| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.662 | 0.511 | 3.387 | 6.082 |
| Arsenic | As (ppm) | 10.116 | 2.458 | 6.107 | 19.212 |
| Calcium | Ca (wt%) | 1.070 | 0.452 | 0.313 | 2.219 |
| Copper | Cu (ppm) | 13.963 | 4.828 | 4.025 | 42.543 |
| Iron | Fe (wt%) | 3.638 | 0.758 | 1.913 | 6.005 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.734 | 0.195 | 0.335 | 1.150 |
| Manganese | Mn (ppm) | 953.336 | 193.858 | 534.697 | 1518.900 |
| Sodium | Na (wt%) | 0.823 | 0.095 | 0.396 | 1.004 |
| Phosphorus | P (wt%) | 0.061 | 0.008 | 0.040 | 0.082 |
| Lead | Pb (ppm) | 37.596 | 25.638 | 12.057 | 148.672 |
| Selenium | Se (ppm) | 0.209 | 0.086 | 0.100 | 0.399 |
| Titanium | Ti (wt%) | 0.585 | 0.170 | 0.286 | 1.149 |
| Zinc | Zn (ppm) | 78.303 | 5.834 | 52.661 | 96.048 |