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grant cawthorn bushveld complex

Emplacement and Crystallization Time for the Bushveld Complex

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 cawthorn and walraven bushveld complex crystallization time fig. 4.

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Parental magma to the Bushveld Complex Nature

Sep 04, 1980· The Bushveld Complex of South Africa is a large layered intrusive suite of cumulate rocks for which the parental magma is not directly obtainable. R. Grant Cawthorn

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Origin of the Merensky Pegmatitic Pyroxenite, Bushveld

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. e-mail: [email protected] The feldspathic pegmatitic pyroxenite associated with the platinum mineralization of the Merensky Reef, Bushveld Complex, has been

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grant cawthorn bushveld complex MC World

Emplacement and Crystallization Time for the Bushveld Complex. 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 cawthorn and walraven bushveld complex crystallization time fig. 4.

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grant cawthorn bushveld complex buitenseizoen

grant cawthorn bushveld complex. Vertical chemical gradients in a single grain of magnetite . of magnetite from the Bushveld Complex, South Africa R. GRANT CAWTHORN, T. S. McCARTHY, AND G. DAVIES Department of Geology, University of the Witwatersrand, Jan Smuts Avenue, Johannesburg 2001, South Africa A B S T R A C T. Very large crystals of magnetite, up to 2 cm,

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The Bushveld Complex, South Africa SpringerLink

May 19, 2015· Tegner C, Cawthorn RG, Kruger FJ (2006) Cyclicity in the main and upper zones of the Bushveld Complex, South Africa: crystallization from a zoned magma sheet. J Petrol 47:2257–2279 Google Scholar Teigler B, Eales HV (1993) Correlation between chromite composition and PGE mineralization in the critical zone of the western Bushveld Complex.

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R. Grant Cawthorn ResearchGate

R. Grant Cawthorn. J. Miller. In the case of the Bushveld Complex, several km of hot, dense magma intruded into low-density sandstones and shales. This unstable density profile and the effect

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The Merensky Reef, Bushveld Complex: Mixing of Minerals

Charlie L. Seabrook, R. Grant Cawthorn, F. Johan Kruger; The Merensky Reef, Bushveld Complex: Mixing of Minerals Not Mixing of Magmas. A major geochemical hiatus occurs in the Bushveld Complex at the level of the platiniferous Merensky reef, close to the Critical-Main zone boundary. The origin of this hiatus and its relationship to

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Grant Cawthorn The Conversation

Jun 09, 2015· Grant Cawthorn’s profile on The Conversation. Main fields of specialization: Origin of mafic igneous intrusive rocks and their mineral deposits.

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grant cawthorn bushveld complex buitenseizoen

grant cawthorn bushveld complex. Vertical chemical gradients in a single grain of magnetite . of magnetite from the Bushveld Complex, South Africa R. GRANT CAWTHORN, T. S. McCARTHY, AND G. DAVIES Department of Geology, University of the Witwatersrand, Jan Smuts Avenue, Johannesburg 2001, South Africa A B S T R A C T. Very large crystals of magnetite, up to 2 cm,

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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. R. Grant Cawthorn. View author publications

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The Merensky Reef, Bushveld Complex: Mixing of Minerals

Charlie L. Seabrook, R. Grant Cawthorn, F. Johan Kruger; The Merensky Reef, Bushveld Complex: Mixing of Minerals Not Mixing of Magmas. A major geochemical hiatus occurs in the Bushveld Complex at the level of the platiniferous Merensky reef, close to the Critical-Main zone boundary. The origin of this hiatus and its relationship to

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The extension of the western limb, Bushveld Complex (South

Cawthorn, R.G. (1996) Re-evaluation of magma composition and processes in the uppermost Critical Zone of the Bushveld Complex. Mineralogical Magazine,60,131 148 . Cawthorn,R.G. and Webb. SJ. ( 2002 ) Connectivity between eastern and western limbs of the Bushveld Complex .

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grant cawthorn bushveld complex hifilm.pl

Grant Cawthorn Bushveld Complex. The bushveld complex of south africa is a large layered intrusive suite of cumulate rocks for which the pare. READ MORE. Grant Cawthorn The Conversation. Jun 09, 2015· Grant Cawthorn's profile on The Conversation. Main fields of specialization: Origin of mafic igneous intrusive rocks and thei

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Massive pyroxene compositional oscillations on a metre

Mar 01, 2020· Author links open overlay panel R. Grant Cawthorn. In the Main Zone of the Bushveld Complex, South Africa, there is an horizon known as the Pyroxenite Marker that shows major reversals in mineral compositions, demonstrating significant addition of more primitive magma into the chamber. This layer has been well-studied in the eastern limb

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Emplacement and Crystallization Time for the Bushveld Complex

Introduction. The Bushveld Complex (BC) is a large layered intrusion, emplaced into a stable cratonic setting. It has been considered an intrusive equivalent of a continental flood basalt province, and inferred to be related to a mantle plume (Hatton, 1995).The duration of continental flood basaltic magmatism may be of the order of several million years.

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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

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Bushveld Igneous Complex Wikipedia

The Bushveld Igneous Complex (BIC) is the largest layered igneous intrusion within the Earth's crust. It has been tilted and eroded forming the outcrops around what appears to be the edge of a great geological basin: the Transvaal Basin.It is approximately 2 billion years old and is divided into four different limbs: the northern, southern, eastern, and western limbs.

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Grant Cawthorn Bushveld Complex haagdeko.de

Geochemistry Of Magnetitite Layers In The Upper Zone Of . 2015-9-16geochemistry of magnetitite layers in the upper zone of the bushveld complex, south africa y ramphelane prince maila i would like to thank my supervisor prof grant cawthorn for his invaluable support and insight during the

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Identification of Anorthite-enriched Plagioclase

The setting and stratigraphy of the Bushveld Complex has been reviewed many times [most recently by Cawthorn (2015)], and only a brief summary of relevant information is given here. The laterally extremely extensive (and uniform) layering of the Bushveld Complex has been subdivided (into four major layered successions) based on mineral

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Contrasting sulphide contents of the Bushveld and Sudbury

Apr 12, 2005· Cawthorn RG (1999) Platinum-group element mineralization in the Bushveld Complex—a critical reassessment of geochemical models. S Afr J Geol 102:268–281 Google Scholar Cawthorn RG (2002) The role of magmatic mixing in the genesis of PGE mineralization in the Bushveld complex: thermodynamic calculations and new interpretations—a discussion.

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The Platinum Group Element Deposits of the Bushveld

By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa; E-mmail: [email protected] 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.

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The Merensky Reef and UG2 layers at De Wildt, western limb

This thesis was improved by the careful review of Prof. Grant Cawthorn . 6 LIST OF FIGURES . Figure 1: General geological map of the Bushveld Complex (adapted from Van der Merwe and Cawthorn 2005). The main limbs of the complex are shown; Western Limb, Eastern Limb and Northern Limb.

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