Definition of lamprophyre in English:
lamprophyre
nounˈlamprəˌfʌɪəˈlamprəˌfī(ə)r
mass nounGeology A porphyritic igneous rock consisting of a fine-grained feldspathic groundmass with phenocrysts chiefly of biotite.
Example sentencesExamples
- Remelting of these metasomites produced the Gardar lamprophyre magmas.
- The only known igneous rocks in the area are Permian periodotite and lamprophyre dikes as well as diatremes of ultramafic composition associated with the Fluorite district.
- Melts of these metasomites were volatile rich and hence ascended rapidly through the lithosphere, forming the lamprophyre magmas.
- Subordinate volumes of carbonatite and lamprophyre magmas are also present.
- It has also been found in silica-poor igneous rocks, such as syenite, nepheline syenite, serpentinite, and lamprophyre.
Origin
Late 19th century: from Greek lampros 'bright, shining' + porphureos 'purple'.