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FRAMBOIDAL PYRITE [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-04-15

English

Subject field(s)
  • Mineralogy
DEF

Said of a mineral which occurs in spheroidal clusters resembling raspberry seeds.

PHR

Framboidal pyrite.

French

Domaine(s)
  • Minéralogie
DEF

En forme de framboise.

PHR

Pyrite framboïdale.

Spanish

Save record 1

Record 2 2010-04-14

English

Subject field(s)
  • Mineralogy
DEF

Pertaining to the rounded, globular texture of mineral formed by colloidal precipitation.

CONT

Volcanic massive sulphide deposits.... The dominant original textures appear to be colloform banding of the sulphides with much development of framboidal pyrite, perhaps reflecting colloidal deposition.

CONT

In general, [Mississippi Valley-Type] deposits are renowned for the large size and crystallographic variety of their constituent minerals. Some districts, in contrast, are characterized by their extremely fine-grained ores as exemplified by the banded, colloform sphalerite containing skeletal galena crystals as at Pine Point and Polaris in Canada and the Silesia District in Poland.

OBS

colloform: term used at Natural Resources Canada - Earth Sciences Sector.

PHR

Colloform cassiterite, sulphide, texture.

French

Domaine(s)
  • Minéralogie
DEF

Qui présente un aspect colloïdal.

CONT

[...] lits colloformes ou botryoïdaux de très fins cristaux [...]

OBS

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

PHR

Minerai, pechblende colloforme.

PHR

Cassitérite, sulfure, texture colloforme.

Spanish

Save record 2

Record 3 1999-05-03

English

Subject field(s)
  • Mineralogy
DEF

A texture, often found in certain types of mineral deposits, where crystals have grown in a radiating and concentric manner which may reflect underlying geochemical controls. Lead-zinc deposits of sedimentary origin often show colloform banding of pyrite and sphalerite ...

CONT

... colloform banding ... is a very fine scale banding involving one or more sulphides very like the banding in agate. Some workers believe that it results from colloidal deposition and that the banding is analogous to the Liesegang rings formed in some gels. This banding is very susceptible to destruction by recrystallization and may be partially or wholly destroyed by diagenesis or low grade metamorphism, producing a granular ore.

CONT

Textures vary with the degree of recrystallization. The dominant original textures appear to be colloform banding of the sulphides with much development of framboidal pyrite, perhaps reflecting colloidal deposition. Commonly however, recrystallization, often due to some degree of metamorphism, has destroyed the colloform banding and produced a granular ore.

French

Domaine(s)
  • Minéralogie
OBS

Voir «rubanement» et «colloforme».

Spanish

Save record 3

Record 4 1996-10-08

English

Subject field(s)
  • Iron and Manganese Mining
  • Mineralogy
  • Economic Geology
CONT

The dominant original textures appear to be coliform banding of the sulphides with much development of framboidal pyrite, perhaps reflecting colloidal deposition.

French

Domaine(s)
  • Mines de fer et de manganèse
  • Minéralogie
  • Géologie économique
DEF

[...] pyrite en petites sphères [...] formées par un agrégat (en forme de framboise) de cristaux cubiques microscopiques.

CONT

La pyrite prend des formes différentes selon la température de formation supposée du minéral : pyrite framboïdale et cubes dans les gîtes de basse température et stratiformes, dodécaèdres dans les gîtes liés aux roches plutoniques.

Spanish

Save record 4

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