Albitophyre

albitophyre

[al′bid·ə‚fīr]
(petrology)
A porphyritic rock that contains albite phenocrysts in a groundmass composed mostly of albite.

Albitophyre

 

(also keratophyre), a magmatic rock of porphyritic structure. Porphyritic formations and the tiniest crystals or microlites of the predominant rock mass appear as albite. Albitophyres are formed in the metamorphosis of a lava stream of trachyte and andesite. They are commonly found among ancient effusive formations of the Urals, Kazakhstan, and the Caucasus.

References in periodicals archive ?
5) Quartz veins of tubular shape invading diabase and albitophyre dikes; generally not crystal-bearing.
This sequence consists, above the Cyclic Units, of gabbro, diorite, and it is cut by a swarm of dykes and masses of finegrained dolerites and albitophyres (FIGURE 3).