| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.271 | 0.508 | 0.361 | 3.623 |
| Arsenic | As (ppm) | 2.440 | 0.739 | 1.000 | 8.651 |
| Calcium | Ca (wt%) | 0.095 | 0.102 | 0.010 | 0.533 |
| Copper | Cu (ppm) | 4.103 | 1.017 | 1.477 | 8.244 |
| Iron | Fe (wt%) | 0.650 | 0.313 | 0.233 | 1.814 |
| Mercury | Hg (ppm) | 0.033 | 0.010 | 0.011 | 0.087 |
| Magnesium | Mg (wt%) | 0.041 | 0.019 | 0.011 | 0.129 |
| Manganese | Mn (ppm) | 153.644 | 112.870 | 40.968 | 582.223 |
| Sodium | Na (wt%) | 0.054 | 0.058 | 0.006 | 0.272 |
| Phosphorus | P (wt%) | 0.033 | 0.014 | 0.008 | 0.110 |
| Lead | Pb (ppm) | 14.188 | 3.757 | 4.333 | 31.621 |
| Selenium | Se (ppm) | 0.317 | 0.124 | 0.104 | 0.874 |
| Titanium | Ti (wt%) | 0.525 | 0.102 | 0.313 | 1.057 |
| Zinc | Zn (ppm) | 21.245 | 7.427 | 5.682 | 58.935 |