| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.314 | 0.722 | 2.095 | 5.435 |
| Arsenic | As (ppm) | 6.238 | 3.507 | 3.185 | 19.346 |
| Calcium | Ca (wt%) | 0.295 | 0.173 | 0.101 | 0.930 |
| Copper | Cu (ppm) | 6.333 | 0.899 | 4.018 | 7.936 |
| Iron | Fe (wt%) | 1.955 | 0.521 | 1.324 | 3.943 |
| Mercury | Hg (ppm) | 0.022 | 0.012 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.193 | 0.052 | 0.111 | 0.367 |
| Manganese | Mn (ppm) | 826.772 | 254.150 | 257.563 | 1723.450 |
| Sodium | Na (wt%) | 0.356 | 0.082 | 0.212 | 0.591 |
| Phosphorus | P (wt%) | 0.028 | 0.007 | 0.016 | 0.054 |
| Lead | Pb (ppm) | 18.974 | 3.899 | 10.102 | 31.514 |
| Selenium | Se (ppm) | 0.328 | 0.130 | 0.101 | 0.777 |
| Titanium | Ti (wt%) | 0.206 | 0.025 | 0.170 | 0.289 |
| Zinc | Zn (ppm) | 38.448 | 12.934 | 22.046 | 85.147 |