TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PHOSPHATIC NODULE [1 record]

Record 1 2001-09-11

English

Subject field(s)
  • Petrography
  • Mineralogy
  • Geochemistry
DEF

A black, gray or brown rounded mass or pebble, ranging in diameter from a few millimeters to more than 30 cm, consisting of coprolites, corals, shells, bones, sand grains, mica flakes, or sponge spicules more or less enveloped in collophane (calcium phosphate).

OBS

[Phosphatic nodules] occur in marine strata ...

French

Domaine(s)
  • Pétrographie
  • Minéralogie
  • Géochimie
CONT

[...] la formation des sulfures [...] ne requiert certainement pas des conditions climatiques strictes. En effet ceux-ci se forment dans des milieux aussi différents que : les sidéroses des bassins houillers, les nodules phosphatés, les minerais de fer de Lorraine, les tourbières, etc.

OBS

Les roches phosphatées [...] peuvent constituer des gisements exploitables, dans lesquels la teneur en phosphate atteint parfois jusqu'à 40 % de la roche. Le minéral se concentre sous forme de granulations ou nodules dans une gangue calcaire, argileuse ou sableuse.

Spanish

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