Geology, Geochemistry and Formation of Supergene Mineral Deposits in Deeply Weathered Terrain
Series: Mineral Resource Reviews;
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77 157 Ft (73 483 Ft + 5% VAT)
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77 157 Ft
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Product details:
- Edition number 2025
- Publisher Springer
- Date of Publication 13 May 2025
- Number of Volumes 1 pieces, Book
- ISBN 9783031757327
- Binding Hardback
- No. of pages420 pages
- Size 254x178 mm
- Language English
- Illustrations 20 Illustrations, black & white; 214 Illustrations, color 700
Categories
Short description:
This book provides a comprehensive overview of the major supergene mineral deposits formed in intensely weathered lateritic terrains. It discusses both contemporary and pre-existing supergene deposits, describing their geological, mineralogical and geochemical characteristics. Supergene processes of enrichment are those that occur under ambient near-surface conditions, compared to hypogene processes mostly at depth under higher temperatures and pressures. Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering. Descending meteoric waters oxidize the primary (hypogene) minerals and redistribute the chemical elements. Residual supergene enrichment occurs as a physical process when the predominant rock-forming minerals oxidize and dissolve, concentrating ore elements hosted in resistant stable minerals; absolute chemical enrichment occurs when the ore elements themselves are leached and migrate in groundwater and precipitate due changes in the pH, oxidation potential and chemical composition of water. These processes can enrich commercially important elements to produce orebodies formed entirely by supergene processes. These include Al (bauxite), Fe ore, Ni-Co laterites, kaolinite, REE (clay deposits), Nb and REE (on carbonatites), base metals (secondary sulfides and oxidate minerals including gossans), gold and surficial U (in calcretes).
MoreLong description:
This book provides a comprehensive overview of the major supergene mineral deposits formed in intensely weathered lateritic terrains. It discusses both contemporary and pre-existing supergene deposits, describing their geological, mineralogical and geochemical characteristics. Supergene processes of enrichment are those that occur under ambient near-surface conditions, compared to hypogene processes mostly at depth under higher temperatures and pressures. Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering. Descending meteoric waters oxidize the primary (hypogene) minerals and redistribute the chemical elements. Residual supergene enrichment occurs as a physical process when the predominant rock-forming minerals oxidize and dissolve, concentrating ore elements hosted in resistant stable minerals; absolute chemical enrichment occurs when the ore elements themselves are leached and migrate in groundwater and precipitate due changes in the pH, oxidation potential and chemical composition of water. These processes can enrich commercially important elements to produce orebodies formed entirely by supergene processes. These include Al (bauxite), Fe ore, Ni-Co laterites, kaolinite, REE (clay deposits), Nb and REE (on carbonatites), base metals (secondary sulfides and oxidate minerals including gossans), gold and surficial U (in calcretes).
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Table of Contents:
1 Introduction.- 2 Geochemistry of supergene processes.- 3 Geology of supergene deposits.- 4 Formation of supergene deposits.- 5 ulfide oxidation and gossan formation.- 6 Tropical weathering model (lateritic, ferrasol and podsol sub-types).- 7 Glaciation weathering model and profile denudation.- 8 Caliche weathering model.- 9 Groundwater mobilization and enrichment.- 10 Surface water physical erosion model.- 11 Immature digenesis model.
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