 | | 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) | | something about the geology, cultural contexts and mining histories of the localities represented. The crystal...characteristic, flattened triangular shapes of “macle” spinel-law twins. Some of the crystal faces are convex...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 |  | | Book (volume) | | THE DIAMOND MINES OF SOUTH AFRICA VOL. I THE DIAMOND MINES OF SOUTH AFRICA WILL] PORTRAIT OF GARDNER...GARDNER F. WILLIAMS. THE DIAMOND MINES OF SOUTH AFRICA BY GARDNER F. WILLIAMS, M.A. GENERAL MANAGER...interesting illustrations. GARDNER KIMBERLEV, SOUTH AFRICA, AUGUST, 1904. 9628 / F. WILLIAMS. Contents...History of Romance of Noted Golconda. in India. Mining The Diamond. Physical Characteristics of the...Bartholomeu Dias A.D. Phoenicians of Sheba. around Africa, 600 B.C. Crosses at Angra Pequena and Algoa Bay |  | | Book | | Phase 5. Sample Treatment D) World Production E) South African Diamond Occurrences 1. Large Kimberlite...Finsch 1.4 Kimberley 1.5 Koffiefontein 2. Smaller mineralised kimberlites in South Africa 2.1 The Oaks... their relative production contributions in South Africa were, primary (kimberlite) 8.63 million carats...suggest approximately 40% for the Kimberley mines and 55% for Premier mine. The proportion of gems in the...deposits is over 98%. The MIBA mine in the Congo and the Argyle mine in Australia have an average gem |  | | Journal (article/letter/editorial) | | 3JH, UK Transactions of the Royal Society of South Africa Publication details, including instructions...information: http://www.tandfonline.com/loi/ttrs20 KIMBERLEY DIAMONDS: ESPECIALLY CLEAVAGE DIAMONDS J. R. Sutton...(1918) KIMBERLEY DIAMONDS: ESPECIALLY CLEAVAGE DIAMONDS, Transactions of the Royal Society of South Africa...[University of Calgary] at 12:34 03 February 2015 KIMBERLEY DIAMONDS: ESPECIALLY CLEAVAG E DIAMONDS. By J...J. R. SUTTON, M.A., Sc.D., F.R.S.S.A. 1. LOCAL CHARACTERISTICS. The difference in character between |  | | 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...(internal zones and subsequently rims), Cr-rich spinel, rutile, and magnesian ilmenite, probably on ascent...ilmenite, and spinel) overlap those from the root zone intrusions of the main Kimberley pipes (i.e., Wesselton...Wesselton, De Beers, Bultfontein). However, the composition of these magmatic phases is distinct from |  | | 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. . . . . . . . . . |  | Giuliani, Andrea, Soltys, Ashton, Phillips, David, Kamenetsky, Vadim S., Maas, Roland, Goemann, Karsten, Woodhead, Jon D., Drysdale, Russell N., Griffin, William L. (2017) The final stages of kimberlite petrogenesis: Petrography, mineral chemistry, melt inclusions and Sr-C-O isotope geochemistry of the Bultfontein kimberlite (Kimberley, South Africa) Chemical Geology, 455. 342-356 doi:10.1016/j.chemgeo.2016.10.011 | Journal (article/letter/editorial) | | isotope geochemistry of the Bultfontein kimberlite (Kimberley, South Africa) Andrea Giuliani, Ashton Soltys...isotope geochemistry of the Bultfontein kimberlite (Kimberley, South Africa), Chemical Geology (2016),...geochemistry of the SC RI PT Bultfontein kimberlite (Kimberley, South Africa) Andrea Giuliani1,2,3*, Ashton...hypabyssal sample (BK) from the Bultfontein kimberlite (Kimberley, South MA Africa). Sample BK consists of...grains of apatite, serpentinised monticellite, spinel, perovskite, phlogopite and ilmenite in a matrix |  | | 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 |  | | Journal (article/letter/editorial) | | 3b7S02.W;O Ultramafic nodules from the Kimberley pipes, South Africa F. R. BOYD Geophysical Laboratory, Carnegie...from the Kimberley pipes differ from suites collected in a number of other areas in southern Africa in two...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...Petrographic and electron microprobe study of the Kimberley peridotites shows that they are depleted in basaltic |  | | 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) | | 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) | | CHROMIAN AND ALUMINOUS SPINEL MACROCRYSTS FROM KIMBERLITES IN SOUTHERN AFRICA DANIEL J. SCHULZE§ Department...of the major- and minor-element compositions of spinel-group minerals that occur as single-crystal macrocrysts...macrocrysts in kimberlites from southern Africa (approximately 1500 grains from 20 kimberlites on the Kaapvaal...from a variety of mantle xenoliths from southern Africa and North America (approximately 150 xenoliths)...leads to the conclusion that most macrocrysts of spinel-group minerals are likely to be xenocrysts from |  | | Journal (article/letter/editorial) | | R*CKWOOD** Division of Geological Sciences, University of Cape Town 12,eceived November 4, 1969 Abstract. Brief...in the kimberlites of Lesotho, Rhodesia, Sauth Africa, and Tanzania. Six new mineral assemblages, which...olivine-orthopyroxene-clinopyroxene-amphibole; garnet-spinel; garnet-clinopyroxene-quartz; garnet-clinopyroxene-high...sanidine-eclogite plus scapolite.amphibole-eclogite, and garnet-spinel plus garnet-corundum rocks form the new groups...lengths for the last-named phase. The spinel in the garnet-spinel rocks is essentially pleonaste but it |  | | 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) | | from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following...some cases, zircon contents of about 25 g/t (Bultfontein, cf. HOLMLS 1936; Rietfontein, A. G. BLOOMER...material studied (especially the zircons from the Kimberley mines) was subangular in shape, with one or a...predominate. Zircons from the Kimberley group of intrusions (i.e., Kimberley, Dutoitspan, De Beers, Wesselton...Wesselton and Bultfontein mines) and Nzega (Tanzania) are greyish, which might be attributed to their high |  | | Journal (article/letter/editorial) | | upper mantle beneath the Kaapvaal craton, Southern Africa A.B. Woodland , M. Koch Mineralogisches Institut...varies with depth, Fe3þ contents in garnet and spinel from peridotite xenoliths were determined by Mo«ssbauer...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...decrease of V3 log units. At shallow depths, where spinel peridotites are stable, vlogfO2 values of VFMQ31 |  | | 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 |  | | Journal (article/letter/editorial) | | Society of South Africa. A prosaic motive for the story can perhaps be furnished from Kimberley experience...between them and things that happen. Now that the mining area is enclosed and there is not very much unwashed...region.” 0. F. Williams, ‘ The Diamond Mines of South Africa,’ p. 122, 1902. t The I‘ leaf of gold ” said...third grows round the contact. If, then, in the mining or winning they should fall apart the third will...is well known, of course, that diamonds have a local individuality, and the fact has a n important bearing |  | | Journal (article/letter/editorial) | | in polymict xenoliths from the Bultfontein kimberlites, South Africa: implication for low bulk-rock oxygen...Polymict mantle xenoliths from the Bultfontein kimberlites, South Africa, contain abundant ilmenites (30%...of Geochemistry, University of Cape Town, Rondebosch 7700, South Africa Editorial responsibility: T.L...homogeneous high-Ti silicate melt. Keywords South Africa á Polymict xenolith á Oxide mineral á Ilmenite...have published analyses of oxide minerals (e.g. spinel, ilmenite and rutile) overgrown with silicate minerals |  | | Journal (article/letter/editorial) | | Cr-rich phases (garnet, clinopyroxene and possibly spinel) could result in later forming megacryst ilmenites...pyroxene-ilmenite xenolith from the Weltevreden mine, which they suggest is also genetically related...ilmenites from the Mayeng Kimberlite Sills, South Africa (adapted from Apter et al. 1984). Solid circles...suite of ilmenite megacrysts from west Africa and South Africa. However, he notes (Haggerty, pers. comm...to be particularly abundant inclusions in the Bultfontein kimberlite. Ilmenite is also present as a metasomatic |  | | Journal (article/letter/editorial) | | 3JH, UK Transactions of the Royal Society of South Africa Publication details, including instructions...DIAMOND, Transactions of the Royal Society of South Africa, 8:1, 125-136, DOI: 10.1080/00359191909519992...SpON'rANEOUs BREAKING. The 40th Article of Religion III Kimberley affirms that light brown smoky-looking diamonds...finds such a diamond-which may have been out of the mine for forty years-c-will at once race off with it...hypothetical contained gases when a diamond is taken from a mine; Crookes favours the idea of decrease of pressure |  | | 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...and kimberlites. Continental alkalic basalts with spinel peridotite xenoliths are generally associated with...similar Cretaceous age, Bultfontein (Kimberley district) and Thaba Putsoa (northern Lesotho), was undertaken |  | | Book (edition) | | The Indian Mines - Current Mining - Mining in Brazil — Diamonds in Africa — The First Diamond — First...First Authenticated Diamond — Mining Rights — The First Big Find — First Diggings — Hope Town — The Diggers’...The ‘Big Hole’ of Kimberley — Present Small Diggings — The Diggers’ Press THE BIG MINING COMPANIES Cecil...Rhodes at Kimberley — Barney Barnato — De Beers Consolidated Mines — The Town of Kimberley — The Wesselton...Oranjemund Founded — Other Discoveries in Africa — Mining in Botswana — Pipes in Lesotho — Diamonds up |  | | Journal (article/letter/editorial) | | from 17 kimberlite localities from SC southern Africa, Canada, Greenland and Russia. These data show...e., orthopyroxene, clinopyroxene, garnet and Cr-spinel) in olivine cores, and evidence of resorption (i...rims host inclusions of groundmass minerals (e.g., spinel, Mg-ilmenite, rutile), which requires a magmatic...rims in each kimberlite locality, cluster (e.g., Kimberley) and, potentially field (e.g., Lac de Gras), form...from a range of local processes, such as variable source composition, olivine and D spinel fractionation |
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