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FORMATION FER RUBANEE [1 record]
Record 1 - internal organization data 2006-06-06
Record 1, English
Record 1, Subject field(s)
- Iron and Manganese Mining
- Petrography
Record 1, Main entry term, English
- banded iron formation
1, record 1, English, banded%20iron%20formation
correct
Record 1, Abbreviations, English
- bif 2, record 1, English, bif
correct
- BIF 3, record 1, English, BIF
correct
Record 1, Synonyms, English
- banded iron-formation 4, record 1, English, banded%20iron%2Dformation
correct
- bif 2, record 1, English, bif
correct
- BIF 5, record 1, English, BIF
correct
- bif 2, record 1, English, bif
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
Iron formation that shows marked banding, generally of iron-rich minerals and chert of fine-grained quartz. 2, record 1, English, - banded%20iron%20formation
Record number: 1, Textual support number: 1 CONT
Banded iron formations (BIF)... form one of the great mineral treasures. Besides the term BIF, these rocks are known in different continents under the terms itabarite, jaspillite, hematite-quartzite and specularite. They occur in stratigraphical units hundreds of metres thick and hundreds or even thousands of kilometres in lateral extent. ... Banded iron formation is characterized by its fine layering. The layers are generally 0.5-3 cm thick... The layering consists of silica layers ... alternating with layers of iron minerals. 6, record 1, English, - banded%20iron%20formation
Record number: 1, Textual support number: 2 CONT
... the oldest mineralization yet found [is] a banded iron formation with associated stratabound copper sulphides at Isua, West Greenland, dated at 3760 [plus or minus] 70 Ma ... 6, record 1, English, - banded%20iron%20formation
Record number: 1, Textual support number: 1 OBS
Banded iron formation. These rocks, of which the commonest facies is a rock consisting of alternating quartz- and hematite-rich layers, are virtually restricted to the Precambrian. 6, record 1, English, - banded%20iron%20formation
Record number: 1, Textual support number: 2 OBS
Precambrian BIF can be divided into two principal types ...: ... Algoma type BIF [and] ... Superior BIF ... 6, record 1, English, - banded%20iron%20formation
Record 1, French
Record 1, Domaine(s)
- Mines de fer et de manganèse
- Pétrographie
Record 1, Main entry term, French
- formation de fer rubanée
1, record 1, French, formation%20de%20fer%20ruban%C3%A9e
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- formation de fer rubané 2, record 1, French, formation%20de%20fer%20ruban%C3%A9
correct, feminine noun
- formation ferrifère rubanée 3, record 1, French, formation%20ferrif%C3%A8re%20ruban%C3%A9e
correct, feminine noun
- formation des minerais de fer rubanés 4, record 1, French, formation%20des%20minerais%20de%20fer%20ruban%C3%A9s
correct, feminine noun, less frequent
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Il s'est formé au Précambrien, il y a environ 2,5 milliards d'années, d'importants dépôts sédimentaires, très riches en oxyde de fer, principalement en hématite : ce sont les «formations de fer rubanées» de nos jours principales réserves mondiales de fer. 5, record 1, French, - formation%20de%20fer%20ruban%C3%A9e
Record number: 1, Textual support number: 2 CONT
[...] ces formations de fer rubané, c'est-à-dire en couches, résultent d'une sédimentation chimique : de l'oxyde ferrique a précipité quand de l'eau de mer froide, pauvre en oxygène et chargée en fer ferreux, est entrée en contact avec des eaux de surface très oxygénées. 6, record 1, French, - formation%20de%20fer%20ruban%C3%A9e
Record number: 1, Textual support number: 3 CONT
Gisements associés à des séries volcano-sédimentaires. [...] Ils représentent actuellement les concentrations ferrifères dont la cote économique est la plus élevée. Ces gisements sont désignés par les termes de : jaspilites, quartzites ferrugineux, "banded iron formation" (BIF), ou formations ferrifères rubanées. Ils sont tous stratiformes. 3, record 1, French, - formation%20de%20fer%20ruban%C3%A9e
Record number: 1, Textual support number: 4 CONT
Tout d'abord, l'oxygène reste prisonnier de l'hydrosphère et oxyde tous les éléments réducteurs qu'elle contient, fer et soufre notamment. C'est la période de formation des minerais de fer rubanés (entre 3 700 et 1700 Ma), alternance de couches de silice et d'oxyde de fer aujourd'hui exploités par exemple en Mauritanie, et qui renferment les premiers organismes connus. 4, record 1, French, - formation%20de%20fer%20ruban%C3%A9e
Record number: 1, Textual support number: 5 CONT
Les roches sédimentaires les plus anciennes connues appartiennent à la formation de fer rubané d'Isua au [...] Groenland, datée de 3 800 Ma. 4, record 1, French, - formation%20de%20fer%20ruban%C3%A9e
Record 1, Spanish
Record 1, Textual support, Spanish
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