nephelinite


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Related to nephelinite: Olivine nephelinite

nephelinite

[ne′fel·ə‚nīt]
(petrology)
A dark-colored, aphanitic rock of volcanic origin, composed essentially of nepheline and pyroxene; texture is usually porphyritic with large crystals of augite and nepheline in a very-fine-grained matrix.
References in periodicals archive ?
Lherzolite, harzburgite, dunite mantle xenoliths, and xenocrystic debris are common and abundant in the ankaratrites and nephelinites [54] from eastern ASV (Figure 3).
The generation of the ASV nephelinites maybe modelled for 4-6% degrees of partial melting, with crystallization temperatures between 1200 and 1000[degrees]C from garnet peridotite sources [10, 55].