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Sample OM-69
NavDat sample number 32796 · ANDESITE
Sample
| Sample ID | OM-69 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | Oligocene andesite plug with abundant finely granular opaque pseudomorphs after pyroxene plus a few relict cpx grains in very fine trachytic matrix |
|---|
Location
| Latitude | 43.3595 |
|---|
| Longitude | -116.805 |
|---|
| Location | prominent plug exposed non Hardtrigger Creek east of Shares Basin |
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| State / province | Idaho |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 28 |
|
24 |
33 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 57.1 | | WT% | XRF |
| AL2O3 | 17.43 | | WT% | XRF |
| FE2O3 | 3.57 | | WT% | XRF |
| FEO | 2.46 | | WT% | XRF |
| MGO | 4.5 | | WT% | XRF |
| CAO | 6.42 | | WT% | XRF |
| NA2O | 4.1 | | WT% | XRF |
| K2O | 1.57 | | WT% | XRF |
| H2O_PLUS | 0.88 | | WT% | XRF |
| H2O_MINUS | 0.64 | | WT% | XRF |
| TIO2 | 0.81 | | WT% | XRF |
| P2O5 | 0.32 | | WT% | XRF |
| MNO | 0.1 | | WT% | XRF |
| CO2 | 0.05 | | WT% | XRF |
| TOTAL | 99.98 | | WT% | XRF |
