Sample 2070
NavDat sample number 12904 · SHOSHONITE
Sample
| Sample ID | 2070 |
|---|---|
| Rock name | SHOSHONITE |
| Rock type | VOLCANIC |
| Composition | MAFIC |
| Material | IGNEOUS |
Location
| Latitude | 45.2179 |
|---|---|
| Longitude | -110.23 |
| Location | Independence stock |
| State / province | Montana |
| Volcanic field | HAT low-K high alumina tholeiitic basaltic andesite through shoshonite to high-K dacite main phase |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 84 | 83 | 86 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 54.9 | WT% | DCP | |
| TIO2 | 0.83 | WT% | DCP | |
| AL2O3 | 16.2 | WT% | DCP | |
| FEOT | 7.54 | WT% | DCP | |
| MNO | 0.13 | WT% | DCP | |
| MGO | 4 | WT% | DCP | |
| CAO | 6.62 | WT% | DCP | |
| NA2O | 4.16 | WT% | DCP | |
| K2O | 2.84 | WT% | DCP | |
| P2O5 | 0.39 | WT% | DCP | |
| H2O_PLUS | 0.62 | WT% | DCP | |
| H2O_MINUS | 0.39 | WT% | DCP | |
| CO2 | 0.01 | WT% | DCP | |
| TOTAL | 99.1 | WT% | DCP | |
| NI | 61 | PPM | DCP | |
| CR | 81 | PPM | DCP | |
| RB | 88 | PPM | DCP | |
| SR | 1300 | PPM | DCP | |
| BA | 1900 | PPM | DCP | |
| PB | 17.7 | PPM | DCP | |
| U | 1.02 | PPM | DCP | |
| TH | 5 | PPM | DCP | |
| ZR | 131 | PPM | DCP | |
| LA | 32.8 | PPM | DCP | |
| CE | 70.1 | PPM | DCP | |
| ND | 54.7 | PPM | DCP | |
| SM | 7.11 | PPM | DCP | |
| EU | 1.76 | PPM | DCP | |
| GD | 5.86 | PPM | DCP | |
| DY | 3.78 | PPM | DCP | |
| Y | 23.7 | PPM | DCP | |
| YB | 1.96 | PPM | DCP |
References
- Meen, James K; Eggler, David H (1987) Petrology and geochemistry of the Cretaceous Independence Volcanic Suite, Absaroka Mountains, Montana; clues to the composition of the Archean sub-Montanan mantle; with Suppl. Data 87-10. Geological Society of America Bulletin, vol.98, no.2, pp.238-247, Feb 1987 doi:10.1130/0016-7606(1987)98<238:PAGOTC>2.0.CO;2