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Évaluation des filons de quartz pegmatitiques dans la région d'Akpet
Paperback
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ISBN10: 6209946550
ISBN13: 9786209946554
Publisher: Editions Notre Savoir
Published: May 14 2026
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786209946554
Publisher: Editions Notre Savoir
Published: May 14 2026
Pages: 76
Weight: 0.25
Height: 0.18 Width: 6.00 Depth: 9.00
Language: French
Cet ouvrage présente une évaluation géologique et géochimique comparative des veines de pegmatite-quartz encaissées dans des granites dans les régions d'Akpet et de Betem, dans le sud-est du Nigeria, afin d'évaluer leur potentiel en tant que sources de quartz de haute pureté (HPQ). Des analyses minéralogiques, géochimiques et statistiques ont été utilisées pour déterminer la genèse, les niveaux d'impureté et la viabilité économique du quartz dans la région, révélant des environnements génétiques distincts pour les sites: Les veines de quartz d'Akpet sont associées à des processus orogéniques, formés dans des conditions de haute pression et de température modérée pendant l'orogenèse panafricaine, tandis que le quartz de Betem est lié à des systèmes épithermaux, formés à des pressions et des températures plus basses dans un environnement magmatique-hydrothermal peu profond. La géochimie des oligo-éléments indique des concentrations nettement plus faibles d'impuretés telles que Al, Ti, Li et Fe dans le quartz d'Akpet que dans celui de Betem. Ces éléments sont essentiels pour déterminer si le quartz convient aux industries de haute technologie. Ce livre aidera les débutants en géochimie et en exploration minérale à s'orienter dans cette discipline complexe mais intéressante.
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