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LEUCOGRANITE [1 record]

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Alphabetical list of terms

Record 1 2011-01-17

English

Subject field(s)
  • Petrography
DEF

A rock containing less than 5% of mafites, having quartz enough to form between 5% and 50% of the leucocrates, and having an orthoclase to oligoclase-andesine ratio between 5 : 95 and 50 : 50.

CONT

Leucogranite differs from normal granite in the practical absence of mafic minerals. It therefore consists of quartz, orthoclase (microcline, microperthite, etc.), and a smaller amount of oligoclase or andesine ...

OBS

leucocratic granite: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
DEF

Granite riche en minéraux dits «blancs» (quartz, feldspaths ou feldspathoïdes), dans lequel les minéraux foncés occupent moins de 5 % de la surface.

OBS

granite leucocrate : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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