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Sample CoV-72
NavDat sample number 21711 · BASALTIC-ANDESITE
Sample
| Sample ID | CoV-72 |
|---|
| Rock name | BASALTIC-ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
Location
| Latitude | 37.25 |
|---|
| Longitude | -106.5 |
|---|
| State / province | Colorado |
|---|
| Volcanic field | southeast San Juan volcanic field |
|---|
| Formation | Conejos Formation |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 29.1 |
|
28.7 |
29.5 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 57.9 | | WT% | XRF |
| TIO2 | 0.92 | | WT% | XRF |
| AL2O3 | 16.54 | | WT% | XRF |
| FEO | 8.07 | | WT% | XRF |
| MNO | 0.12 | | WT% | XRF |
| MGO | 2.55 | | WT% | XRF |
| CAO | 5.56 | | WT% | XRF |
| NA2O | 3.51 | | WT% | XRF |
| K2O | 2.99 | | WT% | XRF |
| P2O5 | 0.37 | | WT% | XRF |
| Y | 29 | | PPM | XRF |
| ZR | 215 | | PPM | XRF |
| NB | 11 | | PPM | XRF |
| V | 143 | | PPM | XRF |
| CR | 9 | | PPM | INAA |
| NI | 27 | | PPM | XRF |
| RB | 76 | | PPM | INAA |
| SR | 616 | | PPM | INAA |
| BA | 811 | | PPM | XRF |
| PB206_PB204 | 17.794 | | | MS |
| PB207_PB204 | 15.498 | | | MS |
| PB208_PB204 | 37.368 | | | MS |
| SR87_SR86 | 0.70501 | | | MS |
| ND143_ND144 | 0.51227 | | | MS |
References
- Colucci, M T; Dungan, M A; Ferguson, K M; Lipman, Peter W; Moorbath, Stephen (1991) Precaldera lavas of the Southeast San Juan volcanic field; parent magmas and crustal interactions. Journal of Geophysical Research, B, Solid Earth and Planets. 96; 8, Pages 13,413-13,434. 1991. . doi:10.1029/91JB00282
