| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.670 | 0.313 | 4.703 | 6.381 |
| Arsenic | As (ppm) | 2.562 | 0.773 | 1.198 | 5.013 |
| Calcium | Ca (wt%) | 1.423 | 0.377 | 0.646 | 1.917 |
| Copper | Cu (ppm) | 17.448 | 5.751 | 8.748 | 44.840 |
| Iron | Fe (wt%) | 2.783 | 0.384 | 1.856 | 3.780 |
| Mercury | Hg (ppm) | 0.071 | 0.023 | 0.016 | 0.136 |
| Magnesium | Mg (wt%) | 0.609 | 0.075 | 0.362 | 0.755 |
| Manganese | Mn (ppm) | 1232.020 | 423.179 | 713.667 | 3540.690 |
| Sodium | Na (wt%) | 1.797 | 0.193 | 1.305 | 2.225 |
| Phosphorus | P (wt%) | 0.050 | 0.007 | 0.034 | 0.075 |
| Lead | Pb (ppm) | 38.018 | 6.488 | 25.812 | 65.031 |
| Selenium | Se (ppm) | 0.460 | 0.121 | 0.140 | 0.848 |
| Titanium | Ti (wt%) | 0.432 | 0.050 | 0.295 | 0.560 |
| Zinc | Zn (ppm) | 69.192 | 20.105 | 36.885 | 162.804 |