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Leucogranite

Leucogranite: En géologie, les leucogranites sont parmi les plus jeunes roches intrusives sur terre liées au phénomène d'anatexie dans la croûte continentale. On les trouve le plus souvent dans les séquences de grauwacke qui ont été basculées durant les collisions continentales. Ils sont nombreux par exemple dans l'Himalaya.

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Portail des minéraux et roches

Catégorie :
Roche plutonique

leucogranite — * * * ● leucogranite nom masculin Roche plutonique essentiellement à quartz et feldspath … Encyclopédie Universelle
Leucogranite — In geology, leucogranites are amongst the youngest intrusions related to anatexis of continental crust anywhere in the world. Leucogranites are commonly found in deformed metapelitic/metagraywacke sequences that have been thrusted over basements… … Wikipedia
leucogranite — noun An intrusion of the continental crust subject to anatexis … Wiktionary
Geology of the Australian Capital Territory — Australia grew around three fused pieces of very ancient continental crust (cratons). The geology of the Australian Capital Territory includes rocks dating from the Ordovician around 480 million years ago, whilst most rocks are from the Silurian … Wikipedia
Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… … Wikipedia

Granito orbicular — Orbiculita Granito orbicular cerca de Caldera, Chile.. General Tipo Ígnea Tamaño grano … Wikipedia Español
Ultrapotassic igneous rocks — are a class of rare, volumetrically minor generally ultramafic or mafic silica depleted igneous rocks. Ultrapotassic rocks are defined by molar K2O/Na2O >3 in much of the scientific literature. In other papers written as recently as 2005, they… … Wikipedia
Split Mountain (Sierra Nevada) — Infobox Mountain Name = Split Mountain Photo = Split Mountain.jpg Caption = Sunrise on Split Mountain s east face, September 2004. Elevation = Convert|14064|ft|m|0cite web url=http://www.ngs.noaa.gov/cgi bin/ds mark.prl?PidBox=HR2616 title =… … Wikipedia
Cadomian Orogeny — The Cadomian Orogeny was a tectonic event or series of events in the late Neoproterozoic, about 650 550 Ma, which probably included the formation of mountains. This occurred on the margin of the Gondwana continent, involving one or more… … Wikipedia

Al2SiO4(F,OH)2 — Topaze (minéral) Pour les articles homonymes, voir Topaze. Topaze Catégorie IX : silicates … Wikipédia en Français