| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.159 | 0.262 | 0.572 | 2.006 |
| Arsenic | As (ppm) | 2.428 | 1.108 | 0.415 | 8.656 |
| Calcium | Ca (wt%) | 0.064 | 0.024 | 0.032 | 0.264 |
| Copper | Cu (ppm) | 3.221 | 1.046 | 1.004 | 7.404 |
| Iron | Fe (wt%) | 0.630 | 0.215 | 0.278 | 1.846 |
| Mercury | Hg (ppm) | 0.017 | 0.005 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.047 | 0.017 | 0.021 | 0.132 |
| Manganese | Mn (ppm) | 136.991 | 36.289 | 65.617 | 384.812 |
| Sodium | Na (wt%) | 0.110 | 0.050 | 0.041 | 0.327 |
| Phosphorus | P (wt%) | 0.009 | 0.002 | 0.005 | 0.019 |
| Lead | Pb (ppm) | 11.007 | 2.067 | 6.254 | 19.633 |
| Selenium | Se (ppm) | 0.122 | 0.027 | 0.100 | 0.292 |
| Titanium | Ti (wt%) | 0.281 | 0.043 | 0.181 | 0.460 |
| Zinc | Zn (ppm) | 15.030 | 3.677 | 8.017 | 32.492 |