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- W2741107956 abstract "The arkosic and subordinate quartz-arenitic Mn-Fe coated terrigenous clasts were discovered to occur in association with manganese nodules hosted by weathered Mn-Fe rich alluvial-fluvial sediments of the Tertiary period in Carletonville area. The weathered Mn-Fe rich alluvial-fluvial sediments form the modern soil profiles in the study area. The Scanning Electron Microscope and petrographic studies of the terrigenous clasts indicated elevated content of manganese oxide precipitated in pore spaces between the framework grains as well as forming surface coatings on hand specimen. These clasts are mined with manganese nodules in the study area. The manganese nodules were formed from in situ concentration of Mn-oxide due to surficial weathering of the underlying Mn-rich dolomites of the Malmani Subgroup and then concentrated as Mn-rich residues, encircling rock fragments in soil profile. In contrast, Mn-Fe coated terrigenous clasts and the alluvial-fluvial sediments were sourced from older geological basins. Therefore, the purpose of the study were to construct a possible source area of Mn-Fe coated clasts and Mn-rich alluvial-fluvial sediments which hosted Mn-nodules in the mine area and from the results deduce the overall source of manganese that is mined in the area. On the basis of framework compositional analysis, the sediments were found to have been sourced from metamorphic and granitic origins in a cratonic interior to recycle orogen and sedimentation occurred in low plain, temperate, humid to subhumid climate. The sediment sources resembled the properties of the Archean granites and gneisses of the Witwatersrand Supergroup and Rand Anticline ridge (quartzite formation) exposed far off along the northern part of the study area on a high topographic mountain." @default.
- W2741107956 created "2017-08-08" @default.
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- W2741107956 date "2015-01-01" @default.
- W2741107956 modified "2023-09-23" @default.
- W2741107956 title "Provenance, tectonic setting and diagenesis of the Mn-Fe coated terrigenous clastsfrom the modern soil profiles, North West Province of South Africa: a case study of theCarletonville area." @default.
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