| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.220 | 0.600 | 1.046 | 4.009 |
| Arsenic | As (ppm) | 3.340 | 0.795 | 1.255 | 5.138 |
| Calcium | Ca (wt%) | 0.161 | 0.180 | 0.032 | 0.970 |
| Copper | Cu (ppm) | 6.092 | 1.098 | 4.175 | 9.725 |
| Iron | Fe (wt%) | 0.840 | 0.199 | 0.351 | 1.513 |
| Mercury | Hg (ppm) | 0.029 | 0.010 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.160 | 0.121 | 0.041 | 0.662 |
| Manganese | Mn (ppm) | 350.664 | 145.099 | 116.814 | 968.283 |
| Sodium | Na (wt%) | 0.256 | 0.145 | 0.049 | 0.831 |
| Phosphorus | P (wt%) | 0.020 | 0.007 | 0.006 | 0.039 |
| Lead | Pb (ppm) | 10.523 | 2.392 | 4.586 | 19.386 |
| Selenium | Se (ppm) | 0.258 | 0.094 | 0.101 | 0.571 |
| Titanium | Ti (wt%) | 0.233 | 0.028 | 0.146 | 0.310 |
| Zinc | Zn (ppm) | 21.047 | 5.043 | 10.043 | 39.716 |