| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.325 | 1.063 | 1.475 | 9.589 |
| Arsenic | As (ppm) | 2.134 | 1.102 | 0.477 | 6.074 |
| Calcium | Ca (wt%) | 0.459 | 0.248 | 0.052 | 1.014 |
| Copper | Cu (ppm) | 14.010 | 7.656 | 4.502 | 52.581 |
| Iron | Fe (wt%) | 2.288 | 0.527 | 0.964 | 3.564 |
| Mercury | Hg (ppm) | 0.043 | 0.013 | 0.013 | 0.078 |
| Magnesium | Mg (wt%) | 0.191 | 0.101 | 0.044 | 0.603 |
| Manganese | Mn (ppm) | 589.075 | 254.783 | 121.003 | 1290.250 |
| Sodium | Na (wt%) | 0.483 | 0.277 | 0.025 | 1.445 |
| Phosphorus | P (wt%) | 0.037 | 0.013 | 0.013 | 0.079 |
| Lead | Pb (ppm) | 38.992 | 9.424 | 14.919 | 68.936 |
| Selenium | Se (ppm) | 0.212 | 0.057 | 0.111 | 0.398 |
| Titanium | Ti (wt%) | 0.628 | 0.068 | 0.500 | 0.839 |
| Zinc | Zn (ppm) | 37.220 | 8.658 | 13.128 | 64.563 |