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Bobbejaan Mine

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Ternary diagram of three major components of relevance for the garnets of t...
Published: 01 May 2019
Fig. 1 Ternary diagram of three major components of relevance for the garnets of this study; pyrope (pyr)–almandine (alm)–grossular (gro). This sample suite covers a wider compositional range. Roberts Victor pipe samples are labeled SRV and XM, Bobbejaan mine samples are denoted by SBB.
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( A ) Roberts Victor <span class="search-highlight">Mine</span> (South Africa) CROL dike—blow—pipe system. Re-dra...
Published: 01 July 2022
Figure 12. ( A ) Roberts Victor Mine (South Africa) CROL dike—blow—pipe system. Re-drawn after Wagner (1914) , Gurney and Kirkley (1996) and de Wit et al. (2016) . Bobbejaan Mine (Bellsbank area, South Africa), CROL en-echelon dike system. Adapted and re-drawn from Clement et al. (1973
Journal Article
Published: 01 August 1991
American Mineralogist (1991) 76 (7-8): 1141–1152.
...Roberta Oberti; Florie A. Caporuscio Abstract Single-crystal X-ray structure refinements of a series of geochemically well-characteized clinopyroxenes from grospydite and eclogite xenoliths from the Roberts Victor and Bobbejaan diamond mines, South Africa, have been carried out. The study was done...
Journal Article
Published: 01 April 2001
The Canadian Mineralogist (2001) 39 (2): 361–376.
...) are uncommon. Unusually Fe- and Ni-rich macrocrysts unique to the Lace mine are from Fe-rich orthopyroxene-bearing peridotites or pyroxenites that may be the product of impact-induced mantle melting associated with the Vredefort structure. Regional variations in chemical characteristics of spinel-group...
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Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 453–463.
...Fig. 1 Ternary diagram of three major components of relevance for the garnets of this study; pyrope (pyr)–almandine (alm)–grossular (gro). This sample suite covers a wider compositional range. Roberts Victor pipe samples are labeled SRV and XM, Bobbejaan mine samples are denoted by SBB. ...
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Journal Article
Published: 01 December 2003
South African Journal of Geology (2003) 106 (4): 375–394.
... ). The dykes in these systems are typically thin (maximum 1.3m wide), limited in strike extent (maximum of ~4km for an individual dyke) and have been proven by drilling and geophysics to have a down-dip extent of up to 830m below surface (Bellsbank/Bobbejaan, personal communications A. Rogers, Star Mine, 2002...
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Journal Article
Published: 01 March 2009
South African Journal of Geology (2009) 112 (1): 23–38.
... distribution. Thus the Argyle pink stones and also many of the large Indian alluvial stones belong to this suite (personal communication, Ray Ferraris, Letseng Diamond Mines, 2008). However, the present study focuses on stones from the better documented southern African kimberlite sources. While...
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Journal Article
Published: 01 October 2016
American Mineralogist (2016) 101 (10): 2155–2167.
... ) The geochemistry and origin of xenoliths from the Roberts Victor Mine . Ph.D. thesis , Geochemistry–University of Cape Town . Hatton C.J. Gurney J.J. ( 1979 ) The mantle sample: inclusions in kimberlites and other volcanics . Proceedings of the Second International Kimberlite Conference, American...
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Journal Article
Published: 01 July 2022
Reviews in Mineralogy and Geochemistry (2022) 88 (1): 1–117.
...Figure 12. ( A ) Roberts Victor Mine (South Africa) CROL dike—blow—pipe system. Re-drawn after Wagner (1914) , Gurney and Kirkley (1996) and de Wit et al. (2016) . Bobbejaan Mine (Bellsbank area, South Africa), CROL en-echelon dike system. Adapted and re-drawn from Clement et al. (1973...
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Journal Article
Published: 01 December 2010
The Canadian Mineralogist (2010) 48 (6): 1385–1408.
... kimberlite: Tw: Turkey Wells, Ku: Kuruman, Pre: Premier, representing oldest Group-I kimberlite mine (filled diamond), increasing thickness of solid line represents increasing frequency of Group-I diamond mines with decreasing age. GII: Group-II kimberlite (in southern Africa only). Lamproite: Bo: Bobi, Ar...
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Journal Article
Published: 01 July 2022
Reviews in Mineralogy and Geochemistry (2022) 88 (1): 567–636.
... ( Cullinan Mine ) in South Africa. However, subsequent work revealed unforeseen Ar redistribution problems with the approach used at the time, which has limited wider application of the technique ( Burgess et al. 2004 ). Nevertheless, the 40 Ar/ 39 Ar method has proved useful for detrital diamond provenance...
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Journal Article
Journal: Economic Geology
Published: 01 May 2010
Economic Geology (2010) 105 (3): 689–712.
... in the SCLM have been episodic, can be repeated in the same host rocks at significantly different times, and all investigated orebodies have more than one population of xenocrystic diamonds contributing to run-of-mine production. Evidence is accumulating that the diamond-forming processes are predominantly...
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Published: 01 January 2005
DOI: 10.5382/AV100.07
EISBN: 9781934969519
... effects of stress (plastic deformation) and resorption. Some localities are dominated by diamonds of similar appearance, suggesting derivation predominantly from a single mantle source. In South Africa this is true for the dike systems at the Star mine and Bellsbank/Bobbejaan, where most of the diamonds...
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