| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.481 | 0.387 | 0.605 | 2.981 |
| Arsenic | As (ppm) | 5.741 | 4.153 | 0.963 | 35.814 |
| Calcium | Ca (wt%) | 0.126 | 0.095 | 0.023 | 0.804 |
| Copper | Cu (ppm) | 4.471 | 0.768 | 3.025 | 7.806 |
| Iron | Fe (wt%) | 0.720 | 0.245 | 0.212 | 1.284 |
| Mercury | Hg (ppm) | 0.019 | 0.006 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 0.071 | 0.027 | 0.027 | 0.197 |
| Manganese | Mn (ppm) | 153.963 | 63.681 | 31.549 | 283.393 |
| Sodium | Na (wt%) | 0.073 | 0.050 | 0.016 | 0.272 |
| Phosphorus | P (wt%) | 0.011 | 0.002 | 0.005 | 0.020 |
| Lead | Pb (ppm) | 11.306 | 2.566 | 2.748 | 20.509 |
| Selenium | Se (ppm) | 0.202 | 0.051 | 0.101 | 0.476 |
| Titanium | Ti (wt%) | 0.292 | 0.082 | 0.167 | 0.587 |
| Zinc | Zn (ppm) | 15.207 | 5.724 | 5.551 | 33.801 |