 | | Journal (article/letter/editorial) | | Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,⁎, Johann Stiefenhofer...Southdale, 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada...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...deposits were discovered in South Africa and Botswana in particular, but also in Lesotho, Swaziland and Zimbabwe |  | | 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 |  | | Book | | not attempted to describe diamond prospecting and mining and, although I have attempted to give some of...with whose research groups at the universities of Cape Town and Chicago I have had long and fruitful collaboration...collaboration. Much of my fieldwork in southern Africa has been carried out with the cooperation and assistance...7.3 2.8 2.9 Africa . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Africa . . . . . . .... . . . . Central Africa. . . . . . . . . . . . . . . . . . . . . . . East Africa. . . . . . . . . . |  | | Journal (article/letter/editorial) | | something about the geology, cultural contexts and mining histories of the localities represented. The crystal...collection, a brief historical overview of diamond mining and a summary of the exotic geological “story”...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...account of about 120 B.C. speaks tantalizingly of underground diamond mines with deep galleries (Maillard, |  | | Journal (article/letter/editorial) | | Phlogopite Zoning Magma ascent Mantle xenoliths Kimberley a b s t r a c t Kimberlite magmas are of economic...data for phlogopite from the Bultfontein kimberlite (Kimberley, South Africa; i.e. the kimberlite type-locality)...microcrysts (between ~0.1 and 0.3 mm) in the Bultfontein kimberlite display concentric compositional zoning...and groundmass grains in the Bultfontein kimberlite (Kimberley, South Africa (Fig. 1); i.e. the kimberlite...xenoliths entrained by the Kimberley kimberlites. Phlogopite grains in the Bultfontein kimberlite exhibit multiple |  | | Journal (article/letter/editorial) | | of Geochemistry, University of Cape Town, Rondebosch 7700 (South Africa) Received February 20, 1985; revised...mantle beneath the northern Lesotho margin of the Archaean craton in southern Africa are inferred to have...garnet lherzolite xenoliths from beneath the Kimberley area in the craton interior display internal isotopic...similar Cretaceous age, Bultfontein (Kimberley district) and Thaba Putsoa (northern Lesotho), was undertaken...orthopyroxene compositions indicate haba Putsoa Bultfontein (Kimberley cluster) 0 i . . . . 500 i km Fig |  | | Journal (article/letter/editorial) | | magma evolution of the De Beers dyke (Kimberley, South Africa) Ashton Soltys 1 & Andrea Giuliani 1,2...intrusion bordering the De Beers pipe (Kimberley, South Africa). Petrographic features and mineral compositions...intrusions of the main Kimberley pipes (i.e., Wesselton, De Beers, Bultfontein). However, the composition...distinct from those in ‘evolved’ intrusions of the Kimberley cluster (e.g., Benfontein, Wesselton water tunnel... Crystallisation sequence . Melt evolution . Kimberley Introduction Editorial handling: B. Kjarsgaard |  | | Journal (article/letter/editorial) | | Abstract Kimberlite magmas from the Kimberley area of South Africa have sampled two main types of phlogopite-rich...and metasomatised, the upper mantle beneath the Kimberley area as indicated by the trace element characteristics...Geological Sciences, University of Cape Town, 7700 Rondebosch, South Africa Editorial responsibility: T.L...xenoliths have been known from the kimberlites of Kimberley for at least 80 years (e.g. Wagner 1914), it was...(1936) referred to phlogopite-rich xenoliths in South African kimberlites as ‘‘glimmerites’’. However |  | | 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 |  | Bell, D. R., Grégoire, M., Grove, T. L., Chatterjee, N., Carlson, R. W., Buseck, P. R. (2005) Silica and volatile-element metasomatism of Archean mantle: a xenolith-scale example from the Kaapvaal Craton. Contributions to Mineralogy and Petrology, 150 (3) 251-267 doi:10.1007/s00410-005-0673-8 | Journal (article/letter/editorial) | | in a composite garnet harzburgite mantle xenolith from Kimberley, South Africa, suggests metasomatism...fluid. The fluid reacted with olivine-rich garnet harzburgite, converting olivine to orthopyroxene, forming...Ga subduction and continental collision in the Kimberley region. The veined sample reflects the silicic...of a spectrum of compositions generated in the Kimberley mantle lithosphere by the metasomatizing effects...particular those from the Kaapvaal craton of southern Africa, contain unusually high Si contents (manifested |  | | Book (volume) | | rise and development of the diamond mines of South Africa, from an historical, economic and technical...days on the diamond fields when the mines in the Kimberley and Jagersfontein areas were the only diamond...information of a mining nature, which included, besides the data on under ground and surface mining operations...crystals with the object, if possible, of deter mining the conditions under which the diamond crystal...collect during my many visits to all parts of South Africa where kimberlite deposits occurred and the filing |  | | 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...from the De Beers kimberlite in the Republic of South Africa (RSA) and the mineral has since been recognized...accessory mineral in veined peridotites from nearby Bultfontein. Mathiasite, the K member has thus far been recognized |  | | 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 |  | Hopp, Jens, Trieloff, M., Brey, G.P., Woodland, A.B., Simon, N.S.C., Wijbrans, J.R., Siebel, W., Reitter, E. (2008) 40Ar/39Ar-ages of phlogopite in mantle xenoliths from South African kimberlites: Evidence for metasomatic mantle impregnation during the Kibaran orogenic cycle. Lithos, 106 (3) 351-364 doi:10.1016/j.lithos.2008.09.001 | Journal (article/letter/editorial) | | Ar/39Ar-ages of phlogopite in mantle xenoliths from South African kimberlites: Evidence for metasomatic mantle...lithosphere Ar–Ar dating Metasomatism Southern Africa a b s t r a c t We applied the 40Ar/39Ar dating...(dominantly garnet bearing) from the mines of Bultfontein (South Africa), Letseng-laTerae and Liqhobong (Lesotho)...meaningful and assigned to metasomatism of the local cratonic mantle during the advent of Kibaran orogenesis...The cratonic lithospheric mantle below southern Africa may have been frequently influenced by different |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | Giuliani, A., Kamenetsky, V.S., Kendrick, M.A., Phillips, D., Wyatt, B.A., Maas, R. (2013) Oxide, sulphide and carbonate minerals in a mantle polymict breccia: Metasomatism by proto-kimberlite magmas, and relationship to the kimberlite megacrystic suite. Chemical Geology, 353. 4-18 doi:10.1016/j.chemgeo.2012.09.025 | Journal (article/letter/editorial) | | polymict breccia (DU-1) from the Bultfontein Dumps (Kimberley, South Africa). Xenolith DU-1 contains heterogeneous...of ilmenite-rich breccia surrounded by spinel harzburgite wall rock. The breccia domains also host resorbed...isotope values (initial εHf =2.1–3.0) in the range of South African Group I kimberlites and associated megacrysts...provenance from diverse lithologies, including harzburgite, lherzolite, eclogite, and minerals of the megacryst...xenolith (DU-1) collected from the Bultfontein Dumps (Kimberley, South Africa). Textural relationships, mineral |  | Jaques, A. L., O'Neill, H. St. C., Smith, C. B., Moon, J., Chappell, B. W. (1990) Diamondiferous peridotite xenoliths from the Argyle (AK1) lamproite pipe, Western Australia. Contributions to Mineralogy and Petrology, 104 (3) 255-276 doi:10.1007/bf00321484 | Journal (article/letter/editorial) | | coarse garnet lherzolites but also include garnet harzburgite, chromite - garnet peridotite, a garnet wehrlite...is mostly depleted lherzolite rather than the harzburgite commonly found beneath Archaean cratons. Nevertheless...reduced, refractory peridotite (therzolite- harzburgite) in contrast to the predominant strongly 13C_depleted...(McCallum and Eggler /976), 2 from Finsch in South Africa (Shee et al. 1982) and the remainder from Yakutia...s h t o n Joint Venture in 1979 (Atkinson et al. 1984a, b), is located in the east Kimberley region, Western |  | | Journal (article/letter/editorial) | | veins in a harzburgite xenolith from kimberlite have imposed Ca-metasomatism on the harzburgite wall rock...in relatively small geographical areas such as northern Tanzania, xenoliths from dierent eruptive sites...xenoliths from kimberlite, specimens from Kimberley, South Africa have formed the basis of several metasomatism...chemistry of a veined and metasomatised harzburgite xenolith from Kimberley which provides evidence for further...from the kimberlite waste dump at Boshof Road, Kimberley. It is an angular block measuring approximately |  | Peslier, A.H., Woodland, A.B., Bell, D.R., Lazarov, M., Lapen, T.J. (2012) Metasomatic control of water contents in the Kaapvaal cratonic mantle. Geochimica et Cosmochimica Acta, 97. 213-246 doi:10.1016/j.gca.2012.08.028 | Journal (article/letter/editorial) | | the Kaapvaal craton from Finsch, Kimberley, Jagersfontein (South Africa), Letseng-La-Terae, and Liqhobong...siliceous fluids or melts metasomatized Liqhobong and Kimberley peridotites, producing high water contents in...content of olivines with decreasing pressure at Finsch Mine. H2O/Ce ratios of melts in equilibrium with Kaapvaal...the water contents may date from the Archean at Kimberley and from the Proterozoic at Jagersfontein. Combined...and weathering Fig. 1. Simplified map of southern Africa showing the location of the Kaapvaal craton and |  | | Journal (article/letter/editorial) | | upper mantle beneath the Kaapvaal craton, Southern Africa A.B. Woodland , M. Koch Mineralogisches Institut...the Kaapvaal craton in South Africa (Kimberley, Jagersfontein, Frank Smith Mine, Monastery) and Lesotho...coverage from V80 to 220 km. For the Lesotho and South African xenoliths there is a systematic, but not...attended metasomatism, as recorded in samples from Kimberley. Our results emphasise that the upper mantle cannot...garnet peridotite xenoliths from the Wesselton Mine, South Africa. However, a detailed analysis of the variation |  | | Journal (article/letter/editorial) | | Richterite Bearing Peridotite Xenoliths from South Africa Ken-ichiro Aoki Institute of Mineralogy,Petrologyand... %) are rarely found in kimberlite from the Bultfontein Floors. Chemically, these rocks are similar in...granular type garnet peridotite xenoliths from South Africa and Lesotho, except for an abnormally high content...peridotites at a depth from 170 to 100 km suffered local introduction of a potash-rich fluid, and garnet...identified in four peridotites (Erlank, 1973) from South Africa and Lesotho. Recent highpressure experiments |  | | Journal (article/letter/editorial) | | of some peridotites from the Kaapvaal craton (South Africa) Received: 27 October 2005 / Accepted: 15 January...in peridotite xenoliths from Kaapvaal craton (South Africa) provided compelling evidence for the occurrence...high-grade Archean Terranes: the Western Terrane, the South-Eastern Terrane, the Central Terrane and the Pietermaritz...kimberlite pipes of the Kimberley area (De Beers Mine; Bultfontein, Kimberley, South Africa) and Jagersfontein...Jagersfontein (Fig. 1). In the South-Eastern Terrane, samples come from several diamondiferous kimberlite localities |  | Fitzpayne, Angus, Giuliani, Andrea, Harris, Chris, Thomassot, Emilie, Cheng, Chen, Hergt, Janet (2019) Evidence for subduction-related signatures in the southern African lithosphere from the N-O isotopic composition of metasomatic mantle minerals. Geochimica et Cosmochimica Acta, 266. 237-257 doi:10.1016/j.gca.2019.02.037 | Journal (article/letter/editorial) | | 2109 New South Wales, Australia 3 Department of Geological Sciences, University of Cape Town, Rondebosch...Rondebosch 7700, South Africa 4 Centre de Recherches Pétrographiques et Géochimiques-CNRS, Université...iopside) rocks – from the Bultfontein kimberlite (Kimberley, South Africa), which show varying degrees...crustal component occurred in the source of the Kimberley kimberlites, or was assimilated during interaction...cratonic regions such as the Kaapvaal in southern Africa indicates a complex evolutionary history for the |  | | 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 |  | Fitzpayne, Angus, Giuliani, Andrea, Hergt, Janet, Phillips, David, Janney, Philip (2018) New geochemical constraints on the origins of MARID and PIC rocks: Implications for mantle metasomatism and mantle-derived potassic magmatism. Lithos, 318. 478-493 doi:10.1016/j.lithos.2018.08.036 | Journal (article/letter/editorial) | | Ryde, 2109 New South Wales, Australia Department of Geological Sciences, University of Cape Town, Rondebosch...Rondebosch 7701, South MA 3 AC CE Corresponding author. PT E * D Africa ACCEPTED MANUSCRIPT Abstract...MARID and PIC samples from the Kimberley- D Barkly West area in South Africa. Similarities between compositions...PIC xenoliths originate from the Kimberley kimberlites (South Africa), although MARID samples have also...relative abundance of archetypal MARID rocks in the Kimberley kimberlites compared to other localities remains |
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