| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.104 | 0.721 | 1.098 | 5.114 |
| Arsenic | As (ppm) | 7.984 | 5.097 | 0.755 | 28.948 |
| Calcium | Ca (wt%) | 16.096 | 3.809 | 6.537 | 26.192 |
| Copper | Cu (ppm) | 14.223 | 3.616 | 6.004 | 20.780 |
| Iron | Fe (wt%) | 1.449 | 0.361 | 0.461 | 2.471 |
| Mercury | Hg (ppm) | 0.015 | 0.003 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.396 | 0.092 | 0.154 | 0.923 |
| Manganese | Mn (ppm) | 514.307 | 283.594 | 98.130 | 1516.470 |
| Sodium | Na (wt%) | 0.084 | 0.012 | 0.046 | 0.113 |
| Phosphorus | P (wt%) | 0.033 | 0.010 | 0.010 | 0.053 |
| Lead | Pb (ppm) | 22.356 | 4.190 | 13.666 | 39.254 |
| Selenium | Se (ppm) | 0.376 | 0.100 | 0.100 | 0.785 |
| Titanium | Ti (wt%) | 0.161 | 0.039 | 0.050 | 0.271 |
| Zinc | Zn (ppm) | 28.380 | 6.454 | 9.013 | 47.068 |