TERMIUM Plus®

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

SHEETED DIKE COMPLEX [1 record]

Record 1 2010-12-23

English

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

A sheeted dyke complex is a normal component of an ophiolite, a piece of oceanic crust that has been emplaced within a sequence of continental rocks. The dykes act as feeders for the overlying sequence of extrusive rocks typically pillow lavas, together forming layer 2 of the oceanic crust. As each injection of a dyke represents one increment of seafloor spreading, each dyke is normally intruded into earlier dykes. The dykes are typically dolerites but plagiogranites (trondhjemites) often form a significant part of the complex.

CONT

In the sheeted dike complex, each dike intrudes older dikes, and the very first dikes formed may be on opposite sides of an ocean. The sheeted dike complex is the smoking gun of an ophiolite. Other ophiolite rocks can form in other settings, but a sheeted dike complex requires continuous crustal spreading to form.

CONT

The McLaughlin deposit is centered around the sheeted vein complex, a large multistage vein swarm, localized in a dilation zone formed by rheologic contrasts in the footwall polymictic melange. The surface expression of the sheeted vein complex is a subaerial sinter terrace, which merges into the sheeted vein complex.

OBS

sheeted dyke complex: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
  • Volcanologie et sismologie
CONT

Les gisements de type Chypre se localisent essentiellement dans des complexes ophiolitiques, où des basaltes coussinés recouvrent des complexes de dykes en feuillets, qui recouvrent un complexe intrusif gabbroïque dont la composition devient de plus en plus ultramafique à la base pour devenir des péridotites.

CONT

Complexe de dykes feuilletés, près du lac de l'Est. Tous les dykes sont boninitiques et orientés approximativement nord-sud.

OBS

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

Spanish

Save record 1

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: