| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.802 | 0.611 | 1.431 | 5.042 |
| Arsenic | As (ppm) | 5.839 | 1.886 | 1.591 | 13.257 |
| Calcium | Ca (wt%) | 7.041 | 3.592 | 0.364 | 16.413 |
| Copper | Cu (ppm) | 8.959 | 3.285 | 5.012 | 23.641 |
| Iron | Fe (wt%) | 1.551 | 0.386 | 0.608 | 2.649 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.019 |
| Magnesium | Mg (wt%) | 0.269 | 0.066 | 0.099 | 0.490 |
| Manganese | Mn (ppm) | 466.744 | 135.650 | 149.665 | 829.523 |
| Sodium | Na (wt%) | 0.095 | 0.019 | 0.043 | 0.151 |
| Phosphorus | P (wt%) | 0.031 | 0.007 | 0.013 | 0.059 |
| Lead | Pb (ppm) | 18.076 | 3.599 | 8.142 | 30.741 |
| Selenium | Se (ppm) | 0.211 | 0.075 | 0.100 | 0.481 |
| Titanium | Ti (wt%) | 0.176 | 0.033 | 0.096 | 0.289 |
| Zinc | Zn (ppm) | 28.078 | 5.750 | 12.105 | 49.270 |