grant cawthorn bushveld complex

grant cawthorn bushveld complex

  • R. Grant Cawthorn University of the Witwatersrand, Johannesburg

    R. Grant Cawthorn. The concentrations of the rare earth elements (REEs) in apatite from a 600mthick sequence toward the top of the Bushveld Complex, South Africa, have previously been published they show two ranges of compositions in a lower section and an upper section. The data were interpreted in terms of liquid 

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  • Dr Paul Nex Associate Professor CIMERA

    After two years working in the petroleum industry as an MWD engineer he came out to South Africa to undertake postdoctoral research with Grant Cawthorn on the Bushveld Complex. From 20032007 Paul was a research fellow at the School of Geosciences undertaking research on the Platreef in collaboration with Anglo 

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  • The Platinum Group Element Deposits of the Bushveld Complex in

    There are enough platinum group element deposits in the Bushveld Complex in South Africa to supply world demands for many decades or even a century using current mining techniques. By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa.

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  • Bushveld 2006 Porter GeoConsultancy

    May 1, 2006 The first day of the tour was devoted to a classroom short course on the Formation, Geology & Metallogeny of the Bushveld Complex presented by the renowned expert, Prof. Grant Cawthorn, the Platinum Industry's Professor of Igneous Petrology, School of Geosciences, University of the Witwatersrand.

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  • Origin of the Pegmatitic Pyroxenite in the Merensky Unit, Bushveld

    Merensky Unit, Bushveld Complex,. South Africa. R. GRANT CAWTHORN* AND KEVIN BOERST. DEPARTMENT OF GEOSCIENCES, UNIVERSITY OF THE WITWATERSRAND, PO WITS, 2050, SOUTH AFRICA. RECEIVED MAY 20, 2005 ACCEPTED MARCH 3, 2006. ADVANCE ACCESS PUBLICATION MARCH 28, 

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  • Parental magma to the Bushveld Complex Nature

    The Bushveld Complex of South Africa is a large layered intrusive suite of cumulate rocks for which the parental magma is not directly obtainable. However, we report here indirect evidence from a suite of finegrained sills in the sediments below the Bushveld Complex. G. Davies, R. Grant Cawthorn & Merryl Morton 

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  • Merensky Reef Wikipedia

    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 

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  • [email protected] Wits University

    Gravity modelling of the Bushveld Complex ? Flexure of the crust. Jointly with Teresia Nguuri, Dr. David James, Prof. Grant Cawthorn, Prof. Tom Jordan. Seismological results support our earlier proposal that the Bushveld forms a continuous lopolith structure that has resulted in crustal flexure. This has important impliions 

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  • development of the platreef in the northern limb of the bushveld

    Oct 13, 2011 Gravity map of the Bushveld Complex (after Cawthorn & Webb 2001). Solid outline delimits surface outcrop of mafic rocks. Naldrett et al. (2008) propose a 'pudding basin' model for the marginal mineralisation of the Bushveld Complex. The authors note the absence of more differentiated cumulates and.

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  • R. Grant Cawthorn University of the Witwatersrand, Johannesburg

    R. Grant Cawthorn. The concentrations of the rare earth elements (REEs) in apatite from a 600mthick sequence toward the top of the Bushveld Complex, South Africa, have previously been published they show two ranges of compositions in a lower section and an upper section. The data were interpreted in terms of liquid 

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  • Bushveld (S. Africa) Details

    Loion Identifiers. A Bushveld Scientific Drilling Project (workshop proposal) (BUSHVELD). BUSHVELD proposal abstract. Geologic age: paleoproterozoic Number of drillsites (drillholes): Drilled length: m Cored length: Core recovered, length: Core recovered length / Cored length: Core recovered / Drilled length: .

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  • Emplacement and Crystallization Time for the Bushveld Complex

    PAGES 1669–1687. 1998. Emplacement and Crystallization Time for the Bushveld Complex. R. GRANT CAWTHORN1∗ AND FEODOR WALRAVEN2. 1DEPARTMENT OF GEOLOGY, UNIVERSITY OF THE WITWATERSRAND, PO WITS, 2050, SOUTH AFRICA. 2924 KEYTER STREET, DASPOORT, 0082, SOUTH AFRICA.

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  • The Residual or Roof Zone of the Bushveld Complex, South Africa

    Jun 18, 2013 The Residual or Roof Zone of the Bushveld Complex, South Africa Email: [email protected] Received July 2, 2012. Accepted May 13, 2013. Abstract. The geological succession of an area in the southeastern Bushveld Complex, South Africa is described here, in which up to 700 m of monzonitic 

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  • Origin of the Merensky Pegmatitic Pyroxenite, Bushveld Complex

    Origin of the Merensky Pegmatitic Pyroxenite, Bushveld Complex. R Grant Cawthorn and Kevin D. Boerst. Department of Geology,University of the Witwatersrand, PO Wits, 2050, South Africa. email: [email protected] The feldspathic pegmatitic pyroxenite associated with the platinum mineralization of the.

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  • Cooling of the Bushveld Complex, South Africa: Impliions for

    Abstract. Igneous rocks record the direction of the Earth's magnetic field as they cool through their Curie temperature. The mafic magmas of the 8kmthick Bushveld Complex of South Africa took 65 k.y. to be emplaced, 180 k.y. to solidify (to 900 °C), and a further 500 k.y. for the entire intrusion to cool below 580 °C, the Curie 

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  • Thermophysical properties of rocks from the Bushveld Complex

    The heat flux into a semiinfinite region with properties typical of the Bushveld Complex as a function of time is substantially lower than an equivalent model for the Witwatersrand Basin. Keywords: .. The author gratefully acknowledges reviews by Grant Cawthorn, Alex Rawlins, and Russel Ramsden. References. Ashwal 

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  • The Use of Phosphorus Contents in Yielding Estimates of the

    R. Grant Cawthorn and Kevin L. Walsh. Department of Geology, University of the Witwatersrand, 1 Jan Smuts Avenue, Johannesburg, 2001, South Africa. Abstract: Phosphorus contents in cumulus rocks occurring close to the level of apatite appearance in the basic rocks of the Bushveld Complex, South Africa, provide a 

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  • Sills associated with the Bushveld Complex, South Africa: an

    Jan 15, 1981 Cawthorn et al., 1979. R.G. Cawthorn, G.M. Biggar, C.M. Graham, A. Graham, C.E. Ford, M.R. Sharpe, G. DaviesExperimental petrological data on the parental magmas to the Bushveld Complex. Institute for Geological Research on the Bushveld Complex, University of Pretoria, Report, 18 (1979), p. 27.

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  • The Platinum Group Element Deposits of the Bushveld Complex in

    There are enough platinum group element deposits in the Bushveld Complex in South Africa to supply world demands for many decades or even a century using current mining techniques. By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa.

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  • Geological interpretations from the PGE distribution in the Bushveld

    CAWTHORN, R.G. Geological interpretations from the PGE distribution in the Bushveld Merensky and UG2 chromitite reefs. The 4th International Merensky around the entire Bushveld Complex. Possibly Grant has spent the last 35 years teaching igneous petrology at the University of the Witwatersrand, and has a 

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  • Platinum in South Africa InfoMine

    for Bushveld ores are 3 to 6 grams per tonne. In 1999, Professor Grant Cawthorn of the University of Witwatersrand estimated that the Bushveld Igneous Complex con tained proven and probable reserves of. 203.3 million ounces of platinum and. 116.1 million ounces of palladium, while inferred resources were calculated 

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  • Post Conference Field Trips 13th International Platinum Symposium

    Saturday 07 July 2018, Rustenburg, Rustenburg, Hunter's Rest, Upper Zone of the Bushveld Complex. Magaliesburg view point, Aerial Cableway. Vametco/Rhovan Mine, magnetite and anorthosites (to be confirmed). Sunday 08 July EASTERN BUSHVELD. Trip leaders: Grant Cawthorn, Paul Nex and Judith Kinnaird 

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  • INISmf—10444

    JOS LURIE AND GRANT CAWTHORN. (Technikon Witwatersrand and University of the Witwatersrand). Page 5. CONTENTS. FRONTISPICE: Geology of the Pilanesberg Complex and overlay with localities to be visited Transvaal at the contact of the granite and mafic phases of the Bushveld Complex. The almost perfectly 

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  • The Bushveld Complex, South Africa

    PO Wits, Johannesburg 2050, South Africa email: [email protected] Abstract The mafic rocks of the Bushveld Complex, South Africa, were emplaced into a stable cratonic shield some 2.06 b.y. ago, and have remained remarkably well preserved from deformation, metamorphism and low temperature alteration,.

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  • The Bushveld Complex, South Africa

    PO Wits, Johannesburg 2050, South Africa email: [email protected] Abstract The mafic rocks of the Bushveld Complex, South Africa, were emplaced into a stable cratonic shield some 2.06 b.y. ago, and have remained remarkably well preserved from deformation, metamorphism and low temperature alteration,.

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  • Emplacement and Crystallization Time for the Bushveld Complex

    Abstract. The Bushveld Complex formed by the crystallization of successive injections of magma, which were sufficiently closely spaced in time that each previous magma had not cooled and differentiated significantly before the addition of the next one. To constrain the emplacement and crystallization times, a thermal 

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  • Developments in Petrology ScienceDirect

    The online version of Developments in Petrology at ScienceDirect, the world's leading platform for high quality peerreviewed fulltext journals.

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  • relationship between pge and pgm in the bushveld complex

    The Bushveld Complex (Fig. 1) hosts over half of the world's platinumgroup element (PGE) reserves and resources (Cawthorn 1999a), and thus has had a major influence on the evolution of ideas on the genesis of such deposits. The PGE are hosted in three distinct layers (Lee 1996). The Merensky Reef and the Upper 

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