| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.940 | 0.242 | 0.623 | 1.768 |
| Arsenic | As (ppm) | 1.168 | 0.501 | 0.357 | 2.950 |
| Calcium | Ca (wt%) | 0.023 | 0.003 | 0.015 | 0.029 |
| Copper | Cu (ppm) | 1.976 | 0.524 | 1.056 | 3.455 |
| Iron | Fe (wt%) | 0.451 | 0.071 | 0.333 | 0.670 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 0.012 | 0.003 | 0.007 | 0.022 |
| Manganese | Mn (ppm) | 114.490 | 17.722 | 69.788 | 154.228 |
| Sodium | Na (wt%) | 0.032 | 0.009 | 0.012 | 0.058 |
| Phosphorus | P (wt%) | 0.011 | 0.002 | 0.008 | 0.019 |
| Lead | Pb (ppm) | 13.981 | 1.109 | 12.463 | 17.744 |
| Selenium | Se (ppm) | 0.106 | 0.006 | 0.100 | 0.121 |
| Titanium | Ti (wt%) | 0.338 | 0.024 | 0.299 | 0.407 |
| Zinc | Zn (ppm) | 10.436 | 0.706 | 9.077 | 11.875 |