New insight into the origin of the low δ^(18)O magmas in Iceland
Iceland contains abundant low δ^(18)O volcanic rocks, reflecting ^(18)O-depleted sources and/or crustal contamination by assimilation and/or mixing with crustal melts. Previous attempts to distinguish among these mechanisms have been based principally on oxygen isotope measurements of whole-rocks,...
| Published in: | Geochimica et Cosmochimica Acta |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
| Published: |
Elsevier
2003
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| Subjects: | |
| Online Access: | https://doi.org/10.1016/S0016-7037(03)00515-5 |
| Summary: | Iceland contains abundant low δ^(18)O volcanic rocks, reflecting ^(18)O-depleted sources and/or crustal contamination by assimilation and/or mixing with crustal melts. Previous attempts to distinguish among these mechanisms have been based principally on oxygen isotope measurements of whole-rocks, glasses, or mixed populations of phenocrysts. Here we add further constraints from micro-analyses of individual phenocrysts and xenocrysts. © 2003 Published by Elsevier Ltd. |
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