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HORNBLENDE GRANITE [3 records]

Record 1 2011-12-14

English

Subject field(s)
  • Geochemistry
  • Erosion and Weathering (Geol.)
  • Petrography
CONT

basic front : In granitization, an advancing zone enriched in calcium, magnesium, and iron, that is said to represent those elements in the rock being granitized that are in excess of those required to form granite. During granitization, these elements are believed to be displaced and moved through the rock ahead of the granitization front, to form a zone enriched in minerals such as hornblende and pyroxene.

Key term(s)
  • granitisation front

French

Domaine(s)
  • Géochimie
  • Érosion et corrosion (Géologie)
  • Pétrographie

Spanish

Save record 1

Record 2 2011-05-17

English

Subject field(s)
  • Petrography
DEF

A felsic plutonic rock, generally adamellite or granodiorite, containing an amphibole (often hornblende) as an essential dark-colored constituent ...

French

Domaine(s)
  • Pétrographie
DEF

Variété de granite.

CONT

Granite à amphibole : mica noir, amphibole hornblende (verte ou brune), feldspath et quartz.

Spanish

Save record 2

Record 3 2004-07-13

English

Subject field(s)
  • Petrography
DEF

A granite that contains biotite but no other ferromagnesian mineral or muscovite.

CONT

The commonest division of the granite family is perhaps "biotite-granite"..., characterized by containing a brown mica to the exclusion of muscovite, hornblende or augite.

OBS

The main mineralogical types are biotite granite ("normal") ... Granitite is an obsolete name for the normal, i.e. biotitic, granite.

French

Domaine(s)
  • Pétrographie
CONT

Les variétés de granites [...] Granite à biotite : mica noir (biotite), feldspaths (surtout orthose) et quartz qui ont cristallisé dans cet ordre.

Spanish

Save record 3

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