| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.947 | 0.210 | 0.426 | 1.696 |
| Arsenic | As (ppm) | 1.809 | 0.766 | 0.929 | 4.595 |
| Calcium | Ca (wt%) | 0.042 | 0.015 | 0.017 | 0.105 |
| Copper | Cu (ppm) | 2.004 | 0.484 | 1.007 | 3.956 |
| Iron | Fe (wt%) | 0.518 | 0.162 | 0.317 | 1.134 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.033 | 0.009 | 0.017 | 0.066 |
| Manganese | Mn (ppm) | 110.121 | 25.078 | 71.530 | 227.094 |
| Sodium | Na (wt%) | 0.078 | 0.034 | 0.013 | 0.209 |
| Phosphorus | P (wt%) | 0.008 | 0.002 | 0.006 | 0.013 |
| Lead | Pb (ppm) | 8.305 | 1.939 | 5.095 | 14.428 |
| Selenium | Se (ppm) | 0.112 | 0.016 | 0.100 | 0.186 |
| Titanium | Ti (wt%) | 0.248 | 0.037 | 0.159 | 0.363 |
| Zinc | Zn (ppm) | 15.137 | 7.432 | 7.063 | 42.972 |