| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.633 | 0.590 | 4.273 | 6.709 |
| Arsenic | As (ppm) | 1.634 | 0.479 | 0.599 | 3.243 |
| Calcium | Ca (wt%) | 1.296 | 1.050 | 0.175 | 4.551 |
| Copper | Cu (ppm) | 8.241 | 3.087 | 2.740 | 17.724 |
| Iron | Fe (wt%) | 2.846 | 1.398 | 0.950 | 7.354 |
| Mercury | Hg (ppm) | 0.031 | 0.006 | 0.020 | 0.043 |
| Magnesium | Mg (wt%) | 1.121 | 0.946 | 0.138 | 4.145 |
| Manganese | Mn (ppm) | 758.905 | 302.272 | 474.797 | 1722.890 |
| Sodium | Na (wt%) | 0.781 | 0.326 | 0.300 | 1.592 |
| Phosphorus | P (wt%) | 0.025 | 0.011 | 0.008 | 0.044 |
| Lead | Pb (ppm) | 37.814 | 6.201 | 28.176 | 57.813 |
| Selenium | Se (ppm) | 0.128 | 0.020 | 0.100 | 0.169 |
| Titanium | Ti (wt%) | 0.616 | 0.120 | 0.378 | 0.995 |
| Zinc | Zn (ppm) | 38.811 | 11.059 | 22.597 | 75.865 |