| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.822 | 1.243 | 3.986 | 10.762 |
| Arsenic | As (ppm) | 5.578 | 3.440 | 1.401 | 24.717 |
| Calcium | Ca (wt%) | 2.358 | 0.840 | 0.217 | 4.031 |
| Copper | Cu (ppm) | 24.659 | 10.030 | 6.645 | 74.326 |
| Iron | Fe (wt%) | 4.461 | 1.064 | 1.332 | 8.528 |
| Mercury | Hg (ppm) | 0.044 | 0.025 | 0.010 | 0.127 |
| Magnesium | Mg (wt%) | 1.014 | 0.440 | 0.143 | 3.427 |
| Manganese | Mn (ppm) | 898.828 | 277.382 | 176.311 | 2476.530 |
| Sodium | Na (wt%) | 1.720 | 0.614 | 0.153 | 3.078 |
| Phosphorus | P (wt%) | 0.083 | 0.049 | 0.016 | 0.306 |
| Lead | Pb (ppm) | 22.558 | 10.587 | 6.244 | 83.534 |
| Selenium | Se (ppm) | 0.193 | 0.102 | 0.100 | 0.829 |
| Titanium | Ti (wt%) | 0.538 | 0.133 | 0.186 | 1.001 |
| Zinc | Zn (ppm) | 83.841 | 40.197 | 31.012 | 545.901 |