| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.090 | 1.119 | 1.560 | 6.614 |
| Arsenic | As (ppm) | 4.120 | 1.496 | 1.816 | 8.457 |
| Calcium | Ca (wt%) | 4.097 | 2.631 | 0.700 | 16.498 |
| Copper | Cu (ppm) | 11.566 | 5.040 | 5.059 | 32.556 |
| Iron | Fe (wt%) | 1.416 | 0.580 | 0.605 | 2.903 |
| Mercury | Hg (ppm) | 0.023 | 0.025 | 0.010 | 0.151 |
| Magnesium | Mg (wt%) | 0.701 | 0.577 | 0.172 | 3.724 |
| Manganese | Mn (ppm) | 244.937 | 63.670 | 122.693 | 467.100 |
| Sodium | Na (wt%) | 0.140 | 0.048 | 0.068 | 0.301 |
| Phosphorus | P (wt%) | 0.025 | 0.011 | 0.009 | 0.074 |
| Lead | Pb (ppm) | 11.700 | 3.600 | 2.155 | 22.313 |
| Selenium | Se (ppm) | 0.164 | 0.060 | 0.100 | 0.386 |
| Titanium | Ti (wt%) | 0.166 | 0.048 | 0.090 | 0.348 |
| Zinc | Zn (ppm) | 42.198 | 21.582 | 11.224 | 125.603 |