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Sample WBD-12/819.8
NavDat sample number 11116 · TRACHYTE
Sample
| Sample ID | WBD-12/819.8 |
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| Rock name | TRACHYTE |
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| Rock type | VOLCANIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Comment | occurs only as small dikes in shallow subsurface; metasomatized; holocrystalline, moderately calcareous, and variably porphyritic; pseudoleucite phenocrysts in aphanitic groundmass of sanidine, albite, analcime, biotite, and strontian calcite |
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Location
| Latitude | 44.5092 |
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| Longitude | -104.367 |
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| Location | Bear Lodge Mountains; drill core |
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| State / province | Wyoming |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
38 |
50 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 42.77 | | WT% | XRF |
| AL2O3 | 13.52 | | WT% | XRF |
| FE2O3T | 9.27 | | WT% | XRF |
| MGO | 2.95 | | WT% | XRF |
| CAO | 9.47 | | WT% | XRF |
| NA2O | 0.74 | | WT% | XRF |
| K2O | 9.81 | | WT% | XRF |
| TIO2 | 1.97 | | WT% | XRF |
| P2O5 | 0.65 | | WT% | XRF |
| MNO | 0.38 | | WT% | XRF |
| TOTAL | 91.53 | | WT% | XRF |
