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VARIATION CHIMIQUE [1 record]

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Record 1 2001-07-04

English

Subject field(s)
  • Geochemistry

French

Domaine(s)
  • Géochimie
CONT

L'observation sur le terrain d'un ensemble métamorphisé et la notion même de migmatite suggèrent une variation chimique de substance que l'analyse vient confirmer. [...] il s'agit d'échange d'éléments, du remplacement d'une molécule, d'un atome ou d'un ion par un autre [...] Alors que les variations de composition chimique des roches sont notables à l'intérieur des roches superficielles, on constate une homogénéisation des faciès au fur et à mesure que l'on s'enfonce.

Spanish

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