Sample 38
NavDat sample number 12808 · ANDESITE
Sample
| Sample ID | 38 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Collected by | Hammond and Korosec |
| Comment | Andesite of West Crater |
Location
| Latitude | 45.525 |
|---|---|
| Longitude | -122.053 |
| 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 | 55.9 | WT% | XRF | |
| AL2O3 | 16.9 | WT% | XRF | |
| FEOT | 5.8 | WT% | XRF | |
| TIO2 | 1.14 | WT% | XRF | |
| MNO | 0.1 | WT% | XRF | |
| MGO | 3.7 | WT% | XRF | |
| CAO | 7.6 | WT% | XRF | |
| NA2O | 4.4 | WT% | XRF | |
| K2O | 1.7 | WT% | XRF | |
| P2O5 | 0.55 | WT% | XRF | |
| H2O | 1.91 | WT% | XRF | |
| TOTAL | 99.7 | WT% | XRF | |
| LI | 20 | PPM | XRF | |
| RB | 20 | PPM | XRF | |
| CU | 112 | PPM | XRF | |
| SR | 920 | PPM | XRF | |
| BA | 640 | PPM | XRF | |
| ZN | 120 | PPM | XRF | |
| SC | 16 | PPM | XRF | |
| Y | 22 | PPM | XRF | |
| LA | 43 | PPM | XRF | |
| CE | 87 | PPM | XRF | |
| V | 128 | PPM | XRF | |
| CR | 85 | PPM | XRF | |
| NI | 32 | PPM | XRF |