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CALC-ALKALINE ROCK [1 record]

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Record 1 2004-08-24

English

Subject field(s)
  • Petrography
  • Geochemistry
DEF

[An] igneous rock in which the dominant feldspar is calcium-rich.

CONT

Calc-alkaline rocks tend to contain calcium-bearing ferromagnesian minerals - hornblende, augite, etc.

CONT

... Stanton (1978) ... considers the volcanic exhalative ores to be one continuous spectrum, which show a progressive geochemical evolution that accompanies that of the calc-alkaline rocks in island arcs.

PHR

Calc-alcaline intrusive rock.

French

Domaine(s)
  • Pétrographie
  • Géochimie
DEF

[...] roche [...] dont les proportions d'alcalins (Na + K) sont voisines ou égales aux proportions de Ca.

CONT

On parle de [...] roches calco-alcalines si elles contiennent des feldspaths potassiques et sodiques associés à des plagioclases [...]

PHR

Roche intrusive calco-alcaline.

Spanish

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