The oxygen isotope composition of Karoo and Etendeka picrites: High δ18O mantle or crustal contamination?
Olivine and orthopyroxene phenocrysts from picrite and picrate basalt lavas and dykes (Mg# 64-80) from the Tuli and Mwanezi (Nuanetsi) regions of the ~180 Ma Karoo Large Igneous province (LIP) have δ18O values that range from 6.0 to 6.7 ‰ (Fig. 1), suggesting that they crystallized from magmas havin...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/10962/60774 https://link.springer.com/article/10.1007/s00410-015-1164-1 |