TERMIUM Plus®

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POIKILOBLASTIC [3 records]

Record 1 2013-04-29

English

Subject field(s)
  • Petrography
DEF

A hornfels with large poikiloblastic crystals of olivine.

French

Domaine(s)
  • Pétrographie

Spanish

Save record 1

Record 2 2005-05-27

English

Subject field(s)
  • Various Metal Ores
CONT

... the disseminated sulphides are not normally homogeneously dispersed throughout the sandstone. Two very common textures are : i) poikiloblastic "spots" as much as 2 cm diameter, representing local accumulations of galena; spots may be randomly distributed in the sandstone or may show a slight preferential alignment parallel to bedding; ii) discontinuous galena-rich streaks distributed parallel to bedding, including crossbedding.

French

Domaine(s)
  • Minerais divers (Mines métalliques)
CONT

[...] ces sulfures ne sont normalement pas disséminés dans les grès de manière homogène. Deux textures sont très courantes. On observe d'abord i) des «taches» poeciloblastiques pouvant atteindre 2 cm de diamètre qui correspondent à des accumulations locales de galène. Ces taches peuvent être réparties dans le grès de manière à peu près aléatoire, ou bien elles peuvent manifester une lègère tendance à s'aligner parallèlement à la stratification. On observe également ii) des bandes discontinues riches en galène réparties parallèlement à la stratification, y compris la stratification oblique.

Spanish

Save record 2

Record 3 1999-09-16

English

Subject field(s)
  • Mineralogy
  • Petrography
DEF

Said of a metamorphic texture due to the development, during recrystallization, of a new mineral around numerous relicts of the original minerals, thus simulating the poikilitic texture of igneous rocks.

French

Domaine(s)
  • Minéralogie
  • Pétrographie
DEF

Se dit des roches métamorphiques poecilitiques.

CONT

Les structures «diablastiques» [...] et «poeciloblastiques» (inclusions poecilitiques des particules de la trame dans de grands cristaux) peuvent s'expliquer [...] par adaptation à minimiser les tensions internes [...]

Spanish

Save record 3

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