| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.070 | 0.600 | 2.599 | 6.864 |
| Arsenic | As (ppm) | 7.584 | 2.608 | 3.493 | 18.163 |
| Calcium | Ca (wt%) | 5.887 | 2.093 | 0.632 | 17.847 |
| Copper | Cu (ppm) | 20.598 | 11.289 | 9.407 | 104.625 |
| Iron | Fe (wt%) | 1.781 | 0.267 | 1.110 | 2.897 |
| Mercury | Hg (ppm) | 0.014 | 0.003 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.832 | 0.345 | 0.389 | 2.143 |
| Manganese | Mn (ppm) | 321.769 | 38.983 | 233.515 | 509.879 |
| Sodium | Na (wt%) | 0.269 | 0.033 | 0.185 | 0.380 |
| Phosphorus | P (wt%) | 0.040 | 0.007 | 0.021 | 0.066 |
| Lead | Pb (ppm) | 14.136 | 2.117 | 10.274 | 30.808 |
| Selenium | Se (ppm) | 0.208 | 0.056 | 0.101 | 0.398 |
| Titanium | Ti (wt%) | 0.226 | 0.028 | 0.141 | 0.300 |
| Zinc | Zn (ppm) | 47.578 | 7.282 | 29.114 | 71.685 |