| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.376 | 0.248 | 2.653 | 4.146 |
| Arsenic | As (ppm) | 5.490 | 0.614 | 3.770 | 7.438 |
| Calcium | Ca (wt%) | 0.494 | 0.124 | 0.280 | 1.201 |
| Copper | Cu (ppm) | 8.734 | 0.784 | 6.380 | 10.974 |
| Iron | Fe (wt%) | 1.394 | 0.105 | 1.053 | 1.667 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.293 | 0.032 | 0.218 | 0.440 |
| Manganese | Mn (ppm) | 214.760 | 16.526 | 157.153 | 272.225 |
| Sodium | Na (wt%) | 0.396 | 0.042 | 0.283 | 0.532 |
| Phosphorus | P (wt%) | 0.023 | 0.004 | 0.014 | 0.036 |
| Lead | Pb (ppm) | 11.973 | 0.670 | 10.213 | 13.943 |
| Selenium | Se (ppm) | 0.103 | 0.011 | 0.100 | 0.195 |
| Titanium | Ti (wt%) | 0.220 | 0.011 | 0.186 | 0.245 |
| Zinc | Zn (ppm) | 38.135 | 3.011 | 27.006 | 45.633 |