TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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Oxide facies... is the most important facies. It can be divided into the hematite and magnetite subfacies according to which iron oxide is dominant. There is a complete gradation between the two subfacies.... Oxide facies BIF [banded iron formation] typically averages 30-35% Fe. These rocks are mineable provided they are amenable to beneficiation by magnetic or gravity separation of the iron minerals.  3, fiche 1, Anglais, - oxide%20facies

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Well segregated oxide facies containing 30% or more iron in discrete grains or grain clusters of hematite, magnetite and goethite uniformly distributed in a cherty or granular quartz matrix are most suitable for ore. Oxide facies are selected that are clearly segregated from silicate, carbonate or sulphide facies and other barren rock ...  4, fiche 1, Anglais, - oxide%20facies

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Manganese oxide facies.  2, fiche 1, Anglais, - oxide%20facies

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 CONT

Diagramme montrant les principaux types de formations ferrifères résultant d'une précipitation chimique; on donne aussi le faciès de sédimentation [...]. Faciès oxyde. Faciès silicate. Faciès carbonate. Faciès sulfure.  2, fiche 1, Français, - faci%C3%A8s%20oxyd%C3%A9

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[...] plusieurs relations faciologiques, incluant les faciès oxydés, carbonatés, silicatés et sulfurés généralement reconnus dans les formations de fer, sont maintenant documentées dans la grande partie des stratafers.  1, fiche 1, Français, - faci%C3%A8s%20oxyd%C3%A9

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Faciès oxydé manganésifère.  1, fiche 1, Français, - faci%C3%A8s%20oxyd%C3%A9

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

Chemically precipitated iron formation composed of thinly banded chert and iron minerals with associated volcanic rocks and graywackes.  7, fiche 2, Anglais, - Algoma%20iron%20formation

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Algoma type. This type is characteristic of the Archaean greenstone belts where it finds its most widespread development. It also occurs... in younger rocks including the Phanerozoic. It shows a greywacke-volcanic association suggesting a geosynclinal environment. The oxide, carbonate and sulphide facies are present, with iron silicates often appearing in the carbonate facies. Algoma-type BIF [banded iron formation] generally ranges from a few centimetres to a hundred or so metres in thickness...  1, fiche 2, Anglais, - Algoma%20iron%20formation

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Significant gold in non-stratiform type deposits is associated with sulphide-rich Algoma-type BIF that occurs in either sediment- or volcanic-dominated portions of greenstone belt terrains.  8, fiche 2, Anglais, - Algoma%20iron%20formation

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[This type of iron-formation] is found along volcanic arcs, chiefly Archean in age ...  7, fiche 2, Anglais, - Algoma%20iron%20formation

Fiche 2,  Justifications,  Français

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La formation ferrifère du type Algoma a été déposée avec des roches volcaniques et sédimentaires caractéristiques du milieu eugéosynclinal [...] Les formations du type Algoma ont une épaisseur allant de quelques pouces à plus de 100 pieds [...]  2, fiche 2, Français, - formation%20de%20fer%20de%20type%20Algoma

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Les formations ferrifères stratifiées du type Algoma s'étendent généralement dans les zones volcano-sédimentaires. Les parties les plus étendues et les plus riches de ces formations peuvent constituer des massifs de minerai.  2, fiche 2, Français, - formation%20de%20fer%20de%20type%20Algoma

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Presque toutes les zones de roches volcaniques et sédimentaires dans les provinces tectoniques du lac Supérieur et de Churchill contiennent quelques formations de fer du type «Algoma».  2, fiche 2, Français, - formation%20de%20fer%20de%20type%20Algoma

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

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Silicate facies. Iron silicate minerals are generally associated with magnetite, siderite and chert. These form layers alternating with each other. This mineralogy suggests that the silicate facies forms in an environment common to parts of the oxide and carbonate facies. However, of all the facies of BIF, the depositional environment for iron silicates is least understood.  2, fiche 3, Anglais, - silicate%20facies

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Iron oxide-rich facies with a minimum of associated carbonate or silicate facies are selected for ore.  3, fiche 3, Anglais, - silicate%20facies

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

Diagramme montrant les principaux types de formations ferrifères résultant d'une précipitation chimique; on donne aussi le faciès de sédimentation [...]. Faciès oxyde. Faciès silicate. Faciès carbonate. Faciès sulfure.  3, fiche 3, Français, - faci%C3%A8s%20silicat%C3%A9

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Dans le district d'Iron River (Michigan), la superposition des faciès minéralogiques rappelle celle de Lorraine [...]; en partant de la base se succèdent : le faciès sulfuré, le faciès carbonaté et un faciès silicaté.  4, fiche 3, Français, - faci%C3%A8s%20silicat%C3%A9

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Tant [en Nouvelle-Calédonie] qu'en Côte d'Ivoire les teneurs en NiO des faciès silicates varient de 1 à 2 % dans le faciès oxydé et peuvent dépasser 2 %.  5, fiche 3, Français, - faci%C3%A8s%20silicat%C3%A9

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Fiche 4,  Justifications,  Anglais

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An iron formation in which the principal iron-rich minerals are oxides, typically hematite or magnetite ...  5, fiche 4, Anglais, - oxide%2Dfacies%20iron%20formation

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Sulphides generally comprise less than 10% of the altered rocks, except in oxide facies iron formation, in which they may represent up to 75% of the metasomatised rock.  3, fiche 4, Anglais, - oxide%2Dfacies%20iron%20formation

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Oxide facies BIF typically averages 30-35% Fe. These rocks are mineable provided they are amenable to beneficiation by magnetic or gravity separation of the iron minerals.  4, fiche 4, Anglais, - oxide%2Dfacies%20iron%20formation

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[The oxide-facies iron formation] is thought to be the shoreward facies of iron formation.  5, fiche 4, Anglais, - oxide%2Dfacies%20iron%20formation

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Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

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An iron formation in which the principal iron minerals are silicates, such as greenalite, stilpnomelane, minnesotaite, and iron-rich chlorite ...  1, fiche 5, Anglais, - silicate%2Dfacies%20iron%20formation

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Banded iron formation is characterized by its fine layering.... The simplest and commonest BIF consists of alternating hematite and chert layers.... James(1954) identified four important facies of BIF.(a) Oxide facies....(b) Carbonate facies....(c) Silicate facies....(d) Sulphide facies.  2, fiche 5, Anglais, - silicate%2Dfacies%20iron%20formation

Fiche 5,  Justifications,  Français

Record number: 5, Textual support number: 1 OBS

Diagramme montrant les principaux types de formations ferrifères résultant d'une précipitation chimique; on donne aussi le faciès de sédimentation [...]. Faciès oxyde. Faciès silicate. Faciès carbonate. Faciès sulfure.  2, fiche 5, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20silicat%C3%A9

Record number: 5, Textual support number: 2 OBS

Voir aussi la fiche «faciès silicaté».  1, fiche 5, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20silicat%C3%A9

Fiche 5,  Justifications,  Espagnol

Fiche 6,  Justifications,  Anglais

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An iron formation consisting essentially of pyritic carbonaceous slate. It was formed in the deeper, reducing parts of seas or basins.  1, fiche 6, Anglais, - sulfide%2Dfacies%20iron%20formation

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The sulphide-rich BIF in the stratiform deposits may be considered a true sulphide facies BIF and was most probably deposited from hydrothermal fluids during chemical sedimentation.  3, fiche 6, Anglais, - sulfide%2Dfacies%20iron%20formation

Record number: 6, Textual support number: 1 OBS

Banded iron formation is characterized by its fine layering.... The simplest and commonest BIF consists of alternating hematite and chert layers.... James(1954) identified four important facies of BIF.(a) Oxide facies....(b) Carbonate facies....(c) Silicate facies....(d) Sulphide facies.  4, fiche 6, Anglais, - sulfide%2Dfacies%20iron%20formation

Fiche 6,  Justifications,  Français

Record number: 6, Textual support number: 1 OBS

Diagramme montrant les principaux types de formations ferrifères résultant d'une précipitation chimique; on donne aussi le faciès de sédimentation [...]. Faciès oxyde. Faciès silicate. Faciès carbonate. Faciès sulfure.  2, fiche 6, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20sulfure

Fiche 6,  Justifications,  Espagnol

Fiche 7,  Justifications,  Anglais

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An iron formation characterized by alternating laminae of chert and iron-rich carbonate minerals ...  1, fiche 7, Anglais, - carbonate%2Dfacies%20iron%20formation

Record number: 7, Textual support number: 1 OBS

Banded iron formation is characterized by its fine layering.... The simplest and commonest BIF consists of alternating hematite and chert layers.... James(1954) identified four important facies of BIF.(a) Oxide facies....(b) Carbonate facies....(c) Silicate facies....(d) Sulphide facies.  3, fiche 7, Anglais, - carbonate%2Dfacies%20iron%20formation

Fiche 7,  Justifications,  Français

Record number: 7, Textual support number: 1 OBS

Diagramme montrant les principaux types de formations ferrifères résultant d'une précipitation chimique; on donne aussi le faciès de sédimentation [...]. Faciès oxyde. Faciès silicate. Faciès carbonate. Faciès sulfure.  3, fiche 7, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20carbonat%C3%A9

Record number: 7, Textual support number: 1 CONT

Les B.I.F. oxydés et carbonatés sont fréquents.  2, fiche 7, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20carbonat%C3%A9

Record number: 7, Textual support number: 2 OBS

Voir fiches «formation ferrifère rubanée» et «faciès carbonaté».  1, fiche 7, Français, - formation%20ferrif%C3%A8re%20%C3%A0%20faci%C3%A8s%20carbonat%C3%A9

Fiche 7,  Justifications,  Espagnol

Fiche 8,  Justifications,  Anglais

Record number: 8, Textual support number: 1 CONT

Oxide facies are selected that are clearly segregated from silicate, carbonate or sulphide facies and other barren rock, and that are amenable to beneficiation to meet required chemical and physical specifications.  2, fiche 8, Anglais, - amenable%20to%20beneficiation

Record number: 8, Textual support number: 2 CONT

Oxide facies BIF typically averages 30-35% Fe. These rocks are mineable provided they are amenable to beneficiation by magnetic or gravity separation of the iron minerals.  3, fiche 8, Anglais, - amenable%20to%20beneficiation

Fiche 8,  Justifications,  Français

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stérile : Roche ou terrain dont les concentrations éventuelles en substance utile sont jugées non valorisables.  2, fiche 8, Français, - valorisable

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[...] teneur en métaux valorisables.  3, fiche 8, Français, - valorisable

Fiche 8,  Justifications,  Espagnol