grant cawthorn bushveld complex

Grant Cawthorn Bushveld Complex

grant cawthorn bushveld complex - jazzneersel.nl

grant cawthorn bushveld complex Thermophysical properties of rocks from the Bushveld Complex In the latter period, platinum mining depths in the Bushveld Complex (to the north of the .....

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

R. Grant Cawthorn | University of the Witwatersrand ...

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 ...

grant cawthorn bushveld mplex - verbionhandel.nl

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

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.

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.

Emplacement and Crystallization Time for the Bushveld Complex

Sep 01, 1998 · General geology of the Bushveld Complex, compiled from numerous sources summarized by Eales & Cawthorn (1996). The Marginal Zone ranges in thickness from 0 to (in one extreme case) 800 m, consists of medium-grained norite and pyroxenite, and shows abundant evidence of crustal assimilation (xenoliths of metasedimentary rock and high modal biotite and quartz content).

Emplacement and Crystallization Time for the Bushveld Complex

CAWTHORN AND WALRAVEN BUSHVELD COMPLEX CRYSTALLIZATION TIME Fig. 2. Generalized stratigraphy of the Eastern and Western limbs, showing appearance of cumulus minerals and their compositions. Initial 87Sr/86Sr ratio (R o) for whole-rock and plagioclase separates (from Kruger, 1994) is also shown. Maximum thicknesses (in m) of the Eastern and

The Platinum Group Element Deposits of the Bushveld ...

R. Grant Cawthorn is the Platinum Industrys Professor of Igneous Petrology at the University of the Witwatersrand, South Africa. His main research interests are the genesis of the Bushveld Complex and its chromite, platinum and vanadiferous magnetite deposits, and the …

Bushveld Igneous Complex - Wikipedia

The Bushveld Igneous Complex (BIC) is the largest layered igneous intrusion within the Earths 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.

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

Bushveld Complex R. GRANT CAWTHORN Department of Geology, University of the Witwatersrand, Wits, 2050, Republic of South Africa Abstract A detailed geochemical study is presented of the uppermost Critical Zone, especially of the footwall and hanging wall to the Merensky Reef, at Impala Platinum Mines in the Bushveld Complex. The approximately

Identification of Anorthite-enriched Plagioclase ...

May 03, 2019 · Geological map of the Bushveld Complex (after Cawthorn, 2013) showing the locations of the three drill holes (one in each limb) mentioned in the text (Bierkraal, Bellevue and Roossenekal). Fig. 1 Open in new tab Download slide

of magnetite from the Bushveld Complex, South Africa

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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 lement in magnetite) quite different from the concentric zonation often found, for example, in feldspars in intrusive rocks.

grant cawthorn bushveld complex - etsiviaggiarecisl.it

grant cawthorn bushveld complex - zvchattrick.be. Grant Cawthorn - Academiaedu. Grant Cawthorn studies Rare Earth , 3D gravity and magnetic model of the Bushveld Complex, South Africa Susan Webb*, Grant , 3D gravity and magnetic model of the .

Cawthorn, R. Grant [WorldCat Identities]

Petrochemistry of the Okiep Copper District basic intrusive bodies, northern Cape Province, South Africa by R. Grant Cawthorn ( Book ) 1 edition published in 1992 in English and held by 14 WorldCat member libraries worldwide

RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD …

BibTeX @MISC{Cawthorn_relationshipbetween, author = {R. Grant Cawthorn and Christopher A. Lee and Robert P. Schouwstra and Peter Mellowship}, title = {RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX}, year = {}}

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

The Merensky Reef and UG2 layers at De Wildt, western limb of the Bushveld Complex. by. Zamani Addmore DUBE. (0303958G) Thesis submitted to the Faculty of Science, University of the Witwatersrand Johannesburg in partial fulfilment of the requirements for the degree of Master of Science.

SUSPECTED PRESENCE OF HIBBINGITE IN ... - GeoScienceWorld

suspected presence of hibbingite in olivine pyroxenite adjacent to the ug2 chromitite, bushveld complex, south africa r. grant cawthorn. ... r. grant cawthorn, caroline luvhimbe, martin slabbert; suspected presence of hibbingite in olivine pyroxenite adjacent to the ug2 chromitite, bushveld complex, …

Chromite is the Key to PGE - Duke University

Naldrett, 1989), in which a very high ratio of magma to an immiscible sulfide liquid (R-factor) associated with magma influx and mixing is invoked, gained favour due to the presence of sulfide in the Merensky Reef. However, this model has recently been discredited for PGE in …

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