| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.755 | 0.555 | 3.182 | 6.663 |
| Arsenic | As (ppm) | 3.842 | 1.782 | 0.832 | 10.778 |
| Calcium | Ca (wt%) | 1.464 | 0.578 | 0.387 | 4.556 |
| Copper | Cu (ppm) | 12.275 | 2.885 | 5.074 | 23.132 |
| Iron | Fe (wt%) | 2.963 | 0.494 | 1.585 | 4.634 |
| Mercury | Hg (ppm) | 0.033 | 0.009 | 0.010 | 0.071 |
| Magnesium | Mg (wt%) | 0.722 | 0.215 | 0.182 | 1.865 |
| Manganese | Mn (ppm) | 729.110 | 153.901 | 336.500 | 1493.950 |
| Sodium | Na (wt%) | 1.096 | 0.264 | 0.689 | 1.884 |
| Phosphorus | P (wt%) | 0.079 | 0.022 | 0.035 | 0.167 |
| Lead | Pb (ppm) | 28.117 | 4.009 | 17.101 | 44.095 |
| Selenium | Se (ppm) | 0.133 | 0.030 | 0.100 | 0.304 |
| Titanium | Ti (wt%) | 0.544 | 0.157 | 0.223 | 1.037 |
| Zinc | Zn (ppm) | 51.551 | 10.428 | 28.552 | 87.868 |