| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.493 | 0.194 | 0.041 | 1.339 |
| Arsenic | As (ppm) | 1.673 | 1.067 | 0.326 | 8.605 |
| Calcium | Ca (wt%) | 0.784 | 1.257 | 0.062 | 10.968 |
| Copper | Cu (ppm) | 39.184 | 39.158 | 1.353 | 314.497 |
| Iron | Fe (wt%) | 0.367 | 0.147 | 0.086 | 1.271 |
| Mercury | Hg (ppm) | 0.021 | 0.008 | 0.010 | 0.063 |
| Magnesium | Mg (wt%) | 0.029 | 0.017 | 0.005 | 0.126 |
| Manganese | Mn (ppm) | 145.076 | 72.485 | 29.879 | 503.114 |
| Sodium | Na (wt%) | 0.005 | 0.002 | 0.003 | 0.017 |
| Phosphorus | P (wt%) | 0.043 | 0.025 | 0.006 | 0.196 |
| Lead | Pb (ppm) | 27.706 | 11.795 | 8.942 | 101.264 |
| Selenium | Se (ppm) | 0.146 | 0.049 | 0.100 | 0.530 |
| Titanium | Ti (wt%) | 0.498 | 0.131 | 0.135 | 1.172 |
| Zinc | Zn (ppm) | 34.417 | 29.224 | 1.541 | 256.347 |