| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.579 | 0.985 | 2.384 | 6.566 |
| Arsenic | As (ppm) | 4.598 | 1.119 | 1.427 | 8.481 |
| Calcium | Ca (wt%) | 2.458 | 1.112 | 0.678 | 10.081 |
| Copper | Cu (ppm) | 11.027 | 2.711 | 5.435 | 20.643 |
| Iron | Fe (wt%) | 1.836 | 0.505 | 0.668 | 2.980 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.523 | 0.152 | 0.179 | 1.002 |
| Manganese | Mn (ppm) | 340.988 | 85.289 | 128.252 | 646.878 |
| Sodium | Na (wt%) | 0.624 | 0.128 | 0.451 | 1.115 |
| Phosphorus | P (wt%) | 0.043 | 0.015 | 0.015 | 0.083 |
| Lead | Pb (ppm) | 19.008 | 3.078 | 13.045 | 27.868 |
| Selenium | Se (ppm) | 0.293 | 0.150 | 0.101 | 0.955 |
| Titanium | Ti (wt%) | 0.233 | 0.054 | 0.121 | 0.360 |
| Zinc | Zn (ppm) | 50.392 | 19.604 | 23.200 | 181.656 |