| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.889 | 1.389 | 0.261 | 7.615 |
| Arsenic | As (ppm) | 8.706 | 8.467 | 1.427 | 57.041 |
| Calcium | Ca (wt%) | 0.919 | 1.381 | 0.027 | 10.789 |
| Copper | Cu (ppm) | 4.934 | 3.206 | 1.050 | 17.166 |
| Iron | Fe (wt%) | 2.007 | 1.250 | 0.420 | 6.985 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.021 |
| Magnesium | Mg (wt%) | 0.110 | 0.092 | 0.019 | 0.443 |
| Manganese | Mn (ppm) | 543.830 | 313.605 | 137.073 | 2258.540 |
| Sodium | Na (wt%) | 0.062 | 0.044 | 0.011 | 0.164 |
| Phosphorus | P (wt%) | 0.047 | 0.055 | 0.003 | 0.352 |
| Lead | Pb (ppm) | 23.088 | 7.378 | 6.725 | 42.459 |
| Selenium | Se (ppm) | 0.288 | 0.219 | 0.100 | 0.984 |
| Titanium | Ti (wt%) | 0.431 | 0.082 | 0.161 | 0.646 |
| Zinc | Zn (ppm) | 29.215 | 16.406 | 6.661 | 86.666 |