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EPIGENIQUE [6 records]

Record 1 2011-07-19

English

Subject field(s)
  • Various Metal Ores
DEF

In ore petrology, applied to mineral deposits of later origin than the enclosing rocks ...

CONT

An epigenetic deposit ... is one believed to have come into being after the host rocks in which it occurs. A good igneous analogy is a dyke; an example among ore deposits is a vein.

OBS

As opposed to "syngenetic" which applies to mineral deposits formed contemporaneously with the enclosing rocks.

French

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

S’applique à des gîtes minéraux mis en place après la formation des roches encaissantes.

CONT

Il est toujours délicat de trancher entre les concrétions syngénétiques, contemporaines des sédiments dans lesquels on les rencontre, et les concrétions épigénétiques formées tardivement.

Spanish

Save record 1

Record 2 2005-04-12

English

Subject field(s)
  • Geology
DEF

... said of a secondary sedimentary structure formed after the deposition of the sediment.

French

Domaine(s)
  • Géologie
DEF

Résultant d’une épigénie.

Spanish

Save record 2

Record 3 2001-07-04

English

Subject field(s)
  • Metals Mining
  • Geochemistry
CONT

Epigenetic ores, developed in dilatant zones along faults, often show signs of dynamic effects (brecciation, plastic flowage, etc.) due to fault movements during and after mineralization.

CONT

Strongly metamorphosed ores may develop many similar features to high temperature epigenetic ores for which they may be mistaken.

OBS

See record "epigenetic."

French

Domaine(s)
  • Mines métalliques
  • Géochimie

Spanish

Save record 3

Record 4 1999-04-01

English

Subject field(s)
  • Geochemistry
  • Metals Mining
CONT

There is little doubt that the majority of deposits of [the strata-bound] class have been formed from epigenetic hydrothermal solutions.

French

Domaine(s)
  • Géochimie
  • Mines métalliques
OBS

Voir «solution épigénétique» et «solution hydrothermale».

Key term(s)
  • solution hydrothermale épigénique

Spanish

Save record 4

Record 5 1997-10-31

English

Subject field(s)
  • Metals Mining
  • Economic Geology
  • Geochemistry
DEF

... [an] ore (mineral) deposit of later origin than the enclosing rocks.

French

Domaine(s)
  • Mines métalliques
  • Géologie économique
  • Géochimie
DEF

Gîte minéral de formation secondaire à l’intérieur de la roche encaissante.

OBS

Voir fiche «gisement épigénétique».

Spanish

Save record 5

Record 6 1978-01-24

English

Subject field(s)
  • Chemical Engineering
  • Petrography
OBS

A term used in Florida for a residual "pebble phosphate" occurring in clayey, gravelly, or compacted beds below the surface of the ground.

French

Domaine(s)
  • Génie chimique
  • Pétrographie
OBS

L'altération et la phosphatisation épigénique d’un niveau calcaire a produit, dans la masse, des chapelets de blocs incohérents semblables à des éléments de conglomérat(land rock).

Spanish

Save record 6

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