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Details van artikel 22 van 24 gevonden artikelen
| Titel: |
The role of mafic magmatism in age specification of Devonian continental trough deposits: evidence from the Minusa Basin, western Siberia, Russia |
| Auteur: |
Fedoseev G S |
| Verschenen in: |
Bulletin of geosciences |
| Paginering: | Jaargang 83 (2008) nr. 4 pagina's 473-480 |
| Jaar: |
2008 |
| Inhoud: |
In the Devonian the Minusa Intermountain Trough (Basin) of Siberia represented a rift structure that was filled with rocks which now occur as strata-like bodies interpreted to be of volcanic origin. The character of the mafic rocks including their upper contacts and geochronological dating, using Rb/Sr, 40Ar/39Ar, and U/Pb methods, suggests their sill or subvolcanic nature. Porphyry and dolerite sills and basalt formed later (385–405 Mya) than felsic and andesitic volcanic rocks (402–448 Mya). Because these bodies were earlier considered as volcanic flows, it is important to revise the geological succession of the Devonian formations dominated by mafic igneous rocks |
| Uitgever: |
Czech Geological Survey |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 22 van 24 gevonden artikelen
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