| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.019 | 0.330 | 2.644 | 4.629 |
| Arsenic | As (ppm) | 6.201 | 0.563 | 4.711 | 8.121 |
| Calcium | Ca (wt%) | 9.800 | 2.143 | 6.070 | 18.287 |
| Copper | Cu (ppm) | 14.578 | 1.480 | 9.308 | 17.203 |
| Iron | Fe (wt%) | 1.760 | 0.149 | 1.175 | 2.120 |
| Mercury | Hg (ppm) | 0.027 | 0.009 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.852 | 0.241 | 0.423 | 2.234 |
| Manganese | Mn (ppm) | 427.511 | 35.532 | 247.082 | 495.560 |
| Sodium | Na (wt%) | 0.225 | 0.039 | 0.121 | 0.382 |
| Phosphorus | P (wt%) | 0.059 | 0.012 | 0.022 | 0.095 |
| Lead | Pb (ppm) | 16.541 | 2.768 | 9.059 | 25.854 |
| Selenium | Se (ppm) | 0.418 | 0.139 | 0.104 | 0.976 |
| Titanium | Ti (wt%) | 0.233 | 0.024 | 0.163 | 0.316 |
| Zinc | Zn (ppm) | 72.353 | 17.513 | 23.014 | 114.425 |