| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.089 | 0.470 | 3.380 | 5.817 |
| Arsenic | As (ppm) | 6.792 | 1.493 | 3.345 | 9.226 |
| Calcium | Ca (wt%) | 0.872 | 0.148 | 0.293 | 1.175 |
| Copper | Cu (ppm) | 21.680 | 9.264 | 8.066 | 44.763 |
| Iron | Fe (wt%) | 2.294 | 0.317 | 1.271 | 2.734 |
| Mercury | Hg (ppm) | 0.068 | 0.013 | 0.031 | 0.098 |
| Magnesium | Mg (wt%) | 0.651 | 0.114 | 0.209 | 0.789 |
| Manganese | Mn (ppm) | 293.097 | 64.600 | 161.356 | 453.083 |
| Sodium | Na (wt%) | 0.706 | 0.100 | 0.457 | 0.987 |
| Phosphorus | P (wt%) | 0.059 | 0.011 | 0.023 | 0.088 |
| Lead | Pb (ppm) | 24.122 | 3.557 | 18.170 | 36.420 |
| Selenium | Se (ppm) | 0.600 | 0.243 | 0.106 | 1.132 |
| Titanium | Ti (wt%) | 0.242 | 0.018 | 0.197 | 0.281 |
| Zinc | Zn (ppm) | 71.023 | 10.255 | 38.843 | 96.836 |