| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.421 | 1.378 | 1.384 | 8.799 |
| Arsenic | As (ppm) | 6.226 | 4.153 | 1.116 | 43.153 |
| Calcium | Ca (wt%) | 1.942 | 1.424 | 0.109 | 14.264 |
| Copper | Cu (ppm) | 19.044 | 9.934 | 3.173 | 71.168 |
| Iron | Fe (wt%) | 2.336 | 1.251 | 0.438 | 9.126 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.088 |
| Magnesium | Mg (wt%) | 0.896 | 0.446 | 0.110 | 4.323 |
| Manganese | Mn (ppm) | 548.623 | 281.151 | 81.840 | 2490.980 |
| Sodium | Na (wt%) | 0.506 | 0.322 | 0.056 | 2.840 |
| Phosphorus | P (wt%) | 0.079 | 0.046 | 0.015 | 0.418 |
| Lead | Pb (ppm) | 17.338 | 4.064 | 7.271 | 84.338 |
| Selenium | Se (ppm) | 0.192 | 0.079 | 0.100 | 0.884 |
| Titanium | Ti (wt%) | 0.312 | 0.178 | 0.057 | 1.291 |
| Zinc | Zn (ppm) | 53.546 | 19.907 | 12.211 | 117.214 |