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Sample OM-57
NavDat sample number 32794 · ANDESITE
Sample
| Sample ID | OM-57 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | Oligocene andesite; sits above sample OM-53 basalt; contains olivine microphenocryst pseudomorphs and cpx microphenocrysts in very fine trachytic matrix |
|---|
Location
| Latitude | 43.2846 |
|---|
| Longitude | -116.829 |
|---|
| Location | upper Salmon Creek |
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| State / province | Idaho |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 30.6 |
|
29.6 |
31.6 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 54.89 | | WT% | XRF |
| AL2O3 | 17.39 | | WT% | XRF |
| FE2O3 | 4.22 | | WT% | XRF |
| FEO | 2.44 | | WT% | XRF |
| MGO | 4.09 | | WT% | XRF |
| CAO | 6.94 | | WT% | XRF |
| NA2O | 4.33 | | WT% | XRF |
| K2O | 1.79 | | WT% | XRF |
| H2O_PLUS | 0.6 | | WT% | XRF |
| H2O_MINUS | 1.08 | | WT% | XRF |
| TIO2 | 1.05 | | WT% | XRF |
| P2O5 | 0.44 | | WT% | XRF |
| MNO | 0.12 | | WT% | XRF |
| CO2 | 0.03 | | WT% | XRF |
| TOTAL | 99.42 | | WT% | XRF |
