| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.021 | 0.366 | 6.974 | 9.445 |
| Arsenic | As (ppm) | 2.789 | 1.174 | 0.982 | 8.349 |
| Calcium | Ca (wt%) | 4.360 | 0.975 | 2.521 | 6.918 |
| Copper | Cu (ppm) | 66.585 | 27.979 | 22.371 | 138.973 |
| Iron | Fe (wt%) | 6.790 | 1.103 | 4.395 | 9.987 |
| Mercury | Hg (ppm) | 0.032 | 0.020 | 0.010 | 0.135 |
| Magnesium | Mg (wt%) | 2.064 | 0.666 | 0.990 | 3.785 |
| Manganese | Mn (ppm) | 1274.100 | 218.075 | 655.815 | 2243.050 |
| Sodium | Na (wt%) | 2.003 | 0.160 | 1.425 | 2.610 |
| Phosphorus | P (wt%) | 0.079 | 0.010 | 0.040 | 0.111 |
| Lead | Pb (ppm) | 8.508 | 2.349 | 2.023 | 17.477 |
| Selenium | Se (ppm) | 0.168 | 0.067 | 0.100 | 0.493 |
| Titanium | Ti (wt%) | 0.869 | 0.181 | 0.495 | 1.727 |
| Zinc | Zn (ppm) | 103.705 | 10.777 | 80.024 | 145.510 |