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Sample JH7
NavDat sample number 37524 · DACITE
Sample
| Sample ID | JH7 |
|---|
| 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 | 43.5447 |
|---|
| Longitude | -110.793 |
|---|
| Location | quarry at base of N end of West Gros Ventre Butte |
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| 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 | 68.06 | | WT% | XRF |
| AL2O3 | 15.67 | | WT% | XRF |
| TIO2 | 0.504 | | WT% | XRF |
| FEOT | 3.6 | | WT% | XRF |
| MNO | 0.066 | | WT% | XRF |
| CAO | 3.7 | | WT% | XRF |
| MGO | 0.86 | | WT% | XRF |
| K2O | 2.42 | | WT% | XRF |
| NA2O | 4.15 | | WT% | XRF |
| P2O5 | 0.152 | | WT% | XRF |
| NI | 6 | | PPM | XRF |
| CR | 7 | | PPM | XRF |
| SC | 9 | | PPM | XRF |
| V | 50 | | PPM | XRF |
| BA | 864 | | PPM | XRF |
| RB | 57 | | PPM | XRF |
| SR | 239 | | PPM | XRF |
| ZR | 172 | | PPM | XRF |
| Y | 27 | | PPM | XRF |
| NB | 12.2 | | PPM | XRF |
| GA | 19 | | PPM | XRF |
| CU | 5 | | PPM | XRF |
| ZN | 59 | | PPM | XRF |
| PB | 15 | | PPM | XRF |
| LA | 39 | | PPM | XRF |
| CE | 83 | | PPM | XRF |
| TH | 13 | | PPM | XRF |
| SR87_SR86 | 0.709265 | | | MS |
| ND143_ND144 | 0.511547 | | | MS |
| PB208_PB204 | 39.093 | | | MS |
| PB207_PB204 | 15.583 | | | MS |
| PB206_PB204 | 17.352 | | | MS |
