TERMIUM Plus®

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

WEHRLITE [3 records]

Record 1 2017-02-28

English

Subject field(s)
  • Petrography
DEF

... an ultramafic and ultrabasic rock that is a mixture of olivine and clinopyroxene.

OBS

[Wehrlite] is a subdivision of the peridotites.

French

Domaine(s)
  • Pétrographie
OBS

Variété de péridotite à clinopyroxène (diopside ou diallage).

Spanish

Campo(s) temático(s)
  • Petrografía
OBS

Peridotita cuyo mineral principal es la augita.

Save record 1

Record 2 2011-12-12

English

Subject field(s)
  • Petrography
  • Geochemistry
CONT

Typical ophiolite sequences are comprised of a thin layer of deep-sea sediments, overlying a sequence of basaltic pillow lavas, sheeted dike complexes, foliated to layered gabbro, and finally an ultramafic complex, which can have an exposed thickness of up to 7 km. This ultramafic section of ophiolite sequences can vary in composition; however, it is most commonly dominated by varieties of peridotite typically associated with the mantle such as harzburgite(olivine and orthopyroxene rich), and lherzolite(olivine, ortho-and clinopyroxene rich), with secondary wehrlite(clinopyroxene and olivine rich) and dunite(olivine rich)...

OBS

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

Key term(s)
  • ultra-mafic complex
  • ultra mafic complex

French

Domaine(s)
  • Pétrographie
  • Géochimie
CONT

Les participants à la conférence de Penrose en 1972 [...] ont défini le terme «ophiolite» comme étant un assemblage distinctif de roches mafiques à ultramafiques qui comprend, de haut en bas 1) un complexe ultramafique consistant en proportion variable d'harzburgite, de lherzolite et de dunite ayant habituellement une fabrique tectonique, 2) un complexe gabbroïque à texture de cumulats [...], 3) un complexe de dykes, 4) un complexe de roches volcaniques généralement en coussin.

OBS

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

Spanish

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Record 3 2006-11-15

English

Subject field(s)
  • Petrography
  • Geochemistry
DEF

An ultramafic plutonic rock consisting essentially of clinopyroxene and up to 50 percent olivine.

CONT

The Turnagain ultramafic complex is an Alaskan-type complex of possible Late Triassic age. It has a central zone of dunite and an outer zone of wehrlite, olivine clinopyroxenite, clinopyroxenite, dunite, hornblendite(rare), and basic hornblende and plagioclase-bearing rock(rare).... Olivine is most magnesian... in the central dunite, and most iron-rich... in olivine clinopyroxenite.

OBS

All of the clinopyroxenites may be olivine- and phlogopite-bearing with olivine surrounding pyroxenes. In some variants, termed olivine-clinopyroxenites, olivine is a major component (20-35 volume %) with only minor phlogopite (up to 2.5% ...). Rocks with higher amounts of phlogopite (12-31 volume %) and less than 8 volume % olivine are termed phlogopite-clinopyroxenites ...

OBS

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

French

Domaine(s)
  • Pétrographie
  • Géochimie
CONT

Le complexe ultramafique Turnagain est un complexe de type «alaskan» d'âge triassique supérieur possible. Il est formé d'une zone centrale de dunite et d'une zone extérieure de wehrlite, clinopyroxénite à olivine, clinopyroxénite, dunite, hornblendite (rare), et d'une roche basique à plagioclase et hornblende (rare). [...] L'olivine la plus magnésienne [...] se trouve dans la zone centrale et celle la plus riche en fer [...] dans la clinopyroxénite à olivine.

OBS

clinopyroxénite : Roche magmatique composée de clinopyroxène.

OBS

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

Spanish

Save record 3

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