lamprophyre

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lam·pro·phyre

 (lăm′prə-fīr′)
n.
A dark igneous rock, having porphyritic texture, in which both the phenocrysts and the matrix consist of hornblende, pyroxene, and biotite.

[German Lamprophyr : Greek lampros, clear (from lampein, to shine) + French porphyre, porphyry (from Old French porfire; see porphyry).]

lamprophyre

(ˈlæmprəˌfaɪə)
n
(Geological Science) any of a group of basic igneous rocks consisting of feldspathoids and ferromagnesian minerals, esp biotite: occurring as dykes and minor intrusions
[C19: from Greek lampros bright + -phyre, from porphyry]
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References in periodicals archive ?
Classification and Nomenclature of Volcanic Rocks, Lamprophyres, Carbonatites and Melilite Rocks.
1999): Mafic precursors, peraluminous granitoids, and late lamprophyres in the Avila batholith, A model for the generation of Variscan batholiths in Iberia.
Most of the ore bodies that make up the deposit are hosted by Upper Carboniferous to Middle Triassic carbonates, with igneous units in the area that is dominated by granodiorites, quartz diorites, quartz porphyries, and lamprophyres.
Mafic precursors, peraluminous granitoids, and late lamprophyres in the Avila batholith: A model for the generation of Variscan batholiths in Iberia.
This is a very important and exciting piece of the puzzle at Treasure Island as lamprophyres are an intrusive rock that are commonly associated with lode gold deposits in Archaean terranes around the world.
To establish definitively the age of the Antetezambato lamprophyres and thereby the age of the formation of the andradite crystals, the author is currently conducting isotope-geochronological analyses on selected specimens, the results of which should be available soon.
The Mesozoic mafic dykes of eastern Massachusetts consist of tholeiitic olivine-dolerite, transitional-alkalic dolerite, nenormative alkaline dolerite, and at least three identified alkaline lamprophyres (Ross 1992).
More leucocratic lamprophyres occur as veins within the thick basaltic sills and are made of abundant kaersutite and minor clinopyroxene phenocrysts in a groundmass that consists of alkaline feldspar and devitrified glass.
1979, Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites, and melilitic rocks: Recommendations and suggestions of the IUGS Subcommission on the Systematics of Igneous Rocks: Geology v.
The Discover Abitibi Initiative (DAI) recently released the results of a lamprophyre study, designed to determine the diamond bearing potential of lamprophyres in Timmins, Kirkland Lake and Timiskaming areas.
Moreover, it strikes parallel to numerous smaller dykes of lamprophyres and semilamprophyres.