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IMPREGNATION ORE [2 records]

Record 1 2003-08-12

English

Subject field(s)
  • Metals Mining
  • Economic Geology
CONT

... the induced polarization phenomenon ... is extensively used in prospecting for impregnation ores ...

CONT

Increased production of disseminated "impregnation" ores and high-grade copper ores should compensate for declining production of high-nickel, massive sulfide ores.

French

Domaine(s)
  • Mines métalliques
  • Géologie économique

Spanish

Save record 1

Record 2 1999-04-14

English

Subject field(s)
  • Metals Mining
DEF

... a band of sulfide impregnation in metamorphic rocks. The sulfides are too abundant to be classed as accessory minerals, but too sparse to form an ore lens. Fahlbands have a characteristic rusty-brown appearance on weathering.

OBS

... term originally used by German miners ...

French

Domaine(s)
  • Mines métalliques
DEF

[...] roches métamorphiques très riches en minéraux sulfureux, qui prennent à l'air une teinte brunâtre.

CONT

[...] les fahlbandes résultent de la concentration de minerais en gîtes d'imprégnations diffuses à l'intérieur des filons hydrothermaux qui les traversent.

CONT

Il arrive [...] que des imprégnations pyriteuses demeurées trop diffuses pour être exploitables soient traversées par des réseaux de filons qui s'enrichissent en les recoupant. On donne le nom de fahlbandes à ces formations, intermédiaires entre les gîtes pyrométasomatiques et les gîtes hydrothermaux [...]

Spanish

Save record 2

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