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Sample OM-62
NavDat sample number 32795 · ANDESITE
Sample
| Sample ID | OM-62 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | Oligocene andesite; prominent quartz xenocrysts, opaque pseudomorphs of mafic phenocrysts, and cpx microphenos in very fine trachytic matrix |
|---|
Location
| Latitude | 43.2794 |
|---|
| Longitude | -116.849 |
|---|
| Location | near upper Salmon Creek on east facing slope of ridge |
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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 | 57.81 | | WT% | XRF |
| AL2O3 | 17.03 | | WT% | XRF |
| FE2O3 | 4.3 | | WT% | XRF |
| FEO | 1.76 | | WT% | XRF |
| MGO | 3.33 | | WT% | XRF |
| CAO | 6.07 | | WT% | XRF |
| NA2O | 4.39 | | WT% | XRF |
| K2O | 2.05 | | WT% | XRF |
| H2O_PLUS | 0.66 | | WT% | XRF |
| H2O_MINUS | 1.29 | | WT% | XRF |
| TIO2 | 1.01 | | WT% | XRF |
| P2O5 | 0.49 | | WT% | XRF |
| MNO | 0.09 | | WT% | XRF |
| CO2 | 0.03 | | WT% | XRF |
| TOTAL | 100.32 | | WT% | XRF |
