Intra-seam Sedimentological Controls on Coal Quality: 2 Seam, Witbank Coalfield
Sub-seam mapping at an opencast colliery in the Witbank area, setting out a method geologists and resource estimators can apply to other seams.
by Mark Grodner | March 2003
Sub-seams within the No 2 Seam were characterised at a single test site using lithology, seam thickness, proximate analysis, petrography and geophysical logs, and a paleoenvironmental model was built from them. Wireline logs separated coal from interburden but could not resolve the individual zones, because the physical differences are too subtle. Better sedimentological models gave better reserve and resource estimates.
R1500,00
Description
Related Products
R1500,00
Wetlands Inventory of Upper Olifants River Catchment
2007
Catchment wide wetland inventory spanning parts of Mpumalanga and Gauteng, artificial wetlands included, with attributes on type, function and status for environmental planners.
What this report foundA digital wetland map and linked database were compiled for the Upper Olifants River Catchment from existing literature, existing wetland layers and aerial...
R1500,00
A digital wetland map and linked database were compiled for the Upper Olifants River Catchment from existing literature, existing wetland layers and aerial photography. Wetlands cover about 2 147 km2, some 14 per cent of the 15 158 km2 catchment. The wetland layer is about 70 per cent accurate and its attributes about 60 per cent, so it suits baseline screening rather than site assessment.
Petrochemical Characterization of Dolerites and Their Influence on Coal in the Witbank Highveld Coalfield, South Arica
2008
Masters study of dyke and sill intrusions at collieries in the Witbank and Highveld coalfields, using thin section petrography and X-ray fluorescence, for exploration geologists.
What this report foundDolerites in the study area differ in mineral content, geometry, thickness, grain size and degree of alteration.
R1500,00
Dolerites in the study area differ in mineral content, geometry, thickness, grain size and degree of alteration. Plagioclase textures indicate fractionation at different depths in the crust for the Witbank and Sasolburg intrusions, and the olivine content points to separate magma sources for two of the sills. Fine crystalline dolerite, including chilled margins and bifurcations, alters most readily.
Determination of the Impact of Coal Mine Water Irrigation on Groundwater Resources
2007
Groundwater investigation behind mine water irrigation in the Mpumalanga coalfields, with hydraulic testing, leaching studies and site selection and monitoring guidance for mines and regulators.
What this report foundMonitoring and geochemical modelling at five pilot sites, on undisturbed soils and on opencast spoils, showed that most soils held a large share of the applied...
R1500,00
Monitoring and geochemical modelling at five pilot sites, on undisturbed soils and on opencast spoils, showed that most soils held a large share of the applied salt in the upper unsaturated zone and that salinity built up slowly. Leachate volumes, leachate quality and aquifer mixing ratios were quantified. Irrigation is recommended on alternating pivots and for no longer than ten years in one area.