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The Merensky Reef is a layer of igneous rock in the Bushveld Igneous Complex BIC in the North West Limpopo Gauteng and Mpumalanga provinces of South Africa which together with an underlying layer the Upper Group 2 Reef UG2 contains most of the world s known reserves of platinum group metals PGMs or platinum group elements PGEs —platinum palladium rhodium ruthenium iridium and
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MISC{Cawthorn ofmagnetite author = {R Grant Cawthorn and T S Mccarthy and G Davies} title = {of magnetite from the Bushveld Complex South Africa} year = {}} Share OpenURL Abstract are found in pure magnetitite layers in the upper zone of the Bushveld Complex Detailed electron microprobe analysis of one of these indicates avertical compositional zoning of Cr a highly compatible
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The Bushveld Complex a layered mafic intrusion in South Africa shows extreme vertical differentiation in terms of mineral compositions and modal proportions from dunite to ferrodiorite
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Chromitite Layer of the Bushveld Complex Economic Geology 80 p 944 957 Hulbert and Von Gruenewaldt G 1985 Textural and Compositional Features of Chromite in the Lower and Critical Zones of the Bushveld Complex South of Potgietersrus Economic Geology 80 p 872 895 Roeder and Campbell 1985 The effect of postcumulus
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R Grant Cawthorn Journals 2024 11 1 Bushveld Complex R Grant Cawthorn Recent exploration in the Transvaal indicates possible new pia tin urn deposits but they are not likely to be payable jor some time South Africa and Bophuthatswana produce well over 50070 of the world s platinum and hold an even greater proportion of the world s known
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Cawthorn Tegner C 2024 Modeling incompatible trace element abundances in plagioclase in the Skaergaard intrusion using the trapped liquid shift effect Contributions to Mineralogy and Petrology 172 11 12 93
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40 Employees and Contractors Including 4 s 1 5 s 14 Hons 9 Competent Persons 15 Fellows or Members of Professional Societies Committed to continuous professional development and mentorship Dedicated to walk the extra mile and produce high quality technical deliverables on brief on budget and on time
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Continental mantle signature of Bushveld magmas and coeval diamonds Nature 2024 Steven Shirey S Richardson Download Download PDF Full PDF Package Download Full PDF Package This Paper A short summary of this paper 37 Full PDFs related to this paper Read Paper Download Download PDF Download Full PDF Package Translate PDF Related Papers Re Os isotopic composition of peridotitic
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In the Paleoproterozoic Bushveld Complex the world s largest layered intrusion the trace element systematics of zircon provide temperature composition constraints on the near solidus crystallization of mafic ultramafic cumulates and overlying granitic rocks Zircon occurs with other late stage interstitial minerals quartz biotite Na plagioclase and crystallized at temperatures
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The Rustenburg Layered Suite of the Bushveld Complex of South Africa is a vast layered accumulation of mafic and ultramafic rocks It has long been regarded as a textbook result of fractional crystallization from a melt dominated magma chamber Here we show that most units of the Rustenburg Layered Suite can be derived with thermodynamic models of crustal assimilation by komatiitic magma to
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Marian B Holness R Grant Cawthorn James Roberts The thickness of the crystal mush on the floor of the Bushveld magma chamber Contributions to Mineralogy and Petrology 172 12 11 12 Nov 2024
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Bushveld Complex South Africa confirmed by xenoliths from kimberlite Grant Cawthorn Effective integration of sedimentological conceptual model into static model Gervasio Robles Hurtado Processing enhancements for full tensor gravity gradient data Adouley Guirou 09 30 Geophysical Modelling of the Bushveld Complex Janine Cole
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In the eastern Bushveld Complex the RLS is generally underlain by metasedimentary rocks of the Pretoria Group and overlain by the predominantly felsic volcanic rocks of the Rooiberg Group Cawthorn 1998 The extensive contact aureole extends up to 4 km normal to the contact and is up to 25 km wide in outcrop Metapelitic rocks are
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Bushveld Complex Documentation Description Letter from R Grant Cawthorn from the University of Witwatersrand Johannesburg Details the purchase of 14 samples from the Eastern Bushveld Complex with a map enclosed showing their sampling location Collection Geology Collection Parent record Geology Collection Parent record level Collection Hierarchy
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The Bushveld Complex South Africa is the largest layered intrusion on Earth and plays a considerable role in our understanding of magmatic differentiation and ore forming processes In this study we present new geochemical data for apatite hosted multiphase inclusions in gabbroic cumulates from the Bushveld Upper Zone Inclusions re homogenized at high temperature 1060 1100°C display a
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Karee mine Rustenburg District Bushveld complex South Africa 25 ∘ 40 ′ 17 ′′ S 27 ∘ 28 ′ 17 ′′ E Peter Koděra Juraj Majzlan Kilian Pollok Stefan Kiefer František Šimko Jarmila Luptáková and Grant Cawthorn
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in the Bushveld Complex By R Grant Cawthorn Phoscorite Carbonatite Pipe Complexes 134 By Juarez Fontana Platinum 2024 143 Thermophysical Properties of Palladium 144 By Claus Cagran and Gernot Pottlacher Abstracts 150 New Patents 154 Final Analysis Mercury as a Catalyst Poison 156 By J K Dunleavy
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The layered mafic rocks of the Bushveld Complex are derived from three magmatic lineages a lower part comprising the Lower and Critical Zones which crystallized from high Mg and Si parent liquids an isotopically distinct Lower Main Zone derived from more evolved aluminous tholeiitic liquids and a succession above the Pyroxenite Marker which includes the entire Upper Zone stemming from
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The Merensky and Bastard cyclic units and the Platreef of the Bushveld Complex consequences of Main Zone magma influxes and dynamics FJ Kruger Development of high resolution 3D vertical seismic profiles CC Pretorius MA Gibson and Q Snyman Geological interpretations from the PGE distribution in the Bushveld Merensky and UG2 chromitite reefs RG Cawthorn Stirred milling—new comminution
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South Africa SEG and Bushveld Complex A fundamental dispute A discussion of On some fundamentals of igneous petrology by Bruce D Marsh Contributions to Mineralogy and Petrology 2024 166 665 690 more
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Bushveld Complex R Grant Cawthorn Recent exploration in the Transvaal indicates possible new pia tin urn deposits but they are not likely to be payable jor some time South Africa and Bophuthatswana produce well over 50070 of the world s platinum and hold an even greater proportion of the world s known reserves Furthermore until
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The Bushveld Complex South Africa is the largest layered intrusion on Earth and plays a considerable role in our understanding of magmatic differentiation and ore forming processes In this study we present new geochemical data for apatite hosted multiphase inclusions in gabbroic cumulates from the Bushveld Upper Zone Inclusions re homogenized at high temperature 1060 1100 °C display
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Kontakt Institut für Geo und Umweltnaturwissenschaften Geochemie Albertstr 23b 79104 Freiburg Tel 0761 203 6396 Fax 0761 203 6407
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9 20am The centenary of the discovery of platinum in the Bushveld Complex Grant Cawthorn University of the the Merensky Reef the Platreef and analogous deposits of the Bushveld Complex new opportunities for exploration presentation only F Kruger Moruo Minerals South Africa 12 20pm Valuation of a mineral resource that has a compound metal content distribution An example based on
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By R Grant Cawthorn Christopher A Lee Robert P Schouwstra and Peter Mellowship Abstract The abundances of the platinum group elements PGE and their relative proportions are summarized for all the mines exploiting the Merensky Reef on both western and eastern limbs of the Bushveld Complex in South Africa
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Aqp Regulatory News Live AQP RNS Regulatory News Articles for
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Professor Grant Cawthorn indicates in a paper on the platinum and palladium resources of the Bushveld Complex published in the South African Journal of Science that it is generally understood
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Overview of the Bushveld Complex with Prof Grant Cawthorn SABLE data warehouse in house Languages isiZulu Native or bilingual proficiency English Full professional proficiency seTswana Limited working proficiency
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Detailed trace element analyses of pure magnetite from four continuous borehole intersections through the main magnetitite layer from the upper zone of the Rustenburg Layered Suite of the Bushveld Complex are presented One section has been analysed at one centimetre intervals Rapid depletion of Cr occurs over short vertical sequences near the base of the layer which is due to bottom
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