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Sample MB-498
NavDat sample number 75337 · ANDESITE
Sample
| Sample ID | MB-498 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | andesite-dacite dike |
|---|
Location
| Latitude | 48.83 |
|---|
| Longitude | -121.838 |
|---|
| State / province | washington |
|---|
| Formation | Extracaldera andesite-dacite dikes of Chowder Ridge and Dobbs Cleaver |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 2.2 |
|
1.8 |
2.6 |
Early Pleistocene |
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 61.05 | | WT% | XRF |
| TIO2 | 1.05 | | WT% | XRF |
| AL2O3 | 17.1 | | WT% | XRF |
| FEOT | 5.91 | | WT% | XRF |
| MNO | 0.17 | | WT% | XRF |
| MGO | 1.62 | | WT% | XRF |
| CAO | 6.03 | | WT% | XRF |
| NA2O | 4.72 | | WT% | XRF |
| K2O | 1.66 | | WT% | XRF |
| P2O5 | 0.29 | | WT% | XRF |
| LOI | 4.36 | | WT% | XRF |
