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DYKE ANNULAIRE [1 record]

Record 1 2011-02-07

English

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

A roughly circular dike that is vertical or inclined away from the center of the arc.

OBS

ring-fracture intrusion: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • ring-dike
  • ring-dyke
  • ring fracture intrusion

French

Domaine(s)
  • Volcanologie et sismologie
  • Pétrographie
CONT

La structure concentrique du massif est soulignée en outre par des dykes circulaires ou polygonaux, disposés en couronne plus ou moins continue à l’extérieur du batholite. Ces dykes annulaires («ring dykes») sont constitués par des roches analogues à celles du massif central, ou par les porphyres correspondants ou des laves, toutes ces roches pouvant être de chimisme analogue ou au contraire fortement différenciées.

OBS

filon annulaire; ring dyke : termes en usage à Ressources naturelles Canada-Secteur des sciences de la Terre.

Spanish

Campo(s) temático(s)
  • Vulcanología y sismología
  • Petrografía
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