primary magma

primary magma

[′prī‚mer·ē ′mag·mə]
(geology)
A magma that originates below the earth's crust.
References in periodicals archive ?
In some igneous rocks, zircon crystals are seen in circular shape that is probably because of the absorption of edges of the crystals by the primary magma [4].
2013) Primary magmas at the volcanic front of the NE Japan arc: coeval eruption of crustal low-K tholeiitic and mantle-derived medium-K calc-alkaline basalts at Azuma Volcano.
Continued melting of over-thickened and dripping magnesium-rich crust, combined with fractionation of primary magmas, may have produced the hydrated magnesium-poor basalts necessary to provide a source of the tonalite-trondhjemite-granodiorite complexes.

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