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Journal Article

A High-Resolution Geochemical and Petrological Investigation of Bifurcating Chromitite Layers of the UG1 Footwall at Impala Platinum Mine, Rustenburg

Frederick Roelofse, Justine Magson, Mariska Nicholson, Tshepo Nyakane

Journal: The Canadian Journal of Mineralogy and Petrology

Publisher: Mineralogical Association of Canada

Published: 21 August 2024

The Canadian Journal of Mineralogy and Petrology (2024)

DOI: https://doi.org/10.3749/2300068

... of the UG1 exposed by mining activities at No. 11 Shaft, Impala Platinum Mine, Rustenburg. Samples were taken from four sample cuts across the footwall exhibiting complex chromitite bifurcations in order to study lateral and vertical variations in the mineral chemistry of plagioclase and chromite and the Sr...

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Early Publication

Journal Article

Platinum-group elements in the UG1 and UG2 chromitites, and the Bastard reef, at Impala platinum mine, western Bushveld Complex, South Africa: Evidence for late magmatic cumulate instability and reef constitution

Wolf Maier, Sarah-Jane Barnes

Journal: South African Journal of Geology

Publisher: Geological Society of South Africa

Published: 01 September 2008

South African Journal of Geology (2008) 111 (2-3): 159–176.

DOI: https://doi.org/10.2113/gssajg.111.2-3.159

...Wolf Maier; Sarah-Jane Barnes Abstract We have examined the UG1 and UG2 chromitites, the Bastard Reef, and ultramafic rocks in the footwall of the Merensky Reef that are possibly correlatives to the Pseudoreef, in drill core at Impala platinum mine. The UG2 consists of a 66 cm main seam and, ca 5 m...

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a. Variation in PGM and PGE distribution from A, B and C reefs at the Impal...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

F ig . 11. a. Variation in PGM and PGE distribution from A, B and C reefs at the Impala mine. Data from an Impala mine unpublished report. The PGM distribution has been simplified into three groups: Pt and Pd sulfides, tellurides and arsenides, and alloys and metals, to simplify comparison

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a. Variation in PGM and PGE distribution from A, B and C reefs at the Impal...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

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VARIATION IN PGE DISTRIBUTION BETWEEN NORMAL AND POTHOLE REEF AT THE <span class="search-highlight">IMPALA</span>...

VARIATION IN PGE DISTRIBUTION BETWEEN NORMAL AND POTHOLE REEF AT THE IMPALA...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

TABLE 2. VARIATION IN PGE DISTRIBUTION BETWEEN NORMAL AND POTHOLE REEF AT THE IMPALA MINE

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TOTAL PGE CONTENT OF SECTIONS THROUGH NORMAL (A) AND POTHOLE (C) REEF AT TH...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

TABLE 3. TOTAL PGE CONTENT OF SECTIONS THROUGH NORMAL (A) AND POTHOLE (C) REEF AT THE IMPALA MINE

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PGM distribution for the Merensky Reef at all <span class="search-highlight">mines</span> in the western limb, an...

PGM distribution for the Merensky Reef at all mines in the western limb, an...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

Impala mine.

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Schematic cross section through the Merensky Reef in the southwestern Bushv...

in Isoferroplatinum-pyrrhotite-troilite intergrowth as evidence of desulfurization in the Merensky Reef at Rustenburg (western Bushveld Complex, South Africa) > Mineralogical Magazine

Published: 01 October 2016

Fig. 2. Schematic cross section through the Merensky Reef in the southwestern Bushveld Complex, from Impala Mines (NW) to Eastern Platinum Mines (SE) showing the different facies types. The samples investigated are from Rustenburg thin reef facies (modified from Naldrett et al. , 2011 ).

Journal Article

The platinum-group mineralogy of the Merensky Reef at the Impala platinum mines, Bophuthatswana

A. B. Mostert, P. K. Hofmeyr, G. A. Potgieter

Journal: Economic Geology

Publisher: Society of Economic Geologists

Published: 01 October 1982

Economic Geology (1982) 77 (6): 1385–1394.

DOI: https://doi.org/10.2113/gsecongeo.77.6.1385

...A. B. Mostert; P. K. Hofmeyr; G. A. Potgieter Abstract The platinum-group mineralogy of the Merensky Reef at the Impala platinum mines, South Africa, has been investigated. Polished sections were prepared from pyroxenitic and pegmatoidal reef samples collected underground. Microscope studies were...

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( a ) Generalized tectonic and geological overview of the western part of t...

in 40 Ar/ 39 Ar age constraints on ore deposition and cooling of the Bushveld Complex, South Africa > Journal of the Geological Society

Published: 01 May 2004

) Simplified geological map of southwestern zone near Rustenburg with the location of the Impala Mine.

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Sample of Merensky Reef from the near-vertical sidewall of an undercut poth...

in Spatial association between platinum minerals and magmatic sulfides imaged with the Maia Mapper and implications for the origin of the chromite-sulfide-PGE association > The Canadian Mineralogist

Published: 27 May 2021

Fig. 7. Sample of Merensky Reef from the near-vertical sidewall of an undercut pothole, Impala Mine. The centers of yellow rings are Pt hotspots. (A) Cr-Fe-Ca map. (B) Ni-Cu-Fe map with chromite in gray for reference. (C) Enlarged area of (B). Pt hotspots ringed in yellow. Note the similar number

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Example of vertical distribution of the PGE from two sections across A (nor...

in RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX > The Canadian Mineralogist

Published: 01 April 2002

F ig . 10. Example of vertical distribution of the PGE from two sections across A (normal) and C (pothole) Merensky reef at the Impala mine, shown by solid and open symbols respectively. Continuous sampling every 10 cm is employed, except in the pothole reef, where the entire 60 cm-thick

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The Stratigraphy of Footwall Unit 6 at <span class="search-highlight">Impala</span> Platinum <span class="search-highlight">Mine</span> in the vicinity...

The Stratigraphy of Footwall Unit 6 at Impala Platinum Mine in the vicinity...

in The Tennis Ball Marker in the south-eastern Bushveld Complex: comparison with the Boulder Bed of the Western Bushveld Complex and proposed genesis by disaggregation of intrusive sills in processes akin to those involved in the formation of peperites and mafic enclave swarms > South African Journal of Geology

Published: 01 December 2023

Figure 9. The Stratigraphy of Footwall Unit 6 at Impala Platinum Mine in the vicinity of 5 shaft (in the north of the property) and 1 Shaft (in the south of the property) after Jones ( 1976 ), with stratigraphic subdivisions of Footwall Unit 6 (FW6) after Leeb du-Toit ( 1986 ). At 5 Shaft

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Sketch of a typical UG2 pothole ( a ) at the <span class="search-highlight">Impala</span> Platinum <span class="search-highlight">Mine</span>, Western ...

Sketch of a typical UG2 pothole ( a ) at the Impala Platinum Mine, Western ...

in Misinterpretation of zircon ages in layered intrusions > South African Journal of Geology

Published: 01 March 2022

Figure 7. Sketch of a typical UG2 pothole ( a ) at the Impala Platinum Mine, Western Bushveld Complex. The UG2 Unit cuts through cumulates belonging to the UG1 Unit, indicating that the former must be younger than the latter. The zircon isotopic ages suggest, however, that the UG2 Unit pyroxenite

Journal Article

RELATIONSHIP BETWEEN PGE AND PGM IN THE BUSHVELD COMPLEX

R. Grant Cawthorn, Christopher A. Lee, Robert P. Schouwstra, Peter Mellowship

Journal: The Canadian Mineralogist

Publisher: Mineralogical Association of Canada

Published: 01 April 2002

The Canadian Mineralogist (2002) 40 (2): 311–328.

DOI: https://doi.org/10.2113/gscanmin.40.2.311

...F ig . 11. a. Variation in PGM and PGE distribution from A, B and C reefs at the Impala mine. Data from an Impala mine unpublished report. The PGM distribution has been simplified into three groups: Pt and Pd sulfides, tellurides and arsenides, and alloys and metals, to simplify comparison...

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Variations in (A) V, (B) Ga, (C) Mn, (D) Co, (E) Ni, and (F) Zn across the ...

in A comparison of trace element concentrations in chromite from komatiites, picrites, and layered intrusions: implications for the formation of massive chromite layers > Canadian Journal of Earth Sciences

Published: 02 November 2022

Fig. 19. Variations in (A) V, (B) Ga, (C) Mn, (D) Co, (E) Ni, and (F) Zn across the UG2 at Waterval Mine and Impala and the UG1 at Impala. Note that the elements do not decrease as they would if chromite-only crystallized. Range represents the range of 5 chromite grains in the same thin section.

Journal Article

VARIATIONS IN THE NATURE OF THE PLATINUM-GROUP MINERALS IN A CROSS-SECTION THROUGH THE MERENSKY REEF AT IMPALA PLATINUM: IMPLICATIONS FOR THE MODE OF FORMATION OF THE REEF

Hazel M. Prichard, Sarah-Jane Barnes, Wolfgang D. Maier, Peter C. Fisher

Journal: The Canadian Mineralogist

Publisher: Mineralogical Association of Canada

Published: 01 April 2004

The Canadian Mineralogist (2004) 42 (2): 423–437.

DOI: https://doi.org/10.2113/gscanmin.42.2.423

... prélevés d’une section du banc de Merensky à la mine Impala Platinum, sur la ferme Reinkoyalskraal, dans la partie occidentale du complexe de Bushveld, en Afrique du Sud, démontre que la mélanorite, la leuconorite et l’anorthosite contiennent un assemblage de MGP fait presqu’exclusivement de...

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Conceptual model showing the development of bifurcated chromitite in the UG...

in Abstracts from the 14th International Platinum Symposium and the Wager & Brown Workshop Technical Session > The Canadian Journal of Mineralogy and Petrology

Published: 28 December 2023

Fig. 5. Conceptual model showing the development of bifurcated chromitite in the UG-1 footwall at 11 Shaft, Impala Platinum Mines, Rustenburg. See text for details.

Journal Article