| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.757 | 0.208 | 0.273 | 1.642 |
| Arsenic | As (ppm) | 1.881 | 0.364 | 0.492 | 3.307 |
| Calcium | Ca (wt%) | 0.027 | 0.007 | 0.013 | 0.053 |
| Copper | Cu (ppm) | 4.895 | 0.912 | 2.591 | 8.669 |
| Iron | Fe (wt%) | 0.445 | 0.124 | 0.163 | 0.964 |
| Mercury | Hg (ppm) | 0.031 | 0.010 | 0.011 | 0.083 |
| Magnesium | Mg (wt%) | 0.020 | 0.006 | 0.006 | 0.040 |
| Manganese | Mn (ppm) | 151.397 | 61.150 | 62.733 | 429.051 |
| Sodium | Na (wt%) | 0.011 | 0.003 | 0.004 | 0.028 |
| Phosphorus | P (wt%) | 0.021 | 0.006 | 0.007 | 0.045 |
| Lead | Pb (ppm) | 10.885 | 3.213 | 6.390 | 29.075 |
| Selenium | Se (ppm) | 0.158 | 0.041 | 0.103 | 0.332 |
| Titanium | Ti (wt%) | 0.516 | 0.079 | 0.358 | 0.939 |
| Zinc | Zn (ppm) | 13.856 | 4.217 | 4.596 | 28.357 |