| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.152 | 0.427 | 7.051 | 9.263 |
| Arsenic | As (ppm) | 3.291 | 0.861 | 2.126 | 6.829 |
| Calcium | Ca (wt%) | 2.813 | 0.476 | 1.931 | 5.271 |
| Copper | Cu (ppm) | 36.467 | 16.284 | 10.014 | 99.556 |
| Iron | Fe (wt%) | 7.165 | 1.157 | 3.179 | 9.579 |
| Mercury | Hg (ppm) | 0.034 | 0.023 | 0.010 | 0.187 |
| Magnesium | Mg (wt%) | 1.043 | 0.277 | 0.494 | 2.450 |
| Manganese | Mn (ppm) | 1219.180 | 211.822 | 699.780 | 1764.730 |
| Sodium | Na (wt%) | 1.728 | 0.136 | 1.414 | 2.285 |
| Phosphorus | P (wt%) | 0.092 | 0.015 | 0.061 | 0.136 |
| Lead | Pb (ppm) | 21.439 | 2.705 | 13.579 | 26.750 |
| Selenium | Se (ppm) | 0.240 | 0.106 | 0.102 | 0.683 |
| Titanium | Ti (wt%) | 1.137 | 0.202 | 0.501 | 1.465 |
| Zinc | Zn (ppm) | 123.014 | 16.660 | 76.323 | 158.721 |