| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.641 | 0.346 | 6.038 | 7.220 |
| Arsenic | As (ppm) | 15.757 | 0.395 | 14.996 | 16.806 |
| Calcium | Ca (wt%) | 0.959 | 0.019 | 0.908 | 0.988 |
| Copper | Cu (ppm) | 22.343 | 3.678 | 17.387 | 32.033 |
| Iron | Fe (wt%) | 3.066 | 0.183 | 2.734 | 3.362 |
| Mercury | Hg (ppm) | 0.063 | 0.002 | 0.060 | 0.069 |
| Magnesium | Mg (wt%) | 0.822 | 0.074 | 0.685 | 0.951 |
| Manganese | Mn (ppm) | 692.719 | 18.202 | 638.995 | 706.634 |
| Sodium | Na (wt%) | 0.739 | 0.062 | 0.631 | 0.826 |
| Phosphorus | P (wt%) | 0.085 | 0.003 | 0.076 | 0.091 |
| Lead | Pb (ppm) | 20.732 | 0.984 | 19.087 | 22.776 |
| Selenium | Se (ppm) | 0.765 | 0.059 | 0.654 | 0.857 |
| Titanium | Ti (wt%) | 0.301 | 0.011 | 0.287 | 0.320 |
| Zinc | Zn (ppm) | 92.433 | 7.473 | 79.320 | 109.468 |