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MICROGRANITE [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2016-01-28

English

Subject field(s)
  • Petrography
DEF

A medium-grained igneous rock characterized by the mineral assemblage and chemical composition of diorite.

OBS

Such terms as "microdiorite, ""microgranite, "and "microsyenite" are used by Hatch and Wells for rocks with grain diameters between 0. 5 and 0. 05 mm.

OBS

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

French

Domaine(s)
  • Pétrographie
DEF

Roche magmatique plutonique à structure microgrenue, souvent en filons ou en bordure des massifs dioritiques [...] composée essentiellement de plagioclase et de hornblende verte avec, parfois, un peu de biotite.

CONT

Microsyénites, microdiorites (le porphyre bleu de l'Esterel ou porphyre bleu des Romains ou estérellite est une microdiorite quartzifère) [...]

OBS

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

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Diorita de grano muy fino, que se ha formado a menor profundidad que la diorita propiamente dicha.

Save record 1

Record 2 2012-12-21

English

Subject field(s)
  • Petrography
DEF

A... variety of peralkaline microgranite containing aegirine.

French

Domaine(s)
  • Pétrographie
DEF

Microgranite alcalin hypovolcanique à aegyrine.

Spanish

Save record 2

Record 3 2008-06-16

English

Subject field(s)
  • Petrography
CONT

As microgranite is finer-grained than its host, it represents a lithological contrast and, therefore, may also represent a physical discontinuity, particularly at its contacts with the host rock. This lithological contrast, coupled with the grainsize contrast across contacts could be exploited by weathering processes, thereby weakening the rock mass and resulting in preferential erosion.

CONT

The marine origin of the sediments and the lithological contrast (and resultant clay soils) with the surrounding traprock would suggest a significant likelihood of salinity.

OBS

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

French

Domaine(s)
  • Pétrographie
CONT

Le contraste lithologique est net au Cap entre les métapélites sombres et les pegmatites blanches.

Spanish

Save record 3

Record 4 2004-05-05

English

Subject field(s)
  • Petrography
OBS

Such terms as "microdiorite", microgranite", and "microsyenite" are used by Hatchand Wells for rocks with grain diameters between 0. 5 and 0. 05 mm.

French

Domaine(s)
  • Pétrographie
DEF

Roche hypo-abyssique de même composition que la syénite, mais à texture porphyrique, microgrenue, quelquefois pegmatitique.

CONT

Microsyénites, microdiorites, microgabbros.

Spanish

Save record 4

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