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grant cawthorn bushveld complex search results:

cawthorn grant cawthorn bushveld complex

Grant Cawthorn Bushveld Complex. Grant Cawthorn Bushveld Complex. Grant, cawthorn and kevin boerst.The genesis of the pegmatitic pyroxenite that often forms the base of the merensky unit in the bushveld complex is re-examined.Large gt1 cm orthopyroxene grains contain tricuspidate inclusions of plagioclase, and chains and rings of chromite grains, which are interpreted to have grown by.

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R. Grant Cawthorn

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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Rare earth element abundances in apatite in the Bushveld ...

Rare earth element abundances in apatite in the Bushveld Complex—A consequence of the trapped liquid shift effect: REPLY R. Grant Cawthorn. R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, PO Wits 2050, South Africa. Search for other works by this author on: GSW.

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Grant Cawthorn Bushveld Complex - haagdeko

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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Grant Cawthorn Bushveld Complex

grant cawthorn bushveld complex werkplaatsdansenbeeld 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. grant cawthorn bushveld complex 3d-day

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Grant Cawthorn - Academia

by Grant Cawthorn ... 3D gravity and magnetic model of the Bushveld Complex, South Africa Susan Webb*, Grant ... Maré, LP, Oosthuizen, BC, and Tabane, LR,

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Grant Cawthorn – The Conversation

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 - taxitamtam

The Residual or Roof Zone of the Bushveld Complex, South ... The Residual or Roof Zone of the Bushveld Complex, South Africa R. GRANT CAWTHORN* SCHOOL OF GEOSCIENCES, UNIVERSITY OF THE WITWATERSRAND, P.O. WITS, 2050, SOUTH AFRICA . grant cawthorn bushveld complex - juegosdepintarunas

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Re-evaluation of magma compositions and processes in the ...

Cawthorn, R. Grant and Spies, Liana 2003. Plagioclase content of cyclic units in the Bushveld Complex, South Africa. Contributions to Mineralogy and Petrology, Vol. 145, Issue. 1, p. ... Filling the Bushveld Complex magma chamber: lateral expansion, roof and floor interaction, magmatic unconformities, and the formation of giant chromitite, ...

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A non-horizontal floor during accumulation of the Bushveld ...

Grant Cawthorn, R. Abstract. Many models of igneous layered complexes assume that the instantaneous boundary between accumulated grains and overlying magma was horizontal. 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 of heating ...

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RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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. Grades for the mined reef interval are uniform over 100 km of strike length, at 5–7 g/t ...

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Representative Whole-rock Compositions Obtained by XRF ...

Download Table Representative Whole-rock Compositions Obtained by XRF Analysis from publication: The Merensky Reef, Bushveld Complex: Mixing of Minerals Not Mixing of Magmas A major ...

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grant cawthorn bushveld complex - kzsp

grant cawthorn bushveld complex. As a professional and experienced manufacturer of mobile crusher,jaw crusher, cone crusher,impact crusher,ball mill,super fine mill and vertical mill. New UPb age and paleomagnetic constraints from the .

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grant cawthorn bushveld complex - taxitamtam

The Residual or Roof Zone of the Bushveld Complex, South ... The Residual or Roof Zone of the Bushveld Complex, South Africa R. GRANT CAWTHORN* SCHOOL OF GEOSCIENCES, UNIVERSITY OF THE WITWATERSRAND, P.O. WITS, 2050, SOUTH AFRICA . grant cawthorn bushveld complex - juegosdepintarunas

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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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grant cawthorn bushveld complex - darelhouda

grant cawthorn bushveld complex. grant cawthorn bushveld complex The Platinum Group Element Deposits of the Bushveld 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 techniqu Demonstrated reserves and resources published by ...

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grant cawthorn bushveld complex - noomenadvocatuur

grant cawthorn bushveld complex grant cawthorn bushveld complex . 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.

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grant cawthorn bushveld mplex - lesmoineaux

grant cawthorn bushveld complex - griffonner. 2014-7-25 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

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Mineral layering in the Bushveld Complex; implications of ...

T. S. McCarthy, R. Grant Cawthorn, C. J. Wright, J. R. McIver; Mineral layering in the Bushveld Complex; implications of Cr abundances in magnetite from closely spaced magnetitite and intervening silicate-rich layers.

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(PDF) Parental magma to the Bushveld Complex

Cawthorn (2007) suggested that the magma of the Lower zone (Bushveld complex) was close in composition to the parental magma calculated by Davies et al. (1980) and Harmer and Sharpe (1985).

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grant cawthorn bushveld complex - zdravyvzhled

grant cawthorn bushveld complex hifilm. 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 ...

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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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grant cawthorn bushveld complex - rebesko

The mafic rocks of the Bushveld Complex form a 6 km thick intrusion, ... Grant Cawthorn Judith Kinnaird Gold2000.N.247 Department of Geology, Private Bag 3, ... platinum mining bushveld complex. The Platinum Group Element Deposits of the Bushveld Complex By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3 ...

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grant cawthorn bushveld complex - shalatikrugerlodge.co

Apr 29, 2015  R. Grant Cawthorn ResearchGate. Geometrical relations between the Transvaal Supergroup, the Rooiberg Group, and the mafic rocks of the Bushveld Complex a discussion (S.Afr. J. Geol.,101, 275 279) Reply Article Jun 1999

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grant cawthorn bushveld complex - maksur

Grant Cawthorn Bushveld Complex - haagdeko. 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

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grant cawthorn bushveld complex - thenook.co

R. Grant Cawthorn Contrasting sulphide contents of the Bushveld and Sudbury Igneous Complexes Received: 12 August 2004/ Accepted: 28 January 2005/Published online: 12 April 2005 Springer-Verlag 2005 Abstract The Sudbury Igneous Complex (SIC) contains abundant sulphides, especially near the base, and hosts one of the world's largest nickel and ...

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Sills associated with the Bushveld Complex, South Africa ...

Jan 15, 1981  Sills associated with the Bushveld Complex, South Africa: an estimate of the parental magma composition Author links open overlay panel R. Grant Cawthorn a G. Davies a A. Clubley-Armstrong b T.S. McCarthy a

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grant cawthorn bushveld complex - rebesko

The mafic rocks of the Bushveld Complex form a 6 km thick intrusion, ... Grant Cawthorn Judith Kinnaird Gold2000.N.247 Department of Geology, Private Bag 3, ... platinum mining bushveld complex. The Platinum Group Element Deposits of the Bushveld Complex By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3 ...

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grant cawthorn bushveld complex - shalatikrugerlodge.co

Apr 29, 2015  R. Grant Cawthorn ResearchGate. Geometrical relations between the Transvaal Supergroup, the Rooiberg Group, and the mafic rocks of the Bushveld Complex a discussion (S.Afr. J. Geol.,101, 275 279) Reply Article Jun 1999

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Origin of Anorthosite and Magnetitite Layers in the ...

In the case of the Bushveld Complex, the proportion of trapped liquid in Main and Upper Zone rocks is typically about 10% (Cawthorn McCarthy, 1985). This component would contribute about 6% more plagioclase and 4% of mainly pyroxene (and oxide in the Upper Zone).

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Developments in Petrology Layered Intrusions ...

Edited by Richard Grant Cawthorn. Volume 15, Pages 1-531 (1996) Download full volume. Previous volume. Next volume. Actions for selected chapters. Select all / Deselect all. ... A Review of Mineralization in the Bushveld Complex and some other Layered Intrusions. C.A. Lee. Pages 103-145 Download PDF. Chapter preview.

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Contrasting sulphide contents of the Bushveld and Sudbury ...

Apr 12, 2005  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. Econ Geol 97:663–666. Google Scholar Cawthorn RG, Webb SJ (2001) Connectivity between the western and eastern limbs of the Bushveld complex.

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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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Sills associated with the Bushveld Complex, South Africa ...

Four distinct ages of sills intrude the floor rocks under the Bushveld Complex. The first is a metadolerite and pre-dates the Bushveld Complex. The middle two are generally related to the Complex itself. One has quench-textured olivine and orthopyroxene crystals and chemically equates to the parental magma of the Bushveld Complex. The second suite is a hypersthene microgabbro, representative ...

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The Bushveld Large Igneous Province

Mashaneng Complex Uitkomst Complex 2044 ± 242 2054 ± 23 2044 ± 84 (2055 +45/-17)4 Table 2 Recent age dates for various component of the Bushveld LIP. 1From Harmer and Armstrong (2000) 2Kruger (1989) 3 Mapeo et al., (2004) 4de Waal et al., (2001).

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