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CLIVAGE EVENTAIL [2 records]

Record 1 2011-02-09

English

Subject field(s)
  • Tectonics
DEF

Schistosity parallel to the fold median within the hinge, but becoming oblique within the limbs.

CONT

The northeastern termination of the Oldham anticline is characterized by (1) a conical fold, (2) saddle reef auriferous veins, (3) divergent and convergent cleavage fans, (4) a downdip lineation on the slaty cleavage defined by biotitic mineral aggregates inferred to have developed during fold growth.

OBS

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

PHR

Convergent, divergent cleavage fan.

French

Domaine(s)
  • Tectonique
CONT

La terminaison nord-est de l'anticlinal d'Oldham est caractérisée par : (1) un pli conique, (2) des veines aurifères apicales, (3) des éventails de clivage divergents et convergents, (4) une linéation en aval-pendage sur le clivage schisteux défini par des agrégats de minéraux à biotite, lesquels se seraient développés durant la croissance du pli.

OBS

[...] une schistosité de fracture présente généralement une allure en éventail; l'importance de l'éventail dépend de la lithologie et du type de plissement; il peut exceptionnellement atteindre 90°.

OBS

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

Spanish

Save record 1

Record 2 2009-02-23

English

Subject field(s)
  • Tectonics
CONT

In some natural systems the cleavage will not have even the more complex relationship to folds as seen by fanning cleavage. Particularly in folds associated with strike-slip regimes.

OBS

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

Key term(s)
  • fan-like cleavage
  • fanlike schistosity

French

Domaine(s)
  • Tectonique
OBS

clivage en éventail; fracture en éventail : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 2

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