| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.248 | 0.521 | 5.528 | 8.080 |
| Arsenic | As (ppm) | 11.480 | 2.875 | 5.500 | 20.075 |
| Calcium | Ca (wt%) | 0.960 | 0.291 | 0.539 | 2.013 |
| Copper | Cu (ppm) | 23.291 | 4.306 | 13.000 | 34.000 |
| Iron | Fe (wt%) | 2.696 | 0.461 | 1.920 | 3.986 |
| Mercury | Hg (ppm) | 0.059 | 0.008 | 0.040 | 0.079 |
| Magnesium | Mg (wt%) | 0.779 | 0.111 | 0.581 | 1.120 |
| Manganese | Mn (ppm) | 567.016 | 153.236 | 303.000 | 1051.660 |
| Sodium | Na (wt%) | 0.682 | 0.122 | 0.473 | 0.974 |
| Phosphorus | P (wt%) | 0.073 | 0.011 | 0.055 | 0.114 |
| Lead | Pb (ppm) | 40.097 | 12.247 | 16.000 | 52.000 |
| Selenium | Se (ppm) | 0.542 | 0.113 | 0.400 | 1.000 |
| Titanium | Ti (wt%) | 0.286 | 0.019 | 0.259 | 0.347 |
| Zinc | Zn (ppm) | 85.391 | 10.484 | 65.000 | 115.000 |