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Sample JH12
NavDat sample number 37523 · DACITE
Sample
| Sample ID | JH12 |
|---|
| Rock name | DACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | plagioclase phenocrysts along with hypersthene; groundmass ranges from nearly holocrystalline comprised of small plagioclase laths to nearly holohyaline comprised of dark brown glass; disequilibrium features similar to the trachyandesites |
|---|
Location
| Latitude | 43.5217 |
|---|
| Longitude | -110.807 |
|---|
| Location | outcrop on W side of gully south of Hansen Peak |
|---|
| State / province | Wyoming |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 6 |
|
3 |
10 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 66.49 | | WT% | XRF |
| AL2O3 | 16.36 | | WT% | XRF |
| TIO2 | 0.595 | | WT% | XRF |
| FEOT | 3.67 | | WT% | XRF |
| MNO | 0.048 | | WT% | XRF |
| CAO | 4.3 | | WT% | XRF |
| MGO | 0.68 | | WT% | XRF |
| K2O | 2.42 | | WT% | XRF |
| NA2O | 4.15 | | WT% | XRF |
| P2O5 | 0.191 | | WT% | XRF |
| NI | 7 | | PPM | XRF |
| CR | 1 | | PPM | XRF |
| SC | 7 | | PPM | XRF |
| V | 56 | | PPM | XRF |
| BA | 844 | | PPM | XRF |
| RB | 62 | | PPM | XRF |
| SR | 270 | | PPM | XRF |
| ZR | 160 | | PPM | XRF |
| Y | 30 | | PPM | XRF |
| NB | 11.1 | | PPM | XRF |
| GA | 21 | | PPM | XRF |
| CU | 10 | | PPM | XRF |
| ZN | 60 | | PPM | XRF |
| PB | 20 | | PPM | XRF |
| LA | 44 | | PPM | XRF |
| CE | 79 | | PPM | XRF |
| TH | 10 | | PPM | XRF |
| SR87_SR86 | 0.710403 | | | MS |
| ND143_ND144 | 0.511508 | | | MS |
| PB208_PB204 | 40.019 | | | MS |
| PB207_PB204 | 15.527 | | | MS |
| PB206_PB204 | 16.908 | | | MS |
