| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.180 | 0.690 | 4.859 | 9.220 |
| Arsenic | As (ppm) | 9.162 | 1.388 | 4.105 | 16.040 |
| Calcium | Ca (wt%) | 1.064 | 0.324 | 0.175 | 2.070 |
| Copper | Cu (ppm) | 52.604 | 8.550 | 28.410 | 74.162 |
| Iron | Fe (wt%) | 4.218 | 0.492 | 3.004 | 6.041 |
| Mercury | Hg (ppm) | 0.695 | 1.760 | 0.021 | 12.328 |
| Magnesium | Mg (wt%) | 1.701 | 1.072 | 0.558 | 8.732 |
| Manganese | Mn (ppm) | 758.762 | 134.033 | 218.009 | 1222.710 |
| Sodium | Na (wt%) | 1.395 | 0.198 | 0.452 | 1.775 |
| Phosphorus | P (wt%) | 0.061 | 0.013 | 0.029 | 0.097 |
| Lead | Pb (ppm) | 13.224 | 2.164 | 6.301 | 19.059 |
| Selenium | Se (ppm) | 0.265 | 0.088 | 0.101 | 0.654 |
| Titanium | Ti (wt%) | 0.418 | 0.032 | 0.297 | 0.480 |
| Zinc | Zn (ppm) | 95.355 | 11.650 | 64.574 | 132.804 |