Sample 2048
NavDat sample number 12914 · ANDESITE
Sample
| Sample ID | 2048 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
Location
| Latitude | 45.2179 |
|---|---|
| Longitude | -110.23 |
| Location | Independence volcanic suite |
| State / province | Montana |
| Volcanic field | HAB high-magnesium andesite to banakite early phase |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 92 | 90 | 94 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 58.4 | WT% | DCP | |
| TIO2 | 0.64 | WT% | DCP | |
| AL2O3 | 15 | WT% | DCP | |
| FEOT | 5.93 | WT% | DCP | |
| MNO | 0.11 | WT% | DCP | |
| MGO | 6.91 | WT% | DCP | |
| CAO | 6.44 | WT% | DCP | |
| NA2O | 3.82 | WT% | DCP | |
| K2O | 1.62 | WT% | DCP | |
| P2O5 | 0.47 | WT% | DCP | |
| H2O_PLUS | 0.44 | WT% | DCP | |
| H2O_MINUS | 0.32 | WT% | DCP | |
| CO2 | 0.01 | WT% | DCP | |
| TOTAL | 100.5 | WT% | DCP | |
| NI | 162 | PPM | DCP | |
| CR | 526 | PPM | DCP | |
| RB | 32 | PPM | DCP | |
| SR | 854 | PPM | DCP | |
| BA | 1230 | PPM | DCP | |
| PB | 10.3 | PPM | DCP | |
| U | 1.18 | PPM | DCP | |
| TH | 2.76 | PPM | DCP | |
| ZR | 97 | PPM | DCP | |
| LA | 24.3 | PPM | DCP | |
| CE | 50.1 | PPM | DCP | |
| ND | 22.9 | PPM | DCP | |
| SM | 3.66 | PPM | DCP | |
| EU | 1.09 | PPM | DCP | |
| GD | 3.86 | PPM | DCP | |
| DY | 2.17 | PPM | DCP | |
| Y | 12.8 | PPM | DCP | |
| YB | 1.16 | PPM | DCP | |
| RB87_SR86 | 0.125 | MS-ID | ||
| SR87_SR86 | 0.70522 | TIMS |
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