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GISEMENT RESIDUEL [1 record]
Record 1 - internal organization data 2015-04-13
Record 1, English
Record 1, Subject field(s)
- Metals Mining
- Mineralogy
- Geochemistry
Record 1, Main entry term, English
- residual deposit
1, record 1, English, residual%20deposit
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
... a mineral deposit formed by mechanical concentration, e.g. a placer, or by decomposition in the zone of weathering, e.g. kaolin from feldspar. 2, record 1, English, - residual%20deposit
Record number: 1, Textual support number: 1 CONT
By the removal of soluble material from the original substance the insoluble material remaining may form valuable residual deposits. From carbonates and silicates in the original rock may be converted into practically insoluble oxides, which form iron ores as rock weathers; silica may be leached from kaolin, leaving the insoluble hydrous aluminum oxide, bauxite, a most important aluminum ore. Such deposits are generally formed in warm moist climates and would not be found in areas which have been glaciated. 3, record 1, English, - residual%20deposit
Record number: 1, Textual support number: 2 CONT
Residual deposits ... are ... formed by the removal of non-ore material from protore. For example the leaching of silica and alkalis from a nepheline-syenite may leave behind a surface capping of hydrous aluminium oxides (bauxite). 4, record 1, English, - residual%20deposit
Record 1, French
Record 1, Domaine(s)
- Mines métalliques
- Minéralogie
- Géochimie
Record 1, Main entry term, French
- gisement résiduel
1, record 1, French, gisement%20r%C3%A9siduel
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- gîte résiduel 2, record 1, French, g%C3%AEte%20r%C3%A9siduel
correct, masculine noun
- dépôt résiduel 3, record 1, French, d%C3%A9p%C3%B4t%20r%C3%A9siduel
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Gîtes résiduels. - Sous l'action des eaux superficielles ou hydrothermales, la roche-mère est désagrégée et subit parfois des transformations chimiques susceptibles de fournir des substances utiles [...] Ce sont des gîtes d'éluvion que l'on peut opposer aux gîtes d'illuvion (zone de cimentation) où le lessivage des couches supérieures provoque la formation d'incrustations, de concrétions ou de cimentations dans les couches sous-jacentes : le fer de certaines latérites [...] et surtout l'aluminium dans les bauxites appartiennent à ce type de gisement. 4, record 1, French, - gisement%20r%C3%A9siduel
Record number: 1, Textual support number: 2 CONT
Gisements résiduels. L'altération réduit les roches en fragments de toutes dimensions et détermine [...] la ségrégation des divers minéraux [...] Le départ successif des matériaux solubles, causé par les eaux météoriques, entraîne un enrichissement naturel en certains minéraux; c'est ainsi que naît un gisement résiduel. 5, record 1, French, - gisement%20r%C3%A9siduel
Record 1, Spanish
Record 1, Textual support, Spanish
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