Definition of nephelinite in English:
nephelinite
noun ˈnɛf(ə)lɪnʌɪtˈnefələˌnīt
mass nounGeology A fine-grained basaltic rock containing nepheline in place of plagioclase feldspar.
Example sentencesExamples
- Another New Zealand locality for this type of nephelinite is in the Auckland Domain.
- Magma modelling showed that olivine nephelinite and basanite could form by different degrees of partial melting of the mantle source, with amphibole, garnet, olivine and clinopyroxene in the residuum.
- Geochemically, the pyroxene nephelinite is highly enriched in LILE compared with the first one.
- The lava flows within the pyroclasts are composed of nephelinite and phonolite.
- The composition studied has very low albite and is classified as transitional between olivine nephelinite and nepheline-rich basanite.