 | 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) | | garnet harzburgites from the Finsch kimberlite, Northern Cape, South Africa K.S. Viljoen 1, ~, P.M. Swash...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...the Witwatersrand, WITS 2050, Johannesburg, South Africa Received April 26, 1991 / Accepted September...xenoliths of garnet harzburgite from the Finsch kimberlite, South Africa, have been found to contain diamond |  | | Journal (article/letter/editorial) | | t e / o r e g e o r ev Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field...Southdale, 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada...Available online 22 April 2008 Keywords: Diamond Kimberlite Diatreme Pipe Dyke Mantle-xenolith Diamond-inclusion...discovery of diamonds in river deposits in central South Africa in the mid nineteenth century, it was at Kimberley...recognized. These volcanic rocks, that were named “kimberlite”, were to become the corner stone of the economic |  | | Journal (article/letter/editorial) | | 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...stream beds, possibly very far from the primary kimberlite pipes. However, some also were probably found...(Maillard, 1980); these were probably not mines in kimberlite but deep diggings in diamond-bearing conglomerates...Hyderabad, and the only modern producing diamond mine in India exploits the Majhgawan lamproite pipe near |  | | Book | | E) South African Diamond Occurrences 1. Large Kimberlite Mines 1.1 Venetia 1.2 Premier 1.3 Finsch 1.4...Koffiefontein 2. Smaller mineralised kimberlites in South Africa 2.1 The Oaks 2.2 The Zebediela Kimberlites 2...relative production contributions in South Africa were, primary (kimberlite) 8.63 million carats (89% of total)...Premier mine. The proportion of gems in the West Coast marine deposits is over 98%. The MIBA mine in the...the Congo and the Argyle mine in Australia have an average gem content of only 5%. The dispersal of diamonds |  | | Journal (article/letter/editorial) | | DIAMONDS AND MANTLE-DERIVED XENOLITHS FROM SOUTHERN AFRICA J.D. KRAMERS I Bernard Price Institute of Geophysical...University of" the Witwatersrand, Johannesburg, 2001 {South Africa/ Received April 6, 1978 Revised version received...Premier Mine (Transvaal), the Finsch Mine (northern Cape Province) and the Kimberley mines (northern Cape...the host kimberlite. Model Pb ages for the sulphide inclusions in the diamonds from Finsch and Kimberley... Samples were eclogites from the Roberts Victor Mine (Orange Free State), peridotites from the Matsoku |  | | Journal (article/letter/editorial) | | Kaapvaal craton, with special reference to the Lime Acres limestone deposit W. Altermann 1 and J.McD. Wotherspoon...Miinchen, Germany 2 PPC Lime Limited, Private Bag, 8410 Lime Acres, South Africa Received: 8 July 1994/Accepted:...deposits of South Africa are located. The deposit at Lime Acres and mining operations of the P P C Lime Ltd....early Proterozoic, the Kaapvaal craton of southern Africa hosted three major sub-basins, in which clastic...Province of South Africa, the Griqualand West basin in the northern Cape Province of South Africa, and the |  | (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,...Mines Limited, P.O. Box 82232, Southdale 2135, South Africa Laboratoire de Géochimie des Isotopes Stables...peridotite xenolith from the Premier diamond mine in South Africa. The xenolith is altered with pervasive...reserved. Keywords: Peridotite; Lherzolite; Diamond; Kimberlite; Lithosphere; Infrared 1. Introduction This...diamondiferous peridotite from the Premier diamond mine. Such xenoliths are surprisingly rare on the Kaapvaal |  | | Journal (article/letter/editorial) | | extant at the time of emplacement of the host kimberlite or lamproite. Some inclusions record thermal...celui qui existait lors de la mise en place de la kimberlite ou la lamproïte hôte, voire même plus froid que...diamond from the classic kimberlite fields of the Kaapvaal (southern Africa) and Siberian cratons (Figs...and concentrates of clinopyroxene from the same kimberlite calculated using the same method. Ruled fields...higher pressures. Dok: Dokolwayo; Mot: Mothae; Fin: Finsch; Jag: Jagersfontein; Mon: Monastery; Unc: uncertain |  | | Journal (article/letter/editorial) | | variations in diamonds from Finsch and Premier kimberlite, South Africa PETER DEINES Department of Geosciences...Geochemistry Department, University of Cape Town, Rondehosch 7700. South Africa and J. W. HARRIS Department...inclusion-containing diamonds from the Premier kimberlite, South Africa, 93 inclusion-containing diamonds and...diamond-bearing peridotite xenoliths from the Finsch kimberlite, South Africa was measured. The data suggest a relationship...inclusion minerals in diamonds from the Finsch and Premier kimberlite. Fragments of the diamonds from which |  | | Journal (article/letter/editorial) | | mantle: A study of xenoliths from the Finsch mine, South Africa Marina Lazarov ⁎, Alan B. Woodland, Gerhard...total of 28 peridotite xenoliths from the Finsch mine, South Africa, have been studied to assess the geotherm...physical conditions of the mantle at the time of kimberlite eruption, 118 Ma ago. Pressures and temperatures...for a given pressure. This reflects heating and local perturbation of the thermal gradient of these mantle...mantle regions. The ƒO2 values of 15 samples from Finsch range from FMQ − 2.5 to FMQ − 4.7. There is a steady |  | | Book | | stationery while vacationing on the Natal Coast of South Africa. Wilson uses it as a symbol of the Ivory Coast...ETERNITY A diamond is rarely found embedded in kimberlite rock. This picture at right suggests a genetic...blood, my father (a distinguished editor ol the Cape Times) having been one ol lour sons ol a sullragan...the Ancient Past . 357 Part IV: The Magic of Kimberlite . 379 Part V: Genesis. 413 Index . 449 i\ ...Plate). 91 Cecil John Rhodes . 94 Diamond in kimberlite (Color Plate). 95 Dr Edna Plumstead . 97 Reconstruction |  | 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...Complex a b s t r a c t The 520 Ma old Venetia kimberlite cluster is located in the Central Zone of the...and local-scale re-equilibration during mantle residence as well as alteration during kimberlite eruption...Archean Kaapvaal and Zimbabwe cratons of southern Africa (Fig. 1) includes stabilization of the Kaapvaal...cratons and intervening Limpopo Belt of southern Africa (after Holzer et al., 1999; Zeh et al., 2007) showing |  | | Journal (article/letter/editorial) | | Possible origins of c -damage in diamonds from kimberlite and alluvial sources E. R. VANCE, 1 J. W. H A...localities are caused by o-particle irradiation after kimberlite injection and subsequent cooling. The natural...2o ppm by weight of equivalent uranium, after kimberlite injection and solidification. Such considerations...concentrations in the Finsch kimberlite diatreme and the Bellsbank fissure kimberlite are considerably greater...in the Premier mine, though radioelement segregation could produce the required local concentrations |  | | Journal (article/letter/editorial) | | Geological Sciences, University of Cape Town, Rondebosch 7700, South Africa Department of Earth, Atmospheric...and Proterozoic lithospheric terranes in southern Africa during the Mesozoic was evaluated by thermobarometry...day distribution of surface heat flow in southern Africa is related to this dynamic event and is not a direct...cratons, of which the Kaapvaal craton of southern Africa is a well-studied example (De Wit et al., 1992)...Pollack 1993). In the regional case of southern Africa, the difference is accentuated to the extent that |  | | Book (volume) | | AmericanGeophysicalUnion Washington,D.C. 20009 1979 Kimberlite Conference Preface Since the first edition...was published in 1979, the Third International Kimberlite Conference was held in Clermont-Ferrand in 1982...concerning rocks now misleadingly referred to as Kimberlite will be removea. Diamonds received attention...still there persists the belief that diamonds an• kimberlite are genetically related. And this in spite of...one can separate out the essential minerals of kimberlite. This comment is pertinent to isotopic studies |  | | Journal (article/letter/editorial) | | Sciences, University of Cape Town, Rondebosch, 7700, Republic of South Africa of Geological Sciences...diamond-unfriendly processes, including lamproite and kimberlite generation, are also active and may have a substantial...rapidly, in explosively emplaced volatile-rich kimberlite, lamproite, or related magmas, or more slowly...P O Box 38668, Pinelands, 7430. Republic of South Africa. 0361-0128/10/3894/689-24 the mantle, as far...probably all diamonds are xenocryst minerals in the kimberlite and lamproite intrusions which are the crustal |  | | Journal (article/letter/editorial) | | group 2 ultrapotassie kimberlites from Finseh Mine, South Africa K.J. F r a s e r a,b a n d C.J. H a w k e...group 2 ultrapotassic kimberlites from Finsch Mine, South Africa. In: A. Peccerillo and S. Foley (Editors)...kimberlites from a single pipe, at the Finsch Mine, South Africa. These are Group 2 kimberlites characterised...entrainment of 50-60% mantle peridotite. Thus, the Finsch kimberlites are interpreted as mixtures of a melt...principal source of incompatible elemeats in the kimberlite magma, the enriched Nd, Sr and Pb isotope ratios |  | | Journal (article/letter/editorial) | | Evolution of the South African mantle—a case study of garnet peridotites from the Finsch diamond mine (Kaapvaal...mineral analyses of Finsch mantle peridotites indicate a complex history of the South African sub-continental...cratonization of the Kaapvaal craton underneath Finsch occurred at ~2.6 Ga. The data of this study indicate...enrichment processes during that early history of Finsch SCLM. Calculated degrees of partial melting using...Hf concentrations and subchondritic Lu/Hf, many Finsch peridotites were metasomatically overprinted between |  | | 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...GeoScience Centre, PO Box 82232, Southdale, 2135, South Africa Abstract The Archean lithospheric mantle beneath...beneath the Kaapvaal – Zimbabwe craton of Southern Africa shows F 1% variations in seismic P-wave velocity...diamond compositions for the above kimberlites, Finsch, Jagersfontein, Roberts Victor, Premier, Venetia |  | | Journal (article/letter/editorial) | | Diamond-Bearing Peridotite Xenoliths from the Finsch Kimberlite, South Africa S.R. Shee l, j.j. Gurney2, and D.N...Geochemistry Department, University of Cape Town, Rondebosch 7700, South Africa 3 Anglo American Research Laboratories...Crown Mines 2025, South Africa Abstract. Two diamond bearing xenoliths found at Finsch Mine are coarse garnet...similar to the dominant mantle xenoliths in that kimberlite. A total of 46 diamonds weighing 0.053 carats...less corroded than diamonds recovered from the kimberlite. Geothermobarometric calculations indicate that |  | | Journal (article/letter/editorial) | | diamonds and their inclusions from the Finsch kimberlite pipe, South Africa C.M. Appleyard *, K.S. Viljoen,...GeoScience Centre, P.O. Box 82232, Southdale 2135, South Africa Received 21 June 2003; accepted 12 December...studies of diamonds from Finsch have shown that eclogitic inclusions are rare at Finsch and that the eclogitic...infrared characteristics suggest that the Finsch kimberlite sampled either more than one mantle source...case at Orapa (Gurney et al., 1984). The Finsch kimberlite is of the Group II variety (Smith, 1983) with |  | Krebs, M.Y., Pearson, D.G., Stachel, T., Laiginhas, F., Woodland, S., Chinn, I., Kong, J. (2019) A common parentage-low abundance trace element data of gem diamonds reveals similar fluids to fibrous diamonds. Lithos, 324. 356-370 doi:10.1016/j.lithos.2018.11.025 | Journal (article/letter/editorial) | | University, U.K 4 De Beers Group Exploration, South Africa 5 De Beers Canada * Corresponding author...data from high-purity gem diamonds from the Victor Mine, Ontario, Canada as well as near- gem diamonds from...and eclogite xenoliths from the Finsch and Newlands mines, South Africa, acquired using an off- line laser...but also in gem diamonds. Two diamonds from two Finsch harzburgite xenoliths show trace element patterns...Diamond; Laser ablation; diamond HDFs; Victor diamond mine ACCEPTED MANUSCRIPT 1. Introduction Diamond crystallizes |  | | Book | | discovery of these rocks in the Orange Free State of South Africa. The name is not a new one: In 1928, Percy Wagner...kimberlites and reviews some of the advances in kimberlite petrology since 1986. The work is a critical...although current hypotheses for the genesis of kimberlite and orangeite are critically reviewed. These...Orangeites 1.8. Occurrences of Orangeites . 1. 8.1. Finsch . . . . . . . . 1.8.2. Barkly West Region. 1.8...3. Boshof District . . . 1.8.3.1. Roberts Victor 1.8.3.2. New Elands 1.8.4. Winburg District ... 1.8.5 |  | HANSON, E.K., MOORE, J.M., BORDY, E.M., MARSH, J.S., HOWARTH, G., ROBEY, J.V.A. (2009) CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES. South African Journal of Geology, 112 (2) 125-140 doi:10.2113/gssajg.112.2.125 | Journal (article/letter/editorial) | | EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES E.K. HANSON...Rhodes University, P.O. Box 94, Grahamstown, South Africa email: emilykhanson@gmail.com; j.moore@ru.ac...Kimberley, South Africa email: jock.robey@debeersgroup.com © 2009 June Geological Society of South Africa ABSTRACT...Group II and fourteen Group I kimberlite diatremes in central South Africa were examined for upper crustal...Supergroup in the main Karoo basin at times of kimberlite eruption, the Cretaceous erosional history of |  | | Journal (article/letter/editorial) | | Mineral inclusions in diamonds from the River Ranch kimberlite, Zimbabwe Received: 11 January 1995 / Accepted:...demonstrates a limited overlap with River Ranch kimberlite macrocrysts: the DI garnets are more Ca-undersaturated...calculations for Roberts Victor, but hotter than for the Finsch, Kimberley, Koefontein and Premier Mines. This...J.J. Gurney Geological Department, University of Cape Town, 7700, Rondebosch, RSA L.R.M. Daniels Nomathata...economic kimberlites. Mineral chemistry of the LMB kimberlite indicator minerals suggests higher diamond potential |
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