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HEMATITE BLEUE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2006-05-18

English

Subject field(s)
  • Morphology and General Physiology
  • Mineralogy
DEF

Resembling a worm in form ...

CONT

Much of the blue hematite, martite, and goethite form vermicular to irregular microscopic intergrowths ...

French

Domaine(s)
  • Morphologie et physiologie générale
  • Minéralogie
DEF

Qui a quelque ressemblance de forme avec les vers.

CONT

L'hématite bleue, la martite et la goethite forment en grande partie des enchevêtrements microscopiques vermiculaires à irréguliers [...]

Spanish

Campo(s) temático(s)
  • Morfología y fisiología general
  • Mineralogía
DEF

Alargado, con forma de gusano.

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Record 2 2006-02-02

English

Subject field(s)
  • Mineralogy

French

Domaine(s)
  • Minéralogie

Spanish

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Record 3 2006-02-01

English

Subject field(s)
  • Iron and Manganese Mining
CONT

Blue ore was derived from cherty oxide lithofacies of iron-formation and is composed of fine grained, blue to dark grey-black hematite with lesser amounts of red hematite, martite, and brown goethite. It has a distinctly porous granular texture and contains primary ovoid granules or oolites of iron oxide replaced by later hematite or goethite, or enlarged by overgrowths of iron oxide. Blue ore may be friable to crumbly or nodular, or hard coherent and lumpy where a high proportion of secondary iron oxide cements relict fragments.

Key term(s)
  • blue iron ore

French

Domaine(s)
  • Mines de fer et de manganèse
CONT

Le minerai de fer bleu est dérivé de lithofaciès oxydés et cherteux de la formation de fer; il est composé d’hématite à grain fin, de couleur bleue à gris foncé-noir, avec des quantités moindres d’hématite rouge, de martite et de goethite brune. Sa texture est distinctement grenue et poreuse et contient des granules ovoïdes primaires ou oolites d’oxydes de fer remplacés ultérieurement par de l'hématite ou de la goethite, ou agrandis par des accroissements secondaires d’oxydes de fer. Le minerai de fer bleu peut être soit friable à granulaire ou noduleux ou bien encore cohérent, dur et grumeleux lorsqu'une forte proportion d’oxydes de fer d’origine secondaire cimente les fragments reliques.

Spanish

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