| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.680 | 0.603 | 0.271 | 3.562 |
| Arsenic | As (ppm) | 13.432 | 7.420 | 1.161 | 37.258 |
| Calcium | Ca (wt%) | 1.119 | 0.369 | 0.496 | 2.389 |
| Copper | Cu (ppm) | 11.270 | 4.222 | 2.061 | 20.987 |
| Iron | Fe (wt%) | 1.946 | 0.909 | 0.171 | 4.466 |
| Mercury | Hg (ppm) | 0.016 | 0.005 | 0.010 | 0.031 |
| Magnesium | Mg (wt%) | 0.439 | 0.136 | 0.129 | 0.907 |
| Manganese | Mn (ppm) | 674.008 | 254.094 | 42.018 | 1104.130 |
| Sodium | Na (wt%) | 0.043 | 0.013 | 0.012 | 0.082 |
| Phosphorus | P (wt%) | 0.031 | 0.016 | 0.003 | 0.087 |
| Lead | Pb (ppm) | 28.090 | 13.171 | 2.124 | 57.744 |
| Selenium | Se (ppm) | 0.216 | 0.183 | 0.101 | 1.283 |
| Titanium | Ti (wt%) | 0.084 | 0.029 | 0.016 | 0.174 |
| Zinc | Zn (ppm) | 79.084 | 52.813 | 7.233 | 264.912 |