| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.951 | 0.277 | 0.270 | 1.967 |
| Arsenic | As (ppm) | 3.032 | 0.468 | 2.113 | 4.806 |
| Calcium | Ca (wt%) | 0.045 | 0.013 | 0.013 | 0.085 |
| Copper | Cu (ppm) | 3.674 | 0.697 | 3.000 | 7.865 |
| Iron | Fe (wt%) | 0.688 | 0.100 | 0.425 | 1.115 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.045 | 0.014 | 0.016 | 0.088 |
| Manganese | Mn (ppm) | 252.509 | 72.811 | 92.640 | 589.753 |
| Sodium | Na (wt%) | 0.079 | 0.031 | 0.014 | 0.198 |
| Phosphorus | P (wt%) | 0.014 | 0.003 | 0.008 | 0.021 |
| Lead | Pb (ppm) | 19.995 | 4.185 | 9.549 | 40.082 |
| Selenium | Se (ppm) | 0.127 | 0.038 | 0.101 | 0.371 |
| Titanium | Ti (wt%) | 0.476 | 0.101 | 0.232 | 0.903 |
| Zinc | Zn (ppm) | 16.465 | 2.986 | 8.573 | 25.469 |