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MICROGRAPHIC TEXTURE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2017-05-12

English

Subject field(s)
  • Petrography
  • Mineralogy
DEF

The texture of an igneous rock resulting from the intergrowth of quartz and feldspar crystals which presents on flat surfaces the appearance of Hebrew, cuneiform, runic, or hieroglyphic writing.

OBS

A small-scale graphic texture is more specifically called a micrographic or granophyric texture.

French

Domaine(s)
  • Pétrographie
  • Minéralogie
DEF

[...] texture évoquant une écriture cunéiforme et résultant de l'intercroissance de quartz et de feldspaths alcalins.

CONT

[Les] structures graphiques [...] sont extrêmement fréquentes dans les minerais. [...] Ces structures se forment quelquefois par exsolution, mais plus fréquemment par d'autres processus [dont] le remplacement orienté, par exemple pour certaines associations chalcocite-bornite [...]; le dépôt simultané au point eutectique, par exemple pour certaines associations chalcopyrite-bornite; cette dernière association pouvant aussi se former à partir d'un gel mélangé.

CONT

[...] une structure peut être observable à l'œil nu si les grains minéraux sont gros, par exemple une structure graphique.

Spanish

Save record 1

Record 2 2009-05-14

English

Subject field(s)
  • Vulcanology and Seismology
  • Geochemistry
CONT

[Spherulites] occur in the Porcupine Mountain porphyries. It is due to the rapid growth of quartz feldspar eutectic from centers of crystallization in a salic magma and is sometimes, perhaps always, a microscopic or submicroscopic radial intergrowth of quartz and feldspar aggregate in the micrographic texture.

OBS

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

French

Domaine(s)
  • Volcanologie et sismologie
  • Géochimie
OBS

salique : Terme mnémotechnique s'appliquant aux roches renfermant du quartz, des feldspaths et, de ce fait, riches en silice et alumine.

OBS

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

Spanish

Save record 2

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