A5076856846- Geological and Geochemical Analysis
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Radioactive element chemistry and processing
- Extraction and Separation Processes
- Geotechnical and Geomechanical Engineering
University of Johannesburg
2018-2024
The manganese ore of the Hotazel Formation in Kalahari Manganese Field, which has been thrust along Blackridge fault, subjected to various degrees pre-thrusting hydrothermal and post-thrusting supergene alteration. Coarse-grained apatite, appears be formed under conditions on textural grounds, is present thrusted previously unrecorded abundances. U-Pb dating this apatite within placed onset chemical weathering succession at a 77 ± 7.5 Ma, approximately 35 million years earlier than thought...
Abstract The thrusted manganese ore above the Blackridge Thrust Fault is a predominantly unstudied ore‐type and as such, there an urgent need to petrographically characterize it. A total of 80 samples were collected from lower bed six boreholes on Mukulu in north Kalahari Manganese Field. Each sample underwent range optical electron petrographic analyses order effectively three dominant stages alteration, namely Stages 1, 2 3. Similar hydrothermally‐altered Wessels‐type ore, braunite II...
Abstract A diabase sill intersected in drill core GHEX-59 from the Avontuur deposit of Kalahari Manganese Field South Africa displays an 8 m thick paleosaprolitic weathering profile developed below regional unconformity at base ~2.0 Ga red-bed succession Gamagara Formation Elim Group (Keis Supergroup). Tracking element mobility weathered relative to unaltered parent material assists reconstruction surface conditions and nature pore waters associated with Paleoproterozoic. The upper part...
Abstract The world-class deposits of the Kalahari Manganese Field (KMF) in South Africa constitute a key resource manganese (Mn) ore for global steel industry. Many aspects origin high metal-grade ores northernmost KMF remain unresolved, especially with respect to complex hydrothermal history these and source/s fluids responsible epigenetic metal enrichment. In this study, geochemistry boron (B) is employed as potential proxy such processes, results are contextualised against an assumed low...
Abstract The Paleoproterozoic Kalahari Manganese Field is the largest known land-based manganese (Mn) deposit on Earth and comprises five erosional relics of iron- manganese-rich Hotazel Formation. A total 19 ore samples from lower horizon Formation were selected for analysis based their relative metasomatic alteration states. These range primary diagenetic, classic supergene enriched, hydrothermally enriched (Wessels-type ore) thrusted ore. When normalised to Post-Archaean Australian shale...