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CALCIUM-POOR AUGITE [1 record]

Record 1 2008-06-16

English

Subject field(s)
  • Mineralogy
  • Geochemistry
CONT

Thick dykes have coarse-grained interiors that show some fractionation but variations in bulk chemical composition are relatively modest. Olivine ..., plagioclase ..., and low-Ca augite are the principal silicate minerals.

French

Domaine(s)
  • Minéralogie
  • Géochimie
CONT

Les basaltes tholéiitiques sont saturés, mésocrate, à labrador-bytownite, augite peu calcique, [...] olivine absente ou très rare, et SiO2 exprimé sous forme de quartz ou tridymite.

CONT

Les intérieurs des dykes épais sont à grain grossier et exhibent un certain fractionnement, cependant les variations de la composition chimique globale sont restreintes. Les principaux minéraux silicatés sont : olivine [...], plagioclase [...] et une augite pauvre en Ca.

OBS

augite peu calcique : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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