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DIAGRAMME AFM [3 records]

Record 1 2011-12-22

English

Subject field(s)
  • Statistical Graphs and Diagrams
  • Scientific Measurements and Analyses
  • Geochemistry
CONT

The total alkali-silica diagram: This plot, which is useful for the classification of volcanic rocks ..., is also useful for distinguishing between two types of parental magmas (or of magmatic rock series or trends): alkalic and tholeiitic ...

CONT

The TAS diagram can be used to depict "alkaline," "subalkaline," and probably "transitional" rocks, but not "calc-alkaline" or "high-alumina" rocks.

OBS

alkali-silica diagram; alkali-silica plot: terms used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • total alkali/silica diagram
  • total alkalies/silica diagram
  • alkali/silica diagram
  • total alkalies versus silica diagram
  • total alkali versus silica diagram
  • total alkalis vs. silica diagram
  • total alkalies vs. silica diagram
  • total alkalies vs. silica plot
  • total alkalis versus silica plot
  • total alkalies versus silica plot
  • alkali/silica plot

French

Domaine(s)
  • Diagrammes et graphiques (Statistique)
  • Mesures et analyse (Sciences)
  • Géochimie
CONT

Située au-dessus de la ligne de séparation des deux champs sur le diagramme alcalins-silice, [la série alcaline] peut être subdivisée en types hautement potassiques, moyennement potassiques ou sodiques. Il faut noter ici qu’il ne faut pas confondre les roches alcalines avec les roches peralcalines.

CONT

La discrimination entre les séries magmatiques se réalise grâce au diagramme TAS(Total des Alcalins vs Silice) et au diagramme AFM.

OBS

diagramme alcalis-silice : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Key term(s)
  • diagramme total des alcalins versus silice
  • diagramme des alcalins vs la silice

Spanish

Save record 1

Record 2 2009-03-19

English

Subject field(s)
  • Statistical Graphs and Diagrams
  • Scientific Measurements and Analyses
  • Geochemistry
DEF

A three-component, triangular graph used to show how metamorphic mineral assemblages vary as a function of rock composition within one metamorphic facies.

CONT

The three components plotted on AFM diagrams are derived from a tetragonal diagram, with species Al2O3, K2O, FeO, and MgO, and are ideal for showing mineral assemblage variations as a function of the composition of pelites.

OBS

AFM diagram: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Diagrammes et graphiques (Statistique)
  • Mesures et analyse (Sciences)
  • Géochimie
CONT

Diagramme triangulaire(à trois variables) pour les roches subalcalines. Le diagramme triangulaire est connu sous le nom de diagramme AFM. Il permet de définir avec finesse la nature des roches subalcalines et leur position dans les séries magmatiques.

OBS

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

Spanish

Save record 2

Record 3 2003-07-22

English

Subject field(s)
  • Petrography
DEF

A triangular diagram showing the simplified compositional character of metamorphic rocks and minerals by plotting the ... molecular quantities of the three components: A = A2O3 - (Na2O + K2O); C=CaO - 3.3 P2O5; and F = FeO + MgO + MnO.A+C+F (in mols) are recalculated to 100% ...

French

Domaine(s)
  • Pétrographie
CONT

Pour les roches magmatiques, les roches métamorphiques, et leurs minéraux, on utilise communément : le diagramme ACF [...] le diagramme A’KF [...] le diagramme AFM [...]

Spanish

Save record 3

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