| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.335 | 0.221 | 0.840 | 2.470 |
| Arsenic | As (ppm) | 2.084 | 0.159 | 1.300 | 2.257 |
| Calcium | Ca (wt%) | 1.066 | 0.133 | 0.199 | 1.282 |
| Copper | Cu (ppm) | 5.282 | 1.055 | 1.000 | 7.146 |
| Iron | Fe (wt%) | 0.646 | 0.072 | 0.370 | 0.785 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.373 | 0.056 | 0.062 | 0.452 |
| Manganese | Mn (ppm) | 98.360 | 18.762 | 74.000 | 135.544 |
| Sodium | Na (wt%) | 0.920 | 0.234 | 0.213 | 1.135 |
| Phosphorus | P (wt%) | 0.013 | 0.004 | 0.006 | 0.022 |
| Lead | Pb (ppm) | 22.211 | 3.116 | 5.000 | 26.527 |
| Selenium | Se (ppm) | 0.121 | 0.026 | 0.100 | 0.177 |
| Titanium | Ti (wt%) | 0.157 | 0.023 | 0.136 | 0.310 |
| Zinc | Zn (ppm) | 22.591 | 3.533 | 10.000 | 29.464 |