| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.276 | 0.955 | 1.182 | 6.454 |
| Arsenic | As (ppm) | 4.807 | 1.988 | 1.947 | 10.035 |
| Calcium | Ca (wt%) | 4.396 | 2.320 | 0.309 | 10.464 |
| Copper | Cu (ppm) | 13.164 | 5.110 | 2.178 | 31.291 |
| Iron | Fe (wt%) | 1.371 | 0.313 | 0.521 | 2.121 |
| Mercury | Hg (ppm) | 0.028 | 0.023 | 0.005 | 0.136 |
| Magnesium | Mg (wt%) | 1.665 | 0.841 | 0.254 | 4.177 |
| Manganese | Mn (ppm) | 346.962 | 99.645 | 105.803 | 580.320 |
| Sodium | Na (wt%) | 0.384 | 0.197 | 0.101 | 1.380 |
| Phosphorus | P (wt%) | 0.077 | 0.014 | 0.038 | 0.118 |
| Lead | Pb (ppm) | 40.244 | 101.031 | 5.064 | 743.318 |
| Selenium | Se (ppm) | 0.179 | 0.092 | 0.100 | 0.554 |
| Titanium | Ti (wt%) | 0.181 | 0.038 | 0.059 | 0.303 |
| Zinc | Zn (ppm) | 53.769 | 19.011 | 13.313 | 101.583 |