Trace and REE geochemistry of bauxite deposit of Darai–Daldali plateau, Kabirdham district, Chhattisgarh, India

The Darai–Daldali plateau preserves well developed laterite type bauxite deposits as a result of in-situ weathering of basaltic rocks (Deccan Traps). The bauxite ore is essentially composed of gibbsite and boehmite in subordinate amount, along with anatase and brookite as accessory minerals. Kaolini...

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Bibliographic Details
Published in:Journal of Earth System Science 2020-12, Vol.129 (1), p.117, Article 117
Main Authors: Das, Bhumika, Khan, M W Y, Dhruw, Harish
Format: Article
Language:English
Subjects:
Aluminum oxide
Anatase
Basalt
Bauxite
Bayer process
Boehmite
Brookite
Earth and Environmental Science
Earth Sciences
Ferric oxide
Geochemistry
Geology
Gibbsite
Goethite
Groundwater table
Haematite
Hematite
Ilmenite
Investigations
Kaolinite
Laterites
Mineralogy
Oxidation
Pore water
Silica
Silicon dioxide
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Trace elements
Water table
Weathering
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Summary:The Darai–Daldali plateau preserves well developed laterite type bauxite deposits as a result of in-situ weathering of basaltic rocks (Deccan Traps). The bauxite ore is essentially composed of gibbsite and boehmite in subordinate amount, along with anatase and brookite as accessory minerals. Kaolinite, goethite, hematite, ilmenite, gibbsite and brookite are found in lateritic bauxite and laterite samples in variable amounts. SiO 2 –Al 2 O 3 –Fe 2 O 3 diagram illustrates strong bauxitization resulting from desilication in the early stage. The disilication was followed by bauxitization and deferruginization at late stages as a result of reducing and oxidizing conditions, respectively, due to fluctuating water table, which is evidently supported by A–L–F plot. Progressive loss/gain in FMTE, LILE, HFSE and REE during bauxitization process of basalt through lateritic bauxite facies is observed. La/Y varying from 1.17 to 4.11 suggests prevalence of alkaline conditions. Positive Eu/Eu* anomaly in these samples is suggestive of colloidal precipitation of gibbsite from pore water of lateritic residuum. Mass increase of Ce in laterite samples further supports to its sorption on goethite and hematite mineral phases.
ISSN:2347-4327
0253-4126
0973-774X
DOI:10.1007/s12040-020-1377-1