TERMIUM Plus®

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PLEOCHROIC HALOES [1 record]

Record 1 2008-09-09

English

Subject field(s)
  • Erosion and Weathering (Geol.)
  • Radioactive Ores (Mining)
  • Geochemistry
DEF

Minute, concentric-spherical zones of darkening or coloring that form around inclusions of radioactive minerals in biotite, chlorite, and a few other minerals.

OBS

Plural: pleochroic haloes; radiation(-)damage haloes.

OBS

radiation-damage halo: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • pleochroic haloes
  • radiation damage haloes

French

Domaine(s)
  • Érosion et corrosion (Géologie)
  • Minerais radioactifs (Mines métalliques)
  • Géochimie
CONT

Des auréoles pléochroïques dans la biotite indiquent la présence de minéraux radioactifs tels que la monazite et le zircon, lesquels sont à l'origine des concentrations élevées en thorium.

OBS

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

Spanish

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