| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.152 | 0.495 | 2.614 | 4.380 |
| Arsenic | As (ppm) | 1.194 | 0.133 | 1.002 | 1.627 |
| Calcium | Ca (wt%) | 1.003 | 0.352 | 0.622 | 2.011 |
| Copper | Cu (ppm) | 6.813 | 2.949 | 3.238 | 15.194 |
| Iron | Fe (wt%) | 2.226 | 0.888 | 1.156 | 4.523 |
| Mercury | Hg (ppm) | 0.066 | 0.064 | 0.011 | 0.253 |
| Magnesium | Mg (wt%) | 0.255 | 0.141 | 0.106 | 0.658 |
| Manganese | Mn (ppm) | 786.776 | 156.639 | 511.833 | 1228.180 |
| Sodium | Na (wt%) | 0.678 | 0.060 | 0.487 | 0.804 |
| Phosphorus | P (wt%) | 0.016 | 0.006 | 0.009 | 0.034 |
| Lead | Pb (ppm) | 15.091 | 2.148 | 12.155 | 20.440 |
| Selenium | Se (ppm) | 0.165 | 0.061 | 0.100 | 0.384 |
| Titanium | Ti (wt%) | 0.423 | 0.126 | 0.251 | 0.755 |
| Zinc | Zn (ppm) | 25.820 | 5.890 | 17.544 | 41.899 |