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CLIVAGE SCHISTEUX [1 record]

Record 1 2010-12-19

English

Subject field(s)
  • Petrography
  • Tectonics
DEF

The foliation in schist or other coarse-grained, crystalline rock due to the parallel alignment of platy mineral grains (mica) or inequant crystals of other minerals.

CONT

This deposit [has] been affected by postmineralization deformation that has imparted schistosity to [its] host sequences.

OBS

It is considered by some to be a type of cleavage.

OBS

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

French

Domaine(s)
  • Pétrographie
  • Tectonique
DEF

Processus tectonique conduisant à l'acquisition d'un débit en feuillets parallèles, sensiblement perpendiculaire à la contrainte principale maximale.

CONT

Sous l'action de la charge des sédiments et des phénomènes orogéniques, les roches se débitent en feuillets plus ou moins réguliers indépendants de la stratification : c'est la schistosité ou clivage schisteux.

CONT

En profondeur, dans l'infrastructure, on rencontre des plis [...] accompagnés de schistosité puis, plus profondément, de foliation [...]

OBS

Une schistosité dans laquelle se développent des minéraux métamorphiques synschisteux est une foliation.

OBS

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

Spanish

Campo(s) temático(s)
  • Petrografía
  • Tectónica
DEF

Carácter laminar de las rocas que pueden ser exfoliadas, o sea separadas en forma de láminas delgadas, como lo son las pizarras.

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