Sample YAB 93-96
NavDat sample number 31663 · BASALT
Sample
| Sample ID | YAB 93-96 |
|---|---|
| Rock name | BASALT |
| Rock type | VOLCANIC |
| Composition | MAFIC |
| Material | IGNEOUS |
| Comment | Volcanic center with numerous dikes. Amphibole megacrysts numerous; mantle xenoliths rare. |
Location
| Latitude | 36 |
|---|---|
| Longitude | -114.75 |
| Location | U.S. 93 |
| State / province | Nevada |
| Volcanic field | Lake Mead area |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 4.47 | 4.3 | 4.64 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 44.05 | WT% | ICP | |
| AL2O3 | 15.52 | WT% | ICP | |
| FEO | 10.46 | WT% | ICP | |
| CAO | 9.07 | WT% | ICP | |
| MGO | 5.88 | WT% | ICP | |
| NA2O | 3.08 | WT% | ICP | |
| K2O | 2.8 | WT% | ICP | |
| TIO2 | 3.02 | WT% | ICP | |
| MNO | 0.15 | WT% | ICP | |
| P2O5 | 0.78 | WT% | ICP | |
| CR | 103 | PPM | INAA | |
| CO | 25 | PPM | INAA | |
| SC | 15.2 | PPM | INAA | |
| HF | 7.16 | PPM | INAA | |
| TH | 6.08 | PPM | INAA | |
| TA | 4.81 | PPM | INAA | |
| LA | 53.1 | PPM | INAA | |
| CE | 107 | PPM | INAA | |
| SM | 8.5 | PPM | INAA | |
| EU | 2.3 | PPM | INAA | |
| YB | 2.1 | PPM | INAA | |
| LU | 0.3 | PPM | INAA | |
| SR | 1020 | PPM | AAS | |
| RB | 34 | PPM | AAS | |
| BA | 880 | PPM | AAS | |
| NI | 66 | PPM | AAS | |
| NB | 68 | PPM | XRF | |
| ZR | 285 | PPM | XRF |
References
- Feuerbach, Dan L; Smith, Eugene I; Walker, J D; Tangeman, J A (1993) The role of the mantle during crustal extension; constraints from geochemistry of volcanic rocks in the Lake Mead area, Nevada and Arizona. Geological Society of America Bulletin, vol.105, no.12, pp.1561-1575, Dec 1993 doi:10.1130/0016-7606(1993)105<1561:TROTMD>2.3.CO;2