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Showing 1 to 20 of 57 for “"Bushveld"”.
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P-T estimates of peak Bushveld metamorphism in the eastern Bushveld complex, Limpopo Province, South Africa : constraints from P-T pseudosections
The Bushveld Igneous Complex (BIC) is the largest layered mafic intrusion in the world and contains the largest known deposits of vanadium, chromium and Platinum group elements on the planet, as well as large deposits of iron, nickel, copper, tin and fluorite. To aid and improve our understanding …
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The 'Ins' and 'Outs' of the Bushveld Complex Upper Zone
… geodynamic evolution of the Upper Zone of the Bushveld Complex. The Bushveld Complex is one of the few large layered intrusions in which the entire cumulate stratigraphy is preserved and well-exposed from its base to its roof. Despite this unique feature, relatively little is known about the …
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Dancing the Tiekiedraai : a socio-historic approach to Bosman's bushveld narratives
The name 'Herman Charles Bosman' is a familiar one to South Africans, and his narratives have been celebrated widely for their skilful construction, their humour and the unique way in which they capture a segment of South African rural life. While Bosman is regarded as a significant figure in South …
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An isotope study of the felsic units of the Bushveld Large Igneous Province, South Africa
… isotope study was carried out on the ~ 2059 Ma Bushveld granites and granophyres. A small number of Rooiberg Group felsites were also studied.
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Distribution and causes of high fluoride groundwater in the western Bushveld area of South Africa
Dental fluorosis is endemic in the western Bushveld of South Africa. This study investigated the occurrence of fluoride (Fˉ) in groundwater in the area. It was hypothesised that fluoride in groundwater originated from the dissolution of fluorine-bearing minerals, principally fluorite, mica, …
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Geochemical characteristics and rare earth element trends of the Upper Zone in the western Bushveld Complex
… crystallization of the Upper Zone in the western Bushveld. The geochemical characteristics of the western Bushveld Upper Zone are also briefly compared to the Upper Zone of the eastern Bushveld as exposed in the Roossenekal district. The rock types intersected by the Bierkraal 1 borehole consist …
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The Use of Veld Restoration Techniques for Rehabilitating Degraded Waterberg Mountain Bushveld in Lapalala Wilderness Reserve, Limpopo Province
The natural rangelands of southern Africa have undergone significant degradation due to human and climatic activities. Fortunately, rehabilitation measures have been extensively researched and are available to address this issue. A variety of techniques exist to remedy the damage done to our …
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Development of the Platreef in the northern limb of the Bushveld Complex at Sandsloot, Mokopane District, South Africa
… Layered Suite in the northern limb of the Bushveld Complex. The reef lies unconformably on a footwall (floor) sequence of Transvaal Supergroup sedimentary rocks and Archaean granite/gneiss basement, and is overlain by a hangingwall (roof) of Main Zone gabbronorites. Structural relationships …
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An investigation into the formation of the lower Main Zone in the eastern limb of the Bushveld complex, South Africa
The Main Zone is dominated by medium – grained, homogeneous gabbronorite, and anorthosites. The plagioclase compositions of the core is ((Na(0.227 – 0.353), K (0.012 – 0.046), Ca (0.651 – 0.777)) Al (1.630 – 1.752) Si (2.183 – 2.345) O8) and at the rim is ((Na (0.189 – 0.371), K (0.005 – 0.108), Ca …
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A multi-isotopic geochemical investigation of the Lower Zone, Bushveld Complex, South Africa: implications for a crustal component for parental magmas
… current study focuses on the Lower Zone of the Bushveld Complex, South Africa using multiple geochemical and isotopic systems to determine the origin of crustal signatures, i.e. crustal assimilation or recycled crust in the mantle source, present throughout the Rustenburg Layered Suite (RLS) …
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Some aspects of the geochemistry of platinum, palladium, and gold in igneous rocks with special reference to the Bushveld Complex, Transvaal
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology and Geophysics, 1954.
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A petrographical and mineralogical investigation of the rocks of the Bushveld Igneous Complex in the Tauteshoogte-Roossenekal area of the Eastern Transvaal
… occupied by rocks of the epicrustal phase of the Bushveld Complex, and consists largely of Rooiberg Felsite and granophyre as well as leptite, microgranite and granodiorite. Numerous veins of finegrained granite traverse the leptite which is considered to be highly metamorphosed felsite. These …
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Stratigraphic and structural interpretation of seismic reflection data across selected sections of the Kaapvaal Craton
… Craton's western margin, the northern margin or Bushveld lines (flanking the Thabazimbi-Murchison Lineament and across the western extremity of the Bushveld Igneous Complex) and the Kaapvaal Craton interior. The seismic data was interpreted using Charisma seismic interpretation software, Geoframe …
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The Application of Machine Learning Methods to Portable X-Ray Fluorescence Data: A Case Study from Zwartfontein Farm, Northern Limb of the Bushveld Complex, South Africa
… as a case study, on the Northern Limb of the Bushveld Complex of South Africa – a complex multi-commodity deposit (Ni-Cu-(Co)-PGE) comprising intricately layered mafic-ultramafic cumulate rocks overprinted by variable alteration minerals. Although pXRF provides rapid multi-elemental analysis, …
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The discovery of baddeleyite (ZrO2) and chrome spinel in the basal Rooiberg Group of the 2.057 Ga Bushveld Complex, South Africa: Implications for the impact and igneous scenarios for the petrogenesis of the Rooiberg Group.
… thick siliceous Rooiberg Group of the 2.057 Ga Bushveld Complex, South Africa. The discovery of composite zircon-baddeleyite grains and chromite in the Basal Rhyolite demands a reassessment of proposed scenarios for its petrogenesis. These scenarios include: 1) crustal melting caused by, and …
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Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
… well constrained situations. The age of the Bushveld Complex has been measured using various radioisotope chronometers which yield ages ranging from 1921 – 2165 Ma, although an age of 2054 Ma is widely accepted. We present an accurate isochron age of 2012 ± 47 Ma (2σ, n = 50, MSWD = 1.19) for …
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Investigating depressant behaviour in the flotation of selected Merensky ores
… the southern section of the Merensky reef in the Bushveld Igneous Complex.
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Developing a framework for the design of the milling and rougher circuits for a platinum-bearing UG2 ore
In the western limb of the Bushveld Igneous Complex, platinum is mined predominantly from two reefs – Merensky and UG2. Most of the platinum group minerals (PGM’s) in Merensky ore are associated with base metal sulphides (BMS), and thus Merensky concentrators will usually resemble simple BMS …
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Investigation of the surface properties of gangue minerals in PGM bearing ores
… associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc. Although talc is present in small quantities it has a disproportionate effect on concentrate grade by enhancing froth stability and …
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