TERMIUM Plus®

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

EPIGENETIC ORE [8 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 2005-06-06

English

Subject field(s)
  • Various Metal Ores
DEF

... a vein which crosses the bedding planes of strata.

CONT

... the majority of ore deposits occur in metamorphosed host rocks. Among these deposits the substantial proportion... have been involved in the metamorphic episode(s) and consequently their texture and mineralogy may be considerably modified, often to the advantage of mineral separation processes. In addition, parts of the orebody may be mobilized and epigenetic features, such as cross-cutting veins, may be imposed on a syngenetic deposit.

French

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

Si ces prolongements [apophyses émises par des laccolites] s'insinuent entre les lits des roches sédimentaires encaissantes, ce sont des filons-couches ou sills par opposition aux filons transverses qui recoupent obliquement les plans de stratification.

Spanish

Save record 2

Record 3 2005-02-17

English

Subject field(s)
  • Petrography
CONT

The ore... formed from epigenetic hydrothermal solutions in the metasomatic syenite(or "sponge rock" of Lang et al., 1962).

French

Domaine(s)
  • Pétrographie
CONT

Le minerai [...] s'est formé à partir de solutions hydrothermales épigénétiques dans la syénite métasomatique (la «roche éponge» de Lang et al., 1962).

Spanish

Save record 3

Record 4 2004-07-12

English

Subject field(s)
  • Geochemistry
  • Metals Mining
CONT

Genesis of Kupferschiefer-type deposits has been hotly debated even since their recognition. For perhaps 70 or more years views have been strongly polarized, supporting either a syngenetic or late hydrothermal epigenetic origin.

CONT

The ore mineral assemblage... and the gangue assemblage... support an epigenetic origin...

French

Domaine(s)
  • Géochimie
  • Mines métalliques
CONT

[...] gisement d'origine épigénétique.

CONT

L'association métallifère [...] de même que l'association minérale de la gangue [...] laissent supposer une origine épigénétique [...]

Spanish

Save record 4

Record 5 2004-05-17

English

Subject field(s)
  • Petrography
CONT

The ore mineral assemblage... and the gangue assemblage... support an epigenetic origin as a skarn related to small, barely unroofed Cretaceous plutons in the district.

French

Domaine(s)
  • Pétrographie
CONT

L'association métallifère [...] de même que l'association minérale de la gangue [...] laissent supposer une origine épigénétique sous forme de skarn associé à de petits plutons du Crétacé peu exposés présents dans le district.

Spanish

Save record 5

Record 6 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 6

Record 7 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 7

Record 8 1997-01-16

English

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

It is important from the economic as well as the academic viewpoint to be able to recognize when an ore has been metamorphosed. Strongly metamorphosed ores may develop many similar features to high temperature epigenetic ores for which they may be mistaken.

French

Domaine(s)
  • Mines métalliques
  • Géologie économique
OBS

Par analogie avec «minéralisation métamorphisée» : ROGIS,1963, vol. 1, p. 757.

Spanish

Save record 8

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