Sample 73
NavDat sample number 12843 · ANDESITE
Sample
| Sample ID | 73 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Collected by | Hammond and Korosec |
| Comment | Andesite of West Crater |
Location
| Latitude | 45.5131 |
|---|---|
| Longitude | -122.021 |
| State / province | Washington |
| Volcanic field | Mount St. Helens |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 0.83 | 0 | 1.65 |
Analyses
Whole Rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 55.6 | WT% | XRF | |
| AL2O3 | 18.64 | WT% | XRF | |
| FEOT | 6.6 | WT% | XRF | |
| TIO2 | 0.99 | WT% | XRF | |
| MNO | 0.1 | WT% | XRF | |
| MGO | 3.52 | WT% | XRF | |
| CAO | 7.06 | WT% | XRF | |
| NA2O | 4.9 | WT% | XRF | |
| K2O | 0.83 | WT% | XRF | |
| P2O5 | 0.27 | WT% | XRF | |
| H2O | 0.39 | WT% | XRF | |
| TOTAL | 98.9 | WT% | XRF | |
| LI | 18 | PPM | XRF | |
| RB | 16 | PPM | XRF | |
| CU | 53 | PPM | XRF | |
| SR | 677 | PPM | XRF | |
| BA | 240 | PPM | XRF | |
| ZN | 92 | PPM | XRF | |
| SC | 14 | PPM | XRF | |
| Y | 20 | PPM | XRF | |
| LA | 15 | PPM | XRF | |
| CE | 38 | PPM | XRF | |
| V | 122 | PPM | XRF | |
| CR | 66 | PPM | XRF | |
| NI | 58 | PPM | XRF |