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MAGNESIAN OLIVINE [1 record]

Record 1 2011-12-22

English

Subject field(s)
  • Petrography
  • Geochemistry
CONT

Compared with the basalts from the stratified flows, the volcanic rocks of the cones have more magnesian olivine (Mg [content] equal to 64-74 for phenocrysts and 63-65 for microlites) ...

French

Domaine(s)
  • Pétrographie
  • Géochimie
CONT

L’olivine ou péridot doit son nom à sa couleur vert olive (lorsqu’elle n’est pas altérée). Il s’agit d’un groupe de silicates le plus généralement représenté par un ensemble allant d’un pôle magnésien à un pôle riche en fer. L’olivine magnésienne est le principal constituant des roches issues du manteau supérieur [...]

Spanish

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