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Abstract Low δ18O magmas (with δ18O values of 78, with element compositions and δ18O values (4.87 ± 0.38‰, 2SD) to similar those of the olivine in basalts. The other group of olivines… Click to show full abstract
Abstract Low δ18O magmas (with δ18O values of 78, with element compositions and δ18O values (4.87 ± 0.38‰, 2SD) to similar those of the olivine in basalts. The other group of olivines exhibits Fo 6‰), indicating that later magmatic evolution of low δ18O magma toward high δ18O values was probably a result of the leaching of high δ18O fluid from the upper continental crust. Our study of olivines provide vital information for systematic understanding of magmatism in epicontinental back-arc basins compared to that in intra-oceanic settings.
Journal Title: Lithos
Year Published: 2020
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