| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.933 | 0.519 | 2.684 | 4.945 |
| Arsenic | As (ppm) | 4.879 | 0.954 | 3.150 | 8.327 |
| Calcium | Ca (wt%) | 2.816 | 2.114 | 0.338 | 10.961 |
| Copper | Cu (ppm) | 13.487 | 2.513 | 6.266 | 18.800 |
| Iron | Fe (wt%) | 1.799 | 0.167 | 1.432 | 2.195 |
| Mercury | Hg (ppm) | 0.086 | 0.050 | 0.011 | 0.226 |
| Magnesium | Mg (wt%) | 0.449 | 0.087 | 0.225 | 0.647 |
| Manganese | Mn (ppm) | 259.650 | 61.637 | 116.097 | 421.467 |
| Sodium | Na (wt%) | 0.204 | 0.063 | 0.111 | 0.383 |
| Phosphorus | P (wt%) | 0.041 | 0.008 | 0.023 | 0.064 |
| Lead | Pb (ppm) | 16.905 | 3.392 | 10.089 | 29.725 |
| Selenium | Se (ppm) | 0.300 | 0.099 | 0.112 | 0.591 |
| Titanium | Ti (wt%) | 0.300 | 0.040 | 0.214 | 0.390 |
| Zinc | Zn (ppm) | 50.159 | 7.250 | 36.553 | 79.898 |