| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.715 | 1.005 | 4.761 | 12.721 |
| Arsenic | As (ppm) | 7.597 | 3.768 | 1.471 | 26.124 |
| Calcium | Ca (wt%) | 1.794 | 0.923 | 0.199 | 5.504 |
| Copper | Cu (ppm) | 77.505 | 28.593 | 13.410 | 239.373 |
| Iron | Fe (wt%) | 6.002 | 1.852 | 1.450 | 18.126 |
| Mercury | Hg (ppm) | 0.091 | 0.147 | 0.010 | 1.115 |
| Magnesium | Mg (wt%) | 2.540 | 1.556 | 0.525 | 11.562 |
| Manganese | Mn (ppm) | 1465.350 | 376.797 | 317.803 | 3465.030 |
| Sodium | Na (wt%) | 1.054 | 0.265 | 0.314 | 2.007 |
| Phosphorus | P (wt%) | 0.101 | 0.046 | 0.024 | 0.256 |
| Lead | Pb (ppm) | 12.944 | 6.459 | 2.259 | 52.347 |
| Selenium | Se (ppm) | 0.223 | 0.158 | 0.100 | 1.554 |
| Titanium | Ti (wt%) | 0.491 | 0.129 | 0.181 | 0.836 |
| Zinc | Zn (ppm) | 126.162 | 27.087 | 44.157 | 215.652 |