| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.199 | 0.429 | 1.662 | 2.925 |
| Arsenic | As (ppm) | 2.649 | 0.453 | 1.720 | 3.197 |
| Calcium | Ca (wt%) | 10.743 | 5.364 | 2.713 | 20.376 |
| Copper | Cu (ppm) | 8.689 | 1.821 | 5.629 | 11.992 |
| Iron | Fe (wt%) | 0.870 | 0.222 | 0.556 | 1.219 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.308 | 0.064 | 0.213 | 0.431 |
| Manganese | Mn (ppm) | 157.191 | 7.408 | 143.372 | 177.595 |
| Sodium | Na (wt%) | 0.095 | 0.020 | 0.067 | 0.151 |
| Phosphorus | P (wt%) | 0.018 | 0.004 | 0.010 | 0.025 |
| Lead | Pb (ppm) | 11.277 | 2.014 | 8.047 | 15.847 |
| Selenium | Se (ppm) | 0.150 | 0.045 | 0.100 | 0.252 |
| Titanium | Ti (wt%) | 0.116 | 0.007 | 0.103 | 0.127 |
| Zinc | Zn (ppm) | 18.116 | 5.036 | 8.133 | 24.987 |