Emplacement and Crystallization Time for the Bushveld Complex
journal of petrology volume 39 number 9 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 received july 20, 1997; revised typescript accepted april 16, 1998
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
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. e-mail: [email protected] The feldspathic pegmatitic pyroxenite associated with the platinum mineralization of the Merensky Reef, Bushveld Complex, has been
Emplacement and Crystallization Time for the Bushveld Complex
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
grant cawthorn bushveld complex - paulgabriel
Sills associated with the Bushveld Complex, South Africa ,Grant Cawthorn, R; Davies, G; Clubley-Armstrong, A; McCarthy, T S Affiliation: , 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 Platinum Group Element Deposits of the Bushveld,
The Platinum Group Element Deposits of the Bushveld Complex in South Africa By R. Grant Cawthorn School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa E-mail: [email protected] Article Synopsis
The Bushveld Complex, South Africa | SpringerLink
19-05-2015· 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, at least partly by its isostatic impact on the entire crustal thickness.
R. CAWTHORN | University of the Witwatersrand,
R. Grant Cawthorn The Pilanesberg Complex (South Africa) is one of the world's largest but least studied alkaline complexes. It consists of trachytes, phonolites, syenites and
Massive pyroxene compositional oscillations on a metre,
01-03-2020· The other three (Cawthorn et al., 1991; Karykowski et al., 2017; Mangwegape et al., 2016) are from borecore, and so maps of the Bushveld Complex cannot include such a unit. Setera and VanTongeren (2018) stated “The stratigraphy from the Pyroxenite Marker to the roof of the intrusion..... has been termed the UUMZ”, but do not state how it should be defined in
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
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
Emplacement and Crystallization Time for the Bushveld Complex
R. Grant Cawthorn, Feodor Walraven, Emplacement and Crystallization Time for the Bushveld Complex, Journal of Petrology, Volume 39, Issue 9, September 1998, Pages 1669–1687,, The Bushveld Complex formed by the crystallization of successive injections of magma,,
grant cawthorn bushveld complex - paulgabriel
Sills associated with the Bushveld Complex, South Africa ,Grant Cawthorn, R; Davies, G; Clubley-Armstrong, A; McCarthy, T S Affiliation: , 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
RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX,
R. Grant Cawthorn, Christopher A. Lee, Robert P. Schouwstra, Peter Mellowship;, 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,,
The Bushveld Complex, South Africa | Semantic Scholar
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, at least partly by its isostatic impact on the entire crustal thickness. The generation and emplacement of possibly 1 million km3 of magma within
[PDF] The Platinum Group Element Deposits of the Bushveld,
School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa; E-mail: [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. Demonstrated reserves and resources
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10-06-2020· grant cawthorn bushveld mplexverbionhandel . 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 suppl. Chat Online; crusher for sale in musmining masqat oman. crusher for sale in musmining masqat oman. Crusher Sand Buyers In Oman .
Contrasting sulphide contents of the Bushveld and Sudbury,
12-04-2005· 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.
Massive pyroxene compositional oscillations on a metre,
01-03-2020· The other three (Cawthorn et al., 1991; Karykowski et al., 2017; Mangwegape et al., 2016) are from borecore, and so maps of the Bushveld Complex cannot include such a unit. Setera and VanTongeren (2018) stated “The stratigraphy from the Pyroxenite Marker to the roof of the intrusion..... has been termed the UUMZ”, but do not state how it should be defined in
Emplacement and Crystallization Time for the Bushveld Complex
R. Grant Cawthorn, Feodor Walraven, Emplacement and Crystallization Time for the Bushveld Complex, Journal of Petrology, Volume 39, Issue 9, September 1998, Pages 1669–1687,, The Bushveld Complex formed by the crystallization of successive injections of magma,,
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
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
grant cawthorn bushveld complex - paulgabriel
Sills associated with the Bushveld Complex, South Africa ,Grant Cawthorn, R; Davies, G; Clubley-Armstrong, A; McCarthy, T S Affiliation: , 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
[PDF] The Platinum Group Element Deposits of the Bushveld,
School of Geosciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa; E-mail: [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. Demonstrated reserves and resources
Two expressions of the transition from mafic cumulates to,
Two expressions of the transition from mafic cumulates to granitoids in the Bushveld Complex, South Africa: Examples from the western and eastern, Christian Tegnera, Charles E. Leshera,b, R. Grant Cawthornc a Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, Cawthorn (2013) described a newly discovered zone of,
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.
ball mill size and price india grant cawthorn bushveldple
10-06-2020· grant cawthorn bushveld mplexverbionhandel . 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 suppl. Chat Online; crusher for sale in musmining masqat oman. crusher for sale in musmining masqat oman. Crusher Sand Buyers In Oman .
Evidence from trace element geochemistry for multiple,
Cawthorn, 1980; Kruger and Marsh, 1982; Von Gruenewaldt, 1973). A satellite intrusion of the Bushveld Complex, the Losberg Complex; crops out to the south of the Bushveld Complex (Jansen, 1954) and geochemicar data have been presented (Danchin and Ferguson, 1970). These data are used to test the various hypotheses
Massive pyroxene compositional oscillations on a metre,
01-03-2020· The other three (Cawthorn et al., 1991; Karykowski et al., 2017; Mangwegape et al., 2016) are from borecore, and so maps of the Bushveld Complex cannot include such a unit. Setera and VanTongeren (2018) stated “The stratigraphy from the Pyroxenite Marker to the roof of the intrusion..... has been termed the UUMZ”, but do not state how it should be defined in
