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GABBRO OLIVINE [7 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2013-04-29

English

Subject field(s)
  • Petrography
DEF

A plutonic rock composed of anorthite and olivine in approximately equal amounts.

French

Domaine(s)
  • Pétrographie
DEF

Variété de gabbro composé d’olivine et d’anorthite.

OBS

L’augite, l’apatite et les oxydes de fer opaques sont les minéraux accessoires.

Spanish

Save record 1

Record 2 2011-09-09

English

Subject field(s)
  • Petrography
DEF

A plutonic igneous rock composed essentially of calcic plagioclase, augite, hypersthene, and olivine.

OBS

Hyperite is an obsolete name for gabbro containing hypersthene and augite ...

OBS

An olivine-bearing norite.

French

Domaine(s)
  • Pétrographie
DEF

Gabbro mésocrate à hypersthène, augite et olivine Labrador [...], hypersthène(13 %), augite(13 %), olivine(8 %), biotite, orthose, quartz, apatite, minéraux opaques [...]

Spanish

Campo(s) temático(s)
  • Petrografía
Save record 2

Record 3 2008-08-25

English

Subject field(s)
  • Petrography
CONT

... the olivine gabbro has heterogeneous texture, and abundant cognate and hornfelsed metasedimentary xenoliths.

OBS

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

French

Domaine(s)
  • Pétrographie
CONT

[...] le gabbro à olivine a une texture hétérogène et contient une abondance d’enclaves syngénétiques et de xénolites de roches métasédimentaires transformées en cornéenne.

OBS

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

Spanish

Save record 3

Record 4 2005-03-23

English

Subject field(s)
  • Petrography
DEF

A gabbro that is composed chiefly of calcic plagioclase (e.g. labradorite) and olivine with little or no pyroxene.

CONT

The high-Al chromitites of the Camaguey district of Cuba are associated with troctolites.

OBS

Such rocks commonly are speckled like trout, hence the ... synonyms derived from Greek, German, and English.

OBS

forellenstein: German for troutstone ... alluding to speckled trout-skin appearance ...

French

Domaine(s)
  • Pétrographie
DEF

Variété de gabbro à pyroxène rare et olivine abondante, plus ou moins serpentinisée.

CONT

Les chromitites riches en Al du district de Camaguey, à Cuba, sont associées à des troctolites.

OBS

Lorsque l’olivine est serpentinisée, la roche est parsemée de petites taches noires. Elle a alors le faciès «truité».

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Variedad de gabro rico en olivino y en magnetita; estos minerales forman manchitas negruzcas y rojizas que evocan las de la piel de la trucha.

Save record 4

Record 5 2004-02-25

English

Subject field(s)
  • Petrography
DEF

An inclusion in an igneous rock to which it is genetically related.

CONT

Some authors have suggested that [chromitites in harzburgite tectonites] are outliers of the cumulate succession that were incorporated in the tectonite either by gravitational sinking of dense autoliths ... or by infolding of the lowermost cumulate layers ...

CONT

... the olivine gabbro has heterogeneous texture, and abundant cognate and hornfelsed metasedimentary xenoliths.

French

Domaine(s)
  • Pétrographie
CONT

Certains chercheurs ont suggéré [que les chromitites dans les harzburgites tectonisées] puissent constituer des fragments de la séquence à cumulats ayant été incorporés aux harzburgites [...] soit par enfoncement gravitaire d’autolithes denses [...] soit par involution des lits à cumulats présents à la base de la séquence stratifiée [...]

CONT

[...] le gabbro à olivine a une texture hétérogène et contient une abondance d’enclaves syngénétiques et de xénolites de roches métasédimentaires transformées en cornéenne.

Spanish

Save record 5

Record 6 2003-11-17

English

Subject field(s)
  • Petrography
DEF

A gabbro containing olivine.

French

Domaine(s)
  • Pétrographie
CONT

En admettant que le gabbro à olivine représente le terme primitif du milieu basique, non modifié dans sa composition chimique et minéralogique, son évolution se fait par pertes progressives en Ca, Mg, Ti et gains en Si, Na, K.

Spanish

Save record 6

Record 7 1978-04-19

English

Subject field(s)
  • Geology
OBS

The olivine is generally of intermediate composition, but a few iron-rich gabbros (ferrogabbros) have fayalite.

OBS

Rocks of the Gabbro Clan in which either the pyroxenes or the olivines or both are exceptionally rich in iron are classed as "ferrogabbros".

French

Domaine(s)
  • Géologie
OBS

Par "ferrogabbro" on entend des roches à aspect de gabbro, sans olivine, mais possédant des minéraux riches en fer.

Spanish

Save record 7

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