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Isotopic constraints on the crustal evolution of southwestern Montana
Gunn, Susan Helen (1991) Isotopic constraints on the crustal evolution of southwestern Montana.
| Authors | Gunn, Susan Helen |
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| Year | 1991 |
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| Title | Isotopic constraints on the crustal evolution of southwestern Montana |
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| Pages | 204 |
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| GeoRef | 1992-058048 |
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| Keywords | absolute age; Archean; basement; crust; dates; emplacement; evolution; geochemistry; geochronology; Helena Embayment; intrusions; isochrons; isotopes; magmas; Montana; plutons; Precambrian; Rb/Sr; Sm/Nd; southwestern Montana; tectonophysics; United States; whole rock |
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39 samples from this reference
| Sample | Rock name | Major | Trace | Isotope |
|---|
| 9A | Granodiorite |
yes | yes | yes |
| 9B | Granodiorite |
yes | yes | yes |
| 9C | Granodiorite |
yes | yes | yes |
| 9D | Tonalite |
yes | yes | yes |
| 10C | Granodiorite |
yes | yes | yes |
| 13C | Granodiorite |
yes | yes | yes |
| 14B | Granite |
yes | yes | yes |
| 14C | Granodiorite |
yes | yes | yes |
| 14D | Granodiorite |
yes | yes | yes |
| 15C | Monzonite |
yes | yes | yes |
| 12A | Diorite |
yes | yes | yes |
| 12B | Tonalite |
yes | yes | yes |
| 12C | Granodiorite |
yes | yes | yes |
| 13A | Gabbro |
yes | yes | yes |
| 13B | Anorthosite |
yes | yes | yes |
| 14A | Gabbro |
yes | yes | yes |
| 9F | Granodiorite |
yes | yes | yes |
| 15A | Diorite |
yes | yes | yes |
| 5C | Granodiorite |
yes | yes | yes |
| 6A | Granodiorite |
yes | yes | yes |
| 4B | Granodiorite |
yes | yes | yes |
| 3A | Monzonite |
yes | yes | yes |
| 11B | Granodiorite |
yes | yes | yes |
| 11C | Granodiorite |
yes | yes | yes |
| 11A | Granodiorite |
yes | yes | yes |
| 4C | Granodiorite |
yes | yes | yes |
| 6B | Granodiorite |
yes | yes | yes |
| 6C | Granodiorite |
yes | yes | yes |
| 6D | Granodiorite |
yes | yes | yes |
| 7A | Granodiorite |
yes | yes | yes |
| 8B | Gabbro |
yes | yes | yes |
| 8C | Granodiorite |
yes | yes | yes |
| 5A | Granodiorite |
yes | yes | yes |
| 5B | Granodiorite |
yes | yes | yes |
| 17B | Granite |
yes | yes | yes |
| 17C | Granodiorite |
yes | yes | yes |
| 18C | Tonalite |
yes | yes | yes |
| 17D | Tonalite |
yes | yes | yes |
| 4A | Monzonite |
yes | yes | yes |
