Sample 87/3-7
NavDat sample number 41078 · RHYOLITE
Sample
| Sample ID | 87/3-7 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 27.5 |
|---|---|
| Longitude | -107.83 |
| Location | El Divisadero |
| State / province | Chihuahua |
| Country | MEXICO |
| Location comment | W Chihuahua |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 27 | 24.3 | 29.7 |
Analyses
Whole Rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 74.1 | WT% | XRF | |
| TIO2 | 0.26 | WT% | XRF | |
| AL2O3 | 15.1 | WT% | XRF | |
| FEO | 0.6 | WT% | XRF | |
| MNO | 0.04 | WT% | XRF | |
| MGO | 0.23 | WT% | XRF | |
| CAO | 0.57 | WT% | XRF | |
| NA2O | 3.2 | WT% | XRF | |
| K2O | 6.3 | WT% | XRF | |
| P2O5 | 0.01 | WT% | XRF | |
| RB | 227 | PPM | XRF | |
| SR | 62.1 | PPM | XRF | |
| Y | 49 | PPM | XRF | |
| ZR | 201 | PPM | XRF | |
| NB | 24 | PPM | XRF | |
| CO | 9 | PPM | XRF | |
| LA | 50.7 | PPM | INAA | |
| CE | 113 | PPM | INAA | |
| SM | 7.4 | PPM | INAA | |
| EU | 0.96 | PPM | INAA | |
| TB | 0.67 | PPM | INAA | |
| DY | 5.22 | PPM | INAA | |
| YB | 3.62 | PPM | INAA | |
| SC | 3.1 | PPM | INAA | |
| CS | 3.23 | PPM | INAA | |
| HF | 7.8 | PPM | INAA | |
| BA | 963 | PPM | INAA | |
| TH | 21.5 | PPM | INAA | |
| SR87_SR86 | 0.71014 | MS | ||
| SR87_SR86 | 0.70609 | MS | ||
| ND143_ND144 | 0.512518 | MS |
References
- Albrecht, Achim; Goldstein, Steven L (2000) Effects of basement composition and age on silicic magmas across an accreted terrane-Precambrian crust boundary, Sierra Madre Occidental, Mexico. Journal of South American Earth Sciences, vol.13, no.3, pp.255-273, Jul 2000 doi:10.1016/S0895-9811(00)00014-6