Sample 2
NavDat sample number 11308 · DACITE
Sample
| Sample ID | 2 |
|---|---|
| Rock name | DACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | seriate, porphyritic; fine grained to microcrystalline holocrystalline matrix of plagioclase, quartz, Na sanidine; vesicles common, with flow foliation; phenocrysts of plagioclase, amphibole, and minor alkali feldspar, magnetite, and biotite |
Location
| Latitude | 42.7119 |
|---|---|
| Longitude | -107.428 |
| Location | Rattlesnake Hills |
| State / province | Wyoming |
| Volcanic field | SW dacite group |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 43.6 | 41.4 | 46.6 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 68.87 | WT% | XRF | |
| AL2O3 | 15.89 | WT% | XRF | |
| FE2O3 | 2.1 | WT% | XRF | |
| FEO | 0.79 | WT% | TIT | |
| CAO | 2.44 | WT% | XRF | |
| MGO | 0.55 | WT% | XRF | |
| NA2O | 5.41 | WT% | XRF | |
| K2O | 3.24 | WT% | XRF | |
| TIO2 | 0.31 | WT% | XRF | |
| MNO | 0.08 | WT% | XRF | |
| P2O5 | 0.18 | WT% | XRF | |
| H2O | 0.23 | WT% | PENFIELD | |
| TOTAL | 100.09 | WT% | XRF | |
| RB | 91 | PPM | XRF | |
| SR | 1439 | PPM | XRF | |
| Y | 26 | PPM | XRF | |
| ZR | 318 | PPM | XRF | |
| LA | 27 | PPM | XRF | |
| CE | 66 | PPM | NAA | |
| ND | 40 | PPM | NAA | |
| SM | 6.5 | PPM | NAA | |
| EU | 1.9 | PPM | NAA | |
| TB | -1 | PPM | NAA | |
| DY | 4 | PPM | NAA | |
| YB | 2 | PPM | NAA | |
| LU | 0.2 | PPM | NAA | |
| LA | 31 | PPM | NAA | |
| U | 5.2 | PPM | NAA | |
| TH | 10 | PPM | NAA | |
| CU | 6 | PPM | AAS | |
| CR | 17 | PPM | AAS | |
| NI | 36 | PPM | AAS | |
| ZN | 65 | PPM | AAS |