Lamprophyre wikipedia
TīmeklisUn lamprophyre est une roche magmatique filonienne, ferromagnésienne et potassique, à texture microgrenue. Le terme a été proposé pour la première fois par K.W. Gümbel en 1874 pour "des roches filoniennes sombres riches en mica noir et en feldspath". En 1896, H. Rosenbusch a étoffé cette famille en y ajoutant les … Lamprophyres (from Greek λαμπρός (lamprós) 'bright', and φύρω (phýro) 'to mix') are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica-undersaturated mafic or ultramafic rocks with high magnesium … Skatīt vairāk Modern science treats lamprophyres as a catch-all term for ultrapotassic mafic igneous rocks which have primary mineralogy consisting of amphibole or biotite, and with feldspar in the groundmass. Lamprophyres … Skatīt vairāk Rock considered lamprophyres to be part of a "clan" of rocks, with similar mineralogy, textures and genesis. Lamprophyres are similar to lamproites and kimberlites. … Skatīt vairāk The naming and classification of lamprophyres has had several revisions, and much argument within the geological community. Nicholas Rock and colleagues devoted much time to a complicated descriptive system of nomenclature which took after a … Skatīt vairāk Lamprophyres are a group of rocks containing phenocrysts, usually of biotite and amphibole (with bright cleavage surfaces), and Skatīt vairāk Lamprophyres are usually associated with voluminous granodiorite intrusive episodes. They occur as marginal facies to some granites, though … Skatīt vairāk • IUGS addendum • Igneous geology classification flowchart • List of alkaline rocks in the Americas Archived 2007-11-08 at the Skatīt vairāk
Lamprophyre wikipedia
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TīmeklisCarbonatite ( / kɑːrˈbɒnəˌtaɪt /) is a type of intrusive or extrusive igneous rock defined by mineralogic composition consisting of greater than 50% carbonate minerals. [1] … TīmeklisUltramafic (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta -igneous rocks with a very low silica content (less than 45%), generally >18% Mg O, high Fe O, low potassium, and are composed of usually greater than 90% mafic minerals (dark colored, high magnesium and iron content).
TīmeklisLamproites are characterized by the presence of widely varying amounts (5-90 vol.%) of the following primary phases (Mitchell & Bergman, 1991): iron-rich sanidine (typically … TīmeklisLamprophyre Lamproph y re [zu griechisch lamprós »leuchtend« und phýrein »vermischen«\], Singular Lamproph y r der , -s, Petrologie : Gruppe dunkler, feinkörniger Ganggesteine , vorwiegend aus Plagioklas und Alkalifeldspat als hellen sowie Biotit, diopsidischer Augit und Hornblende als dunklen Gemengteilen.
TīmeklisLamprophyre - Lamprophyre. Minette (en type lamprofyr), fra Jáchymov i Tjekkiet. Lamprophyres (fra græsk λαμπρός (lamprós) 'lyse' og φύρω (phýro) 'at blande') er usædvanlige, ultrapotassiske, store voluminøse sten, der primært forekommer som diger, lopolitter, lakolitter, bestande og små indtrængen.
TīmeklisLamprophyres 'bright', and φύρω 'to mix') are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica-undersaturated mafic or ultramafic rocks with high magnesium oxide, >3% potassium oxide, high sodium oxide, and high nickel and …
TīmeklisLamprophyres (uit het Grieks λαμπρός (Lampros) 'helder' en φύρω (phýro) 'mengen') zijn ongewoon, klein volume ultrapotassic stollingsgesteenten voornamelijk optreedt als dijken , lopoliths , laccoliet , voorraden , en kleine inbraken . guylain herveTīmeklisLAMPROPHYRES (from Gr. λαμπρός, bright, and the terminal part of the word porphyry, meaning rocks containing bright porphyritic crystals), a group of rocks containing phenocrysts, usually of biotite and hornblende (with bright cleavage surfaces), often also of olivine and augite, but not of felspar. guylaine williamsTīmeklisDefine lamprophyre. lamprophyre synonyms, lamprophyre pronunciation, lamprophyre translation, English dictionary definition of lamprophyre. n. A dark igneous rock, having porphyritic texture, in which both the phenocrysts and the matrix consist of hornblende, pyroxene, and biotite. boyds maroon pepper laminateTīmeklisKomatiite ( / koʊˈmɑːtiaɪt /) is a type of ultramafic mantle -derived volcanic rock defined as having crystallised from a lava of at least 18 … boyds londonTīmeklislamprophyre (plural lamprophyres) An uncommon, small-volume ultrapotassic igneous rock primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions. … boyds m1 carbine stockTīmeklisDen geologi Jersey er kendetegnet ved de Late proterozoiske Brioverian volcanics, den Cadomian Orogeny, og kun små tegn på senere indskud fra kambriske og Kvaternære perioder. Den slags klipper går fra konglomerat til skifer, vulkaniske, påtrængende og plutoniske stollende klipper i mange kompositioner og metamorfe klipper også, … guy laliberte facebookTīmeklisLamprophyre – vom griechischen λαµπρός = hell, glänzend und φύρω = vermengen, eingeführt durch Carl Wilhelm von Gümbel 1874 – sind eine recht ungewöhnliche … guyland cook