| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.362 | 0.990 | 3.246 | 10.336 |
| Arsenic | As (ppm) | 4.844 | 4.030 | 1.242 | 40.246 |
| Calcium | Ca (wt%) | 3.218 | 1.723 | 0.094 | 21.785 |
| Copper | Cu (ppm) | 32.505 | 9.418 | 9.412 | 119.878 |
| Iron | Fe (wt%) | 4.465 | 0.937 | 1.685 | 8.614 |
| Mercury | Hg (ppm) | 0.028 | 0.018 | 0.010 | 0.139 |
| Magnesium | Mg (wt%) | 1.151 | 0.467 | 0.194 | 3.792 |
| Manganese | Mn (ppm) | 946.125 | 224.964 | 338.373 | 2027.950 |
| Sodium | Na (wt%) | 2.029 | 0.390 | 0.158 | 3.570 |
| Phosphorus | P (wt%) | 0.082 | 0.024 | 0.015 | 0.234 |
| Lead | Pb (ppm) | 16.793 | 7.631 | 2.285 | 65.384 |
| Selenium | Se (ppm) | 0.160 | 0.136 | 0.100 | 1.807 |
| Titanium | Ti (wt%) | 0.630 | 0.136 | 0.198 | 1.205 |
| Zinc | Zn (ppm) | 84.289 | 15.751 | 42.198 | 181.439 |