Abstract
The elevated uranium levels in Devonian acid volcanites are syngenetic. The contrasty volcanic series has a single common Rb-Sr isochron corresponding to 413±13 My and indicates a single magmatic source for the acid and basic effusives. The original Sr ratio in the magma source was 0.7043±0.0006 and corresponds to the range of similar values for island-arc basalts (0.7033-0.7051). It is assumed that the generation of the magmas involved mantle material. -Journal summary
Original language | English |
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Pages (from-to) | 69-79 |
Number of pages | 11 |
Journal | Geochemistry International |
Volume | 25 |
Issue number | 7 |
Publication status | Published - 1988 |
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics