| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.541 | 0.336 | 2.870 | 5.223 |
| Arsenic | As (ppm) | 4.584 | 0.858 | 2.501 | 5.988 |
| Calcium | Ca (wt%) | 0.562 | 0.232 | 0.281 | 2.091 |
| Copper | Cu (ppm) | 9.508 | 10.937 | 5.953 | 115.390 |
| Iron | Fe (wt%) | 1.513 | 0.164 | 1.221 | 2.324 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.021 |
| Magnesium | Mg (wt%) | 0.324 | 0.070 | 0.214 | 0.566 |
| Manganese | Mn (ppm) | 206.894 | 22.168 | 154.162 | 255.754 |
| Sodium | Na (wt%) | 0.370 | 0.046 | 0.257 | 0.450 |
| Phosphorus | P (wt%) | 0.024 | 0.006 | 0.015 | 0.045 |
| Lead | Pb (ppm) | 12.206 | 2.393 | 9.164 | 22.943 |
| Selenium | Se (ppm) | 0.117 | 0.036 | 0.100 | 0.300 |
| Titanium | Ti (wt%) | 0.225 | 0.013 | 0.174 | 0.248 |
| Zinc | Zn (ppm) | 41.861 | 20.208 | 29.102 | 227.338 |