| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.673 | 0.485 | 4.476 | 6.743 |
| Arsenic | As (ppm) | 3.493 | 0.348 | 2.760 | 4.319 |
| Calcium | Ca (wt%) | 1.888 | 0.504 | 0.528 | 2.916 |
| Copper | Cu (ppm) | 10.249 | 3.520 | 4.253 | 17.444 |
| Iron | Fe (wt%) | 3.756 | 0.352 | 2.563 | 4.385 |
| Mercury | Hg (ppm) | 0.075 | 0.009 | 0.048 | 0.100 |
| Magnesium | Mg (wt%) | 0.996 | 0.137 | 0.550 | 1.292 |
| Manganese | Mn (ppm) | 1402.770 | 229.598 | 734.066 | 2106.860 |
| Sodium | Na (wt%) | 1.448 | 0.201 | 0.928 | 2.055 |
| Phosphorus | P (wt%) | 0.120 | 0.023 | 0.063 | 0.160 |
| Lead | Pb (ppm) | 33.600 | 2.173 | 29.463 | 38.846 |
| Selenium | Se (ppm) | 0.433 | 0.058 | 0.185 | 0.592 |
| Titanium | Ti (wt%) | 0.783 | 0.181 | 0.391 | 1.241 |
| Zinc | Zn (ppm) | 100.742 | 8.957 | 72.011 | 130.693 |