| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.032 | 0.215 | 6.560 | 7.460 |
| Arsenic | As (ppm) | 6.467 | 1.230 | 4.403 | 9.125 |
| Calcium | Ca (wt%) | 1.889 | 0.135 | 1.623 | 2.110 |
| Copper | Cu (ppm) | 17.903 | 1.590 | 15.308 | 23.175 |
| Iron | Fe (wt%) | 3.537 | 0.446 | 3.010 | 4.245 |
| Mercury | Hg (ppm) | 0.060 | 0.015 | 0.038 | 0.088 |
| Magnesium | Mg (wt%) | 0.980 | 0.140 | 0.720 | 1.156 |
| Manganese | Mn (ppm) | 929.576 | 104.757 | 728.933 | 1131.100 |
| Sodium | Na (wt%) | 2.061 | 0.081 | 1.936 | 2.253 |
| Phosphorus | P (wt%) | 0.183 | 0.073 | 0.080 | 0.290 |
| Lead | Pb (ppm) | 12.595 | 2.938 | 7.338 | 20.177 |
| Selenium | Se (ppm) | 0.178 | 0.053 | 0.100 | 0.276 |
| Titanium | Ti (wt%) | 0.407 | 0.014 | 0.380 | 0.429 |
| Zinc | Zn (ppm) | 95.106 | 16.176 | 62.242 | 126.397 |