nephelinite


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Related to nephelinite: Olivine nephelinite
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  • noun

Words related to nephelinite

an igneous rock consisting of nepheline and pyroxene

References in periodicals archive ?
Igneous bodies in the Wanikande-Wanakom area include dioritic rocks, micrograbbros, nepheline syenites, dolerites, basaltic sills, nephelinites, trachytes, and pyroclastics.
Subduction then stopped, preserving the diamonds which had formed, and later these were transported to the surface by non-kimberlitic magmas such as leucitite, melilitite, nephelinite, and basanite--"diamonds have been found in several diatremes and dikes with these compositions in eastern Australia" (Barron et al.
Carrier rocks are postulated to be nephelinite, basanite and leucitite.
Occurrence: In upper-mantle garnet-granulite xenoliths in olivine nephelinite.
These finding are significant because it shows that these extremely bizarre lavas and their parent magmas, nephelinites, were produced by melting of a typical upper mantle mineral assemblage without an extreme carbon content in the magma source," said geochemist Bernard Marty at the Centre de Recherches Petrographiques et Geochimiques in Nancy, France.