Sample 2055
NavDat sample number 12918 · ANDESITE
Sample
| Sample ID | 2055 |
|---|---|
| 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 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 | 59.2 | WT% | DCP | |
| TIO2 | 0.68 | WT% | DCP | |
| AL2O3 | 16 | WT% | DCP | |
| FEOT | 5.75 | WT% | DCP | |
| MNO | 0.09 | WT% | DCP | |
| MGO | 5.15 | WT% | DCP | |
| CAO | 5.65 | WT% | DCP | |
| NA2O | 3.9 | WT% | DCP | |
| K2O | 1.95 | WT% | DCP | |
| P2O5 | 0.21 | WT% | DCP | |
| H2O_PLUS | 0.32 | WT% | DCP | |
| H2O_MINUS | 0.47 | WT% | DCP | |
| CO2 | 0.01 | WT% | DCP | |
| TOTAL | 99.8 | WT% | DCP | |
| NI | 50 | PPM | DCP | |
| CR | 320 | PPM | DCP | |
| RB | 48 | PPM | DCP | |
| SR | 813 | PPM | DCP | |
| BA | 1450 | PPM | DCP | |
| PB | 14.9 | PPM | DCP | |
| U | 0.69 | PPM | DCP | |
| TH | 1.68 | PPM | DCP | |
| ZR | 73 | PPM | DCP | |
| LA | 42.6 | PPM | DCP | |
| CE | 97.6 | PPM | DCP | |
| ND | 49 | PPM | DCP | |
| SM | 7.84 | PPM | DCP | |
| EU | 1.69 | PPM | DCP | |
| GD | 7.02 | PPM | DCP | |
| DY | 4.61 | PPM | DCP | |
| Y | 25.4 | PPM | DCP | |
| YB | 2.22 | PPM | DCP | |
| RB87_SR86 | 0.11 | MS-ID | ||
| SR87_SR86 | 0.70558 | TIMS | ||
| SM147_ND144 | 0.097 | MS-ID | ||
| ND143_ND144 | 0.51151 | 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