| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.271 | 0.442 | 1.081 | 3.282 |
| Arsenic | As (ppm) | 4.654 | 3.678 | 1.655 | 28.552 |
| Calcium | Ca (wt%) | 2.340 | 2.650 | 0.137 | 18.034 |
| Copper | Cu (ppm) | 5.850 | 1.351 | 3.074 | 12.418 |
| Iron | Fe (wt%) | 1.300 | 0.385 | 0.587 | 2.402 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.231 | 0.077 | 0.081 | 0.522 |
| Manganese | Mn (ppm) | 460.019 | 149.689 | 244.962 | 1145.100 |
| Sodium | Na (wt%) | 0.272 | 0.087 | 0.063 | 0.552 |
| Phosphorus | P (wt%) | 0.040 | 0.020 | 0.006 | 0.108 |
| Lead | Pb (ppm) | 12.789 | 2.154 | 6.132 | 17.964 |
| Selenium | Se (ppm) | 0.200 | 0.065 | 0.102 | 0.398 |
| Titanium | Ti (wt%) | 0.225 | 0.103 | 0.105 | 0.600 |
| Zinc | Zn (ppm) | 26.777 | 6.427 | 13.112 | 44.862 |