Lamprophyres (from Ancient Greek λαμπρός (lamprós) 'bright' and φύρω (phúrō) 'to mix') are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, …

May 11, 2019 · Lamprophyre is ultrapotassic igneous rock that is occurring as dikes, lopoliths, loccoliths, stocks and small intrussion. It is alkaline silica-undersaturated mafic or ultramafic …

lamprophyre, any of a group of dark gray to black intrusive igneous rocks that generally occur as dikes (tabular bodies inserted in fissures). Such rocks are characterized by a porphyritic …

A rare variety of ultramafic lamprophyre consisting of combinations of forsteritic olivine, diopsidic pyroxenes, various amphiboles and phlogopite in a matrix of similar minerals with abundant …

Lamprophyres (from the Greek lampros, ‘glistening’ + porphyros ‘porphyry’) are rare and poorly understood ultrapotassic hypabissal rocks that occur only as dikes. Even though they share …

A group of hypabyssal igneous rocks characterised by abundant primary hydrous silicates (usually amphiboles or biotite) in phenocryst s and/ or groundmass, lacking felsic phenocrysts, and …

Oct 20, 2021 · Proterozoic to Cenozoic lamprophyres, lamproites and related rock types hold a unique potential for the investigation of processes affecting mantle reservoirs. They originated …

Sep 1, 1977 · Lamprophyres are porphyritic dyke-rocks, readily recognisable in the field, which seemed to have become enveloped in petrological mystery because of their scattered and …

s, Classification 1.1 A brief history of lamprophyre research To an uncomfortably large number of geologists, the term 'Iamprophyre' conjures up predominantly negative images: of rotten dykes …

To an uncomfortably large number of geologists, the term ‘lamprophyre’ conjures up predominantly negative images: of rotten dykes forming miniscule, impersistent outcrops; of …