| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.273 | 0.691 | 2.429 | 7.910 |
| Arsenic | As (ppm) | 5.376 | 2.011 | 1.317 | 23.615 |
| Calcium | Ca (wt%) | 2.289 | 1.287 | 0.485 | 14.845 |
| Copper | Cu (ppm) | 14.046 | 7.335 | 1.428 | 111.594 |
| Iron | Fe (wt%) | 2.229 | 0.614 | 1.065 | 5.421 |
| Mercury | Hg (ppm) | 0.020 | 0.008 | 0.010 | 0.080 |
| Magnesium | Mg (wt%) | 0.859 | 0.277 | 0.245 | 2.480 |
| Manganese | Mn (ppm) | 446.689 | 216.821 | 132.617 | 1230.470 |
| Sodium | Na (wt%) | 0.984 | 0.351 | 0.321 | 2.326 |
| Phosphorus | P (wt%) | 0.064 | 0.013 | 0.025 | 0.133 |
| Lead | Pb (ppm) | 21.360 | 7.792 | 11.036 | 231.177 |
| Selenium | Se (ppm) | 0.535 | 0.387 | 0.101 | 5.168 |
| Titanium | Ti (wt%) | 0.276 | 0.087 | 0.095 | 0.774 |
| Zinc | Zn (ppm) | 55.432 | 16.194 | 20.657 | 397.044 |