
| Titanium | Ti (wt%) | 0.604 | 0.056 | 0.403 | 0.779 |
| Zinc | Zn (ppm) | 74.216 | 8.560 | 60.021 | 122.572 |