| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.520 | 1.075 | 1.803 | 6.835 |
| Arsenic | As (ppm) | 7.619 | 2.308 | 3.103 | 18.540 |
| Calcium | Ca (wt%) | 10.621 | 6.605 | 1.392 | 26.118 |
| Copper | Cu (ppm) | 16.213 | 2.324 | 12.649 | 27.949 |
| Iron | Fe (wt%) | 2.034 | 0.496 | 0.832 | 3.101 |
| Mercury | Hg (ppm) | 0.033 | 0.009 | 0.013 | 0.059 |
| Magnesium | Mg (wt%) | 0.890 | 0.227 | 0.518 | 1.778 |
| Manganese | Mn (ppm) | 506.753 | 148.664 | 253.393 | 943.974 |
| Sodium | Na (wt%) | 0.153 | 0.046 | 0.060 | 0.265 |
| Phosphorus | P (wt%) | 0.042 | 0.009 | 0.024 | 0.078 |
| Lead | Pb (ppm) | 18.715 | 2.996 | 9.498 | 28.309 |
| Selenium | Se (ppm) | 0.567 | 0.143 | 0.306 | 1.093 |
| Titanium | Ti (wt%) | 0.251 | 0.064 | 0.104 | 0.367 |
| Zinc | Zn (ppm) | 58.288 | 18.496 | 23.686 | 101.104 |