TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

ROCHE FELSIQUE [5 records]

Record 1 2012-07-04

English

Subject field(s)
  • Petrography
DEF

A fine-grained igneous rock comprised of light-coloured minerals, principally quartz and feldspar.

OBS

Felsite are usually acidic in composition.

French

Domaine(s)
  • Pétrographie
DEF

Roche hololeucocrate à feldspath alcalin et quartz.

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Roca ígnea de naturaleza ácida o intermedia, constitución entre grano fino y criptocristalina y que puede ser porfirítica.

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Record 2 2006-10-26

English

Subject field(s)
  • Petrography
  • Vulcanology and Seismology
OBS

As a noun, "volcanic" is plural in form.

Key term(s)
  • felsic volcanics

French

Domaine(s)
  • Pétrographie
  • Volcanologie et sismologie

Spanish

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Record 3 2005-07-11

English

Subject field(s)
  • Petrography
DEF

[A] compact, felsitic rock without phenocrysts, having the composition of quartz-porphyry or porphyry.

OBS

The term has also been used in an extended sense to cover all aphanitic rocks of granitic composition whether porphyritic or not.

French

Domaine(s)
  • Pétrographie
DEF

[...] roche felsique compacte et sans phénocristaux [...] ayant la composition du porphyre quartzifère.

OBS

Utilisé également dans un sens plus élargi pour désigner toutes les roches aphanitiques de composition granitique, qu’elles soient porphyriques ou non.

Spanish

Campo(s) temático(s)
  • Petrografía
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Record 4 2005-01-14

English

Subject field(s)
  • Petrography

French

Domaine(s)
  • Pétrographie

Spanish

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Record 5 2003-08-29

English

Subject field(s)
  • Petrography
CONT

A number of mechanisms have been suggested to give rise to the special circumstances that cause chromite to be the only liquidus phase. These include an increase in oxygen fugacity ..., changes in total pressure ..., and contamination of the magma through assimilation of salic country rocks ...

French

Domaine(s)
  • Pétrographie
CONT

On a proposé divers mécanismes pour expliquer les circonstances particulières qui font que la chromite soit la seule phase à atteindre le liquidus, notamment une augmentation de la fugacité de l’oxygène [...], des variations de la pression totale [...] et une contamination du magma par assimilation de roches felsiques des épontes [...]

Spanish

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