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HORNBLENDE GABBRO [2 records]

Record 1 2009-07-13

English

Subject field(s)
  • Petrography
DEF

In the IUGS [International Union of Geological Sciences] classification, a plutonic rock satisfying the definition of gabbro, in which pl/(pl+hbl+px) [plagioclase/(plagioclase+hornblende+pyroxene) ] is between 10 and 90, and px/(pl+hbl+px) [pyroxene/(plagioclase+hornblende+pyroxene) ] is less than 5.

OBS

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

French

Domaine(s)
  • Pétrographie
CONT

Il existe [...] des gabbros à hornblende, généralement à hornblende brune, cette dernière se présentant en grands cristaux.

OBS

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

Spanish

Save record 1

Record 2 2005-07-04

English

Subject field(s)
  • Petrography
DEF

An alkali gabbro primarily composed of plagioclase, hornblende, biotite, and titanaugite, with lesser amounts of alkali feldspar and nepheline.

OBS

Its name is derived from Essex County, Massachusetts, from where it was originally defined by Sears in 1891 ...

French

Domaine(s)
  • Pétrographie
DEF

[Gabbro à feldspathoïdes] type grenu, où le plagioclase a une basicité inférieure à 50% d'anorthite.

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Variedad de teralita cuya plagioclasa es poco básica.

Save record 2

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