 | | Journal (article/letter/editorial) | | Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,⁎, Johann Stiefenhofer...Hole Wells, Somerset, BA5 1DN, United Kingdom De Beers Group Services (Pty) Limited, Mineral Resource... 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada Inc...deposits in central South Africa in the mid nineteenth century, it was at Kimberley where the volcanic...industrial development of southern Africa. Following the discoveries at Kimberley, even more valuable deposits |  | | Journal (article/letter/editorial) | | collection of 107 diamond crystals was cataloged by Count de Bournon in 1815. Another early British collector...assembled a suite of nine crystals for Mlle. Eleanore de Raab in 1791. In the 20th century, Paul Seel (1904–1982)...dynasty (320–298 B.C.) who regulated an active local diamond trade (Maillard, 1980). Legends associated... Figure 4. A diamond crystal in “blue ground” from South Africa, probably from the collection of Gardner and...Hyderabad, and the only modern producing diamond mine in India exploits the Majhgawan lamproite pipe near |  | WHITE, J. L., SPARKS, R. S. J., BAILEY, K., BARNETT, W. P., FIELD, M., WINDSOR, L. (2012) KIMBERLITE SILLS AND DYKES ASSOCIATED WITH THE WESSELTON KIMBERLITE PIPE, KIMBERLEY, SOUTH AFRICA. South African Journal of Geology, 115 (1) 1-32 doi:10.2113/gssajg.115.1.1 | Journal (article/letter/editorial) | | ASSOCIATED WITH THE WESSELTON KIMBERLITE PIPE, KIMBERLEY, SOUTH AFRICA J.L. WHITE, R.S.J. SPARKS, K. BAILEY Department...seroster99@hotmail.com © 2012 March Geological Society of South Africa ABSTRACT Field relations, petrography and bulk...complex exposed in water tunnels at Wesselton Mine, Kimberley. The sill complex, together with associated...macrocrystic kimberlite containing entrained harzburgite microxenoliths, olivine macrocrysts and strongly...associated with the Wesselton kimberlite pipe, Kimberley, South Africa. This study investigates their intrusion |  | (Fanus) Viljoen, K.S., Dobbe, René, Smit, Braam, Thomassot, Emilie, Cartigny, Pierre (2004) Petrology and geochemistry of a diamondiferous lherzolite from the Premier diamond mine, South Africa. Lithos, 77 (1) 539-552 doi:10.1016/j.lithos.2004.03.023 | Journal (article/letter/editorial) | | diamondiferous lherzolite from the Premier diamond mine, South Africa K.S. (Fanus) Viljoen a,*, René Dobbe a,...GeoScience Centre, De Beers Consolidated Mines Limited, P.O. Box 82232, Southdale 2135, South Africa Laboratoire...Laboratoire de Géochimie des Isotopes Stables, UMR CNRS 7047, Institut de Physique du Globe and Université de...de Paris 7, 2 Place Jussieu, T54-64 E1, 75251 Paris, Cedex 05, France Received 27 June 2003; accepted...peridotite xenolith from the Premier diamond mine in South Africa. The xenolith is altered with pervasive |  | | Journal (article/letter/editorial) | | 3b7S02.W;O Ultramafic nodules from the Kimberley pipes, South Africa F. R. BOYD Geophysical Laboratory, Carnegie...Abstract-Garnet lherzolite and harzburgite xenoliths from the Kimberley pipes differ from suites collected...collected in a number of other areas in southern Africa in two important respects: (1) There are no sheared...low-temperature (< 1100°C) peridotites from the Kimberley pipes have textures ranging from coarse to fluidal...mosaic-porphyroclastic. In most nodule suites from southern Africa and elsewhere in the world, these low-temperature |  | | Journal (article/letter/editorial) | | the lithospheric seismic structure of Southern Africa Steven B. Shirey a,*, Jeffrey W. Harris b, Stephen...Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa d Department of Geological Sciences...Laboratoire de Geochemie des Isotopes Stables, Universite de Paris VII, Institut de Physique du Globe de Paris...Park, PA, USA g De Beers GeoScience Centre, PO Box 82232, Southdale, 2135, South Africa Abstract The Archean...beneath the Kaapvaal – Zimbabwe craton of Southern Africa shows F 1% variations in seismic P-wave velocity |  | Viljoen, K. S., Swash, P. M., Otter, M. L., Schulze, D. J., Lawless, P. J. (1992) Diamondiferous garnet harzburgites from the Finsch kimberlite, Northern Cape, South Africa. Contributions to Mineralogy and Petrology, 110 (1) 133-138 doi:10.1007/bf00310887 | Journal (article/letter/editorial) | | harzburgites from the Finsch kimberlite, Northern Cape, South Africa K.S. Viljoen 1, ~, P.M. Swash 1, M.L...2025, South Africa 2 Department of Geochemistry, University of Cape Town, Rondebosch, 7700, South Africa...L5L1C6 4 Geology Department, Finsch Mine, Lime Acres, 8140, South Africa 5 Bernard Price Institute for Geophysical...the Witwatersrand, WITS 2050, Johannesburg, South Africa Received April 26, 1991 / Accepted September...Two xenoliths of garnet harzburgite from the Finsch kimberlite, South Africa, have been found to contain |  | | Journal (article/letter/editorial) | | Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa c Division of Earth Sciences,...Abstract Two decades of diamond research in southern Africa allow the age, average N content and carbon composition...eclogitic sulfide inclusions in diamonds from the Kimberley area kimberlites, Koffiefontein, Orapa and Jwaneng...events with high degrees of melting and early harzburgite formation. The predominance of eclogitic sulfide...and the Limpopo mobile belt known as the Southern Africa Seismic Experiment (SASE; James et al., 2001; James |  | | Journal (article/letter/editorial) | | Phlogopite Zoning Magma ascent Mantle xenoliths Kimberley a b s t r a c t Kimberlite magmas are of economic...phlogopite from the Bultfontein kimberlite (Kimberley, South Africa; i.e. the kimberlite type-locality) and...grains in the Bultfontein kimberlite (Kimberley, South Africa (Fig. 1); i.e. the kimberlite type-locality)...crystals in mantle xenoliths entrained by the Kimberley kimberlites. Phlogopite grains in the Bultfontein...(Giuliani et al., 2014a). 1.1. Phlogopite in the Kimberley kimberlites and entrained mantle xenoliths Limited |  | | Journal (article/letter/editorial) | | Sciences, University of Cape Town, Rondebosch, 7700, Republic of South Africa of Geological Sciences...rarely (approx. 1%) from the asthenosphere. Harzburgite and eclogite are of roughly equal importance...cratons occurs in Archean lithospheric mantle harzburgite, metasomatized by likely subduction-related potassic...lithospheric mantle already identified in the Archean harzburgite diamond event. Mantle-derived SCD commonly shows...P O Box 38668, Pinelands, 7430. Republic of South Africa. 0361-0128/10/3894/689-24 the mantle, as far |  | | Journal (article/letter/editorial) | | thermobarometry of inclusions from De Beers Pool diamonds, Kimberley, South Africa D. Phillips a,*, J.W. Harris...GeoScience Centre, De Beers Consolidated Mines Ltd., P.O. Box 82232, Southdale, 2135, South Africa b Received...and historically important De Beers Pool kimberlites in Kimberley, South Africa, are characterised by harzburgitic...from eclogitic and websteritic parageneses. The De Beers Pool diamonds contain unusually high numbers of...clinopyroxene + rutile. The mineral chemistry of the De Beers Pool inclusions overlaps that of most worldwide |  | | Journal (article/letter/editorial) | | the Precambrian mantle lithosphere of southern Africa Steven B. Shirey Department of Terrestrial Magnetism...Geological Sciences, University of Cape Town Rondebosch 7701, South Africa, e-mail: shr@geology.uct.ac.za...Geological Society of South Africa ABSTRACT Two decades of diamond research in southern Africa allow the age...eclogitic sulfide inclusions in diamonds from the Kimberley area kimberlites, Koffiefontein, Orapa and Jwaneng...events with high degrees of melting and early harzburgite formation. The predominance of eclogitic sulfide |  | Richardson, S.H., Pöml, P.F., Shirey, S.B., Harris, J.W. (2009) Age and origin of peridotitic diamonds from Venetia, Limpopo Belt, Kaapvaal–Zimbabwe craton. Lithos, 112. 785-792 doi:10.1016/j.lithos.2009.05.017 | Journal (article/letter/editorial) | | Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa Institut für Mineralogie, Westfälische...mixing array indicate a N3 Ga continental mantle harzburgite precursor to which a basaltic component was added...xenoliths are open systems subject to metasomatism and local-scale re-equilibration during mantle residence as...Archean Kaapvaal and Zimbabwe cratons of southern Africa (Fig. 1) includes stabilization of the Kaapvaal...amalgamation of the ca. 3.7 Ga Witwatersrand and 3.2 Ga Kimberley blocks via subduction–accretion and continental-collision |  | | Report (chapter) | | KOTA2 1 De Beers Group Exploration, 77 Crownwood Road, Theta Extension 4, Johannesburg, 2013, South Africa...Africa 2 De Beers India Exploration, 36/A, Peenya Industrial Area, IInd Phase, Bangalore 560058, India *Corresponding...erosion of kimberlites of the Wajrakurur cluster. De Beers’ India’s exploration efforts have resulted in...known near Banganapalle village in the Kurnool district, Andhra Pradesh, India (Fig. 1). The Banganapalle...locations of diamond workings are also shown. local evidence of tidal action, with hummocky cross-stratification |  | | Journal (article/letter/editorial) | | inclusion-bearing diamonds from the mines of South Africa and Botswana was begun by Gurney and Harris...diamonds is not known. In early work (1973–1985) run-of-mine diamonds in the sieve class −6 + 5 (1.83 mm aperture...the −6 + 5 sieve class) in run-of-mine productions from South Africa and Botswana are listed in Table...comparison of two studies (1975 and 1985) for the Finsch Mine shows a sevenfold increase in the abundance of inclusionbearing...never quantified for such mines as Roberts Victor (South T. Stachel, J.W. Harris / Ore Geology Reviews |  | | Journal (article/letter/editorial) | | Kaapvaal block, where the classical mines in the Kimberley region are located. The most striking difference...GeoScience Centre, De Beers Consolidated Mines, PO Box 82232, 2135 Southdale, South Africa P. McDade Department...Examples are the Premier and De Beers Mine kimberlites in South Africa (Gurney 1984; Griffin et al. 2003)...belt (dark grey) of the Kalahari Craton (Southern Africa). The dashed line gives the outermost boundary...above anomalously slow lithospheric mantle. The De Beers Pool kimberlites located in the southern part |  | | Book | | with whose research groups at the universities of Cape Town and Chicago I have had long and fruitful collaboration...southern Africa has been carried out with the cooperation and assistance of the geologists of De Beers Consolidated...7.3 2.8 2.9 Africa . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Africa . . . . . . .... . . . . Central Africa. . . . . . . . . . . . . . . . . . . . . . . East Africa. . . . . . . . . .... . . . . . . . . . . . . . . . Southern Africa . . . . . . . . . . . . . . . . . . . . . U.S.S.R. . |  | | Journal (article/letter/editorial) | | reflecting percolation of CHO-fluids through harzburgite under sub-solidus conditions. A second group...al., 1979; Monastery, Moore and Gurney, 1989; De Beers Pool, Phillips and Harris, 1995; Letseng, McDade...in particular the forsterite rich olivines from De Beers Pool (Wilding et al., 1994; Phillips and J.W...composition. If this spinel had formed in a garnet harzburgite source, then it indicates unusually high pressure...heterogeneous mantle sources characterized by high harzburgite/lherzolite and Mg/Fe ratios, and this inclusion |  | | Journal (article/letter/editorial) | | Department of Geochemistry University of Cape Town, Republic of South Africa arro R. V. DnNcurrq2 Anglo-American...ResearchLaboratory Crown Mines, Johannesburg, Republic of South Africa Abstract Two new opaquemineralsare describedfrom...Presentaddress: Stockdale Prospectint-Ltd., 60 Wiison Street, South yarra, Victoria 3141,Australia. 0003-004x/83/0505-M94$02...Hageerty (1975) from the De Beers kimberlite in the Republic of South Africa (RSA) and the mineral has...heavy mineral concentrates from the Jagersfontein mine, the Kolonkwanen kimberlite, and in one veined peridotite |  | | Book | | more identified with diamonds than the South African-based De Beers, the operators of the infamous diamond...world’s rough diamonds flowed into De Beers’s hands. A strike in Northern Canada could hardly seem to trouble...prospectors and, above all, of the shadowy hand of De diamonds Beers for whom are forever. £15.99 GBP county...their office in Patos de Minas, eighty miles west of the garimpo on the Abaete. Patos de Minas is a city of...based in Coromandel, eighty miles west of Patos de Minas. The call to Giglio also brought in Stephen |  | | Journal (article/letter/editorial) | | microinclusion-bearing diamonds from the Group I De Beers Pool kimberlites, South Africa, using FTIR, EPMA and LA-ICP-MS...because, elevated thermal conditions prevailed in the South African lithosphere during and following the Karoo...touching inclusion pairs in diamonds from the De Beers Pool kimberlites, which represent the mantle ambient...southwestern part of the Kaapvaal Craton in South Africa has been studied intensively. Mantle derived...subducting slabs during and after amalgamation of the Kimberley and Witwatersrand blocks, at ca. 2.9 Ga (e.g. |  | | Journal (article/letter/editorial) | | sequence and magma evolution of the De Beers dyke (Kimberley, South Africa) Ashton Soltys 1 & Andrea Giuliani...the De Beers dyke, a contemporaneous, composite intrusion bordering the De Beers pipe (Kimberley, South...South Africa). Petrographic features and mineral compositions indicate the following stages in the evolution...mineral compositions of different units within the De Beers dyke are indistinguishable from one another, indicating...root zone intrusions of the main Kimberley pipes (i.e., Wesselton, De Beers, Bultfontein). However, the composition |  | | Journal (article/letter/editorial) | | SPINEL MACROCRYSTS FROM KIMBERLITES IN SOUTHERN AFRICA DANIEL J. SCHULZE§ Department of Geology, University...single-crystal macrocrysts in kimberlites from southern Africa (approximately 1500 grains from 20 kimberlites...from a variety of mantle xenoliths from southern Africa and North America (approximately 150 xenoliths)...Unusually Fe- and Ni-rich macrocrysts unique to the Lace mine are from Fe-rich orthopyroxene-bearing peridotites...kimberlite, chromian spinel, magnesiochromite, southern Africa. SOMMAIRE Je présente ici une comparaison, en |  | | Journal (article/letter/editorial) | | TRACE ELEMENTS IN KIMBERLITES FROM THE KIMBERLEY AREA (SOUTH AFRICA) Y. M U R A M A T S U and K.H. W E D...trace elements in kimberlites from the Kimberley area (South Africa). Chem. Geol., 51: 289--301. New data...phlogopite garnet harzburgite xenolith and 1 eclogite xenolith from the larger Kimberley area are used to...Ce, Sr, Rb in kimberlites relative to garnet harzburgite has been modelled with the distribution coefficients...phlogopite) of metasomatically altered garnet harzburgite can have contributed the major proportion of |  | | Journal (article/letter/editorial) | | Padova, Padova, Italy 2 De Beers Exploration, Johannesburg, South Africa Corresponding author. of...diamond geobarometry (Cullinan, Kimberley and Voorspoed, South Africa) with those of mantle xenocrysts...conditions may represent old mantle thermal regimes or local thermal perturbations related to infiltration of...most sought-after minerals, with a global annual mine production of ⁓150 Mct (gem and industrial diamonds;...difficult to assess possible heterogeneities in the local distributions of diamonds, differences between localities |
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