TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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basic front: In granitization, an advancing zone enriched in calcium, magnesium, and iron, that is said to represent those elements in the rock being granitized that are in excess of those required to form granite. During granitization, these elements are believed to be displaced and moved through the rock ahead of the granitization front, to form a zone enriched in minerals such as hornblende and pyroxene.  2, fiche 1, Anglais, - front%20of%20granitization

Fiche 1,  Justifications,  Français

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

Record number: 2, Textual support number: 1 DEF

A zone enriched in basic constituents which are expelled from country rocks undergoing granitization.  3, fiche 2, Anglais, - basic%20front

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The introduced elements (mainly iron and magnesium but commonly including aluminum, calcium, potassium, hydrogen, titanium, phosphorus, and manganese) are those that are either incompatible with a granite composition or in excess of the appropriate amounts.  3, fiche 2, Anglais, - basic%20front

Record number: 2, Textual support number: 2 OBS

mafic front: The preferred term of some petrologists.  4, fiche 2, Anglais, - basic%20front

Fiche 2,  Justifications,  Français

Record number: 2, Textual support number: 1 DEF

Zone enrichie de constituants basiques (calcium, magnésium et fer), expulsés des roches pendant leur granitisation.  2, fiche 2, Français, - front%20basique

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[...] une roche granitique [...] peut se former par remplacement de roches très variées, mais elle [...] refoule en dehors du front de granitisation les éléments chimiques qu'elle n’ accepte pas. Ainsi prennent naissance : les concentrations mélanocrates(fronts basiques), les gîtes pyrométasomatiques, les concentrations d’étain [...]  3, fiche 2, Français, - front%20basique

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[...] le granite expulse les éléments du groupe de l’étain et les «concentre» autour de lui (idée identique à celle des «fronts basiques»).  3, fiche 2, Français, - front%20basique

Fiche 2,  Justifications,  Espagnol

Fiche 3,  Justifications,  Anglais

Record number: 3, Textual support number: 1 CONT

Highly metamorphosed Archean and Aphebian rocks have been recognized within Grenville Province because the Kenoran and Hudsonian folded belts are truncated by the Grenville Front and it is possible that rocks of the older orogenic belts may extend well into Grenville Province.  2, fiche 3, Anglais, - metamorphosed

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... near the frontier with Brazil, the mountains change from metamorphosed sandstone to granite.  3, fiche 3, Anglais, - metamorphosed

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The successions in which the BIF [banded iron formations] occur usually lie unconformably on highly metamorphosed basement rocks.  4, fiche 3, Anglais, - metamorphosed

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The structure of the rocks forming the shield areas are extremely complicated, consisting mainly of intensely folded, highly metamorphosed rocks. In some shield areas the association of granitic gneisses with metamorphosed basaltic lavas (greenstones) is characteristic.  5, fiche 3, Anglais, - metamorphosed

Fiche 3,  Justifications,  Français

Record number: 3, Textual support number: 1 CONT

[Le front de mobilisation] est donc discordant sur le plan zonéographique et, d’une manière plus générale, la granitisation vellave paraît être un événement relativement tardif, qui, limité à la catazone, a affecté des formations déjà métamorphisées.  2, fiche 3, Français, - m%C3%A9tamorphis%C3%A9

Record number: 3, Textual support number: 2 CONT

Les quartzites [...] peuvent [...] provenir de silex métamorphisés.  3, fiche 3, Français, - m%C3%A9tamorphis%C3%A9

Record number: 3, Textual support number: 3 CONT

Beaucoup de gisements de corindon des vieux socles seraient [...] des bauxites métamorphisées.  4, fiche 3, Français, - m%C3%A9tamorphis%C3%A9

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métamorphiser : Transformer par métamorphisme.  5, fiche 3, Français, - m%C3%A9tamorphis%C3%A9

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métamorphisme : Ensemble des phénomènes qui donnent lieu à l’altération des roches sédimentaires, à leur transformation en roches cristallophylliennes.  5, fiche 3, Français, - m%C3%A9tamorphis%C3%A9

Fiche 3,  Justifications,  Espagnol