 | | Journal (article/letter/editorial) | | 3JH, UK Transactions of the Royal Society of South Africa Publication details, including instructions...DIAMONDS, Transactions of the Royal Society of South Africa, 7:1, 65-96, DOI: 10.1080/00359191809519546...DIAMONDS. By J. R. SUTTON, M.A., Sc.D., F.R.S.S.A. 1. LOCAL CHARACTERISTICS. The difference in character between...to the expert, between, say, a crystal from Bultfontein and one from Wesselton. One or two opinions from...itself." (G. F. Williams, 'The Diamond Mines of South Africa,' p. 492,1902.) "The collective character of |  | | Journal (article/letter/editorial) | | SPINEL MACROCRYSTS FROM KIMBERLITES IN SOUTHERN AFRICA DANIEL J. SCHULZEĀ§ 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)...with Cr/(Cr + Al) > 0.88 is derived from garnet-free assemblages that have bulk Cr/(Cr + Al) values too...xenocrysts from highly metasomatized assemblages (e.g., zircon-bearing) are uncommon. Unusually Fe- and Ni-rich |  | | Journal (article/letter/editorial) | | Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,ā, Johann Stiefenhofer...Southdale, 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada...discovery of diamonds in river deposits in central South Africa in the mid nineteenth century, it was at Kimberley...economic and industrial development of southern Africa. Following the discoveries at Kimberley, even more...more valuable deposits were discovered in South Africa and Botswana in particular, but also in Lesotho |  | | Journal (article/letter/editorial) | | mantle peridotite SC from the Late Cretaceous Bultfontein kimberlite (Kaapvaal craton) that shows rare...clinopyroxene, sulfides, phlogopite, MA spinel and zircon together with interaction and diffusive exchange...importance of anisotropy and the impact of changing local NU SC concentration gradients during subsolidus...dating techniques on metasomatic phases such as zircon and titanite. The highest precision are U-Pb dates...emplacement at the surface. Some are these U-Pb zircon ages are coeval with the host kimberlite (Kinny |  | | Book | | relevant protective laws and regulations and therefore free for general use. 2132/3130-543210 To my wife,...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. . . . . . . . . .... . . . . . . . . . . . . . . . Southern Africa . . . . . . . . . . . . . . . . . . . . . U.S.S.R. . |  | | Journal (article/letter/editorial) | | Geochemistry, University of Cape Town, Rondebosch 7700 (South Africa) Received February 20, 1985; revised version...Lesotho margin of the Archaean craton in southern Africa are inferred to have been in internal Nd and Sr...kimberlites of similar Cretaceous age, Bultfontein (Kimberley district) and Thaba Putsoa (northern Lesotho)...orthopyroxene compositions indicate haba Putsoa Bultfontein (Kimberley cluster) 0 i . . . . 500 i km...southern Africa (modified after Gurney and Harte [6]) highlighting the location of Bultfontein (28Ā°46'S |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Johannesburg 2001 (South Africa) (Received April 5, 1982; revised and accepted...ages are often discordant (Davis, 1977). However, zircon is a relatively rare mineral in kimberlite and...southern Africa with localities of pipes studied (1 = Kimberley , including De Beers, Bultfontein Wesselton...for whole-rock or for mineral separation, were as free of xenoliths or xenocrysts as possible. Often this...this entailed selecting xenolith- and xenocryst-free fragments from pre-crushed samples to obtain a representative |  | | Journal (article/letter/editorial) | | from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following...Introduction Zircon is an accessory mineral found in most of the kimberlites. Usually, the zircon content...pers. comm.). In some cases, zircon contents of about 25 g/t (Bultfontein, cf. HOLMLS 1936; Rietfontein...zirconium bulk in ldmberlites is represented bound in zircon. Taking an average Zr content of about 200 ppm...Zr in the kimberlite is present in the form of zircon. Ilmenite, which contains 546--1190 ppm Zr (MITcI-mLL |  | | Report (chapter) | | mantle events and diatreme ascent rates in southern Africa and Malaita, Solomon Islands JO-ANNE WARTHO* &...from Kimberley, Monastery and Letseng in southern Africa, and Malaita, in the Solomon Islands, to test whether...Kaapvaal craton: De Beers, Bultfontein, Kamfersdam and Monastery in South Africa, and Letseng in NE Lesotho...from 114 to 150 Ma (Smith 1983). The De Beers, Bultfontein and Kamfersdam kimberlite diatremes are spatially...outside Kimberley, primarily originate from the Bultfontein pipe, but may include some material from the |  | Giuliani, Andrea, Woodhead, Jon D., Phillips, David, Maas, Roland, Davies, Gareth R., Griffin, William L. (2018) Titanates of the lindsleyiteāmathiasite (LIMA) group reveal isotope disequilibrium associated with metasomatism in the mantle beneath Kimberley (South Africa) Earth and Planetary Science Letters, 482. 253-264 doi:10.1016/j.epsl.2017.11.014 | Journal (article/letter/editorial) | | metasomatism in the mantle beneath Kimberley (South Africa) Andrea Giuliani a,b,c,ā , Jon D. Woodhead d...mantle xenoliths from the ā¼84 Ma Bultfontein kimberlite (South Africa). Previous U/Pb dating of the LIMA...been assumed previously. Simple modelling of solid-state diffusion in mantle minerals shows that isotopic...entrained xenoliths from the Kimberley kimberlites (South Africa) lead us to question the basic assumption of...xenoliths from the ā¼84 Ma Bultfontein kimberlite (Kimberley, South Africa). These results are combined |  | Soltys, Ashton, Giuliani, Andrea, Phillips, David, Kamenetsky, Vadim S., Maas, Roland, Woodhead, Jon, Rodemann, Thomas (2016) In-situ assimilation of mantle minerals by kimberlitic magmas ā Direct evidence from a garnet wehrlite xenolith entrained in the Bultfontein kimberlite (Kimberley, South Africa) Lithos, 256. 182-196 doi:10.1016/j.lithos.2016.04.011 | Journal (article/letter/editorial) | | xenolith entrained in the Bultfontein kimberlite (Kimberley, South Africa) Ashton Soltys, Andrea Giuliani...xenolith entrained in the Bultfontein kimberlite (Kimberley, South Africa), LITHOS (2016), doi: 10.1016/j...xenolith entrained in SC RI the Bultfontein kimberlite (Kimberley, South Africa). Ashton Soltys1,*, Andrea...kbar (~140-145 km)] from the Bultfontein kimberlite (Kimberley, South Africa). This vein assemblage is dominated...overlaps those of groundmass calcite from the Bultfontein kimberlite, as well as perovskite from the other |  | | Journal (article/letter/editorial) | | Sciences, Macquarie University, North Ryde, 2109, New South Wales, Australia 3 Centre for Microscopy, Characterisation...to Eocene archetypal kimberlites from southern Africa, Lac de Gras (Canada) and Alto Paranaiba (Brazil)...occur in the source of kimberlites from southern Africa, Lac de Gras and Alto Paranaiba, or that the recycled...kimberlites and related megacrysts from southern Africa revealed elevated 206 Pb/204Pb ratios (Smith...groundmass of two Cretaceous kimberlites from southern Africa (Wesselton and Orapa) has ļ¤18O values consistent |  | | Journal (article/letter/editorial) | | Geochemistry University of Cape Town, Republic of South Africa arro R. V. DnNcurrq2 Anglo-American Corporation...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) | | the Bultfontein Dumps located at Boshof Road, Kimberley. The host lithologies of the Bultfontein kimberlite...felsic gneisses of the Archean basement. The Bultfontein kimberlite consists of a regular-shaped diatreme...Field et al., 2008; Giuliani et al., 2017). The Bultfontein kimberlite consists of a hypabyssal kimberlite...orangeites) emplacement in the Barkly West-Boshof district between 115 and 128 Ma (Smith et al., 1985; Phillips...Rb/Sr age of 84.0 Ā± 0.9 Ma was obtained for the Bultfontein kimberlite from phlogopite in metasomatised mantle |  | 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...similar 87 Sr/86Sr ratios to perovskite in the Bultfontein and the other Kimberley kimberlites, i.e. magmatic |  | Giuliani, Andrea, Phillips, David, Maas, Roland, Woodhead, Jon D., Kendrick, Mark A., Greig, Alan, Armstrong, Richard A., Chew, David, Kamenetsky, Vadim S., Fiorentini, Marco L. (2014) LIMA UāPb ages link lithospheric mantle metasomatism to Karoo magmatism beneath the Kimberley region, South Africa. Earth and Planetary Science Letters, 401. 132-147 doi:10.1016/j.epsl.2014.05.044 | Journal (article/letter/editorial) | | Karoo magmatism beneath the Kimberley region, South Africa Andrea Giuliani a,ā , David Phillips a , Roland...The Karoo igneous rocks (174ā185 Ma) of southern Africa represent one of the largest continental ļ¬ood basalt...xenoliths sampled by post-Karoo kimberlites in southern Africa. Here we report UāPb ages for lindsleyiteāmathiasite...xenoliths from the ā¼84 Ma Bultfontein kimberlite (Kimberley, South Africa), located in the southern part...Ma, 178 Ā± 29 Ma and 190 Ā± 24 Ma (Ā±2Ļ ). A single zircon grain extracted from the ā¼190 Ma LIMA-bearing sample |  | | Journal (article/letter/editorial) | | Ultramafic nodules from the Kimberley pipes, South Africa F. R. BOYD Geophysical Laboratory, Carnegie...collected in a number of other areas in southern Africa in two important respects: (1) There are no sheared...mosaic-porphyroclastic. In most nodule suites from southern Africa and elsewhere in the world, these low-temperature...(Kimberley, De Beers, Wesselton, Dutoitspan, Bultfontein and Kamfersdam) are clustered together at the...surface as inclusions in the kimberlite. Zircon ages for the Bultfontein, De Beers and Wesselton pipes are 91 |  | | Journal (article/letter/editorial) | | 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...Kimberley kimberlites. Phlogopite grains in the Bultfontein kimberlite exhibit multiple concentric zoning...189ā201 191 Fig. 1. Schematic map of southern Africa showing the location of the Kimberley cluster of |  | Giuliani, Andrea, Fiorentini, Marco L., Martin, Laure A.J., Farquhar, James, Phillips, David, Griffin, William L., LaFlamme, Crystal (2016) Sulfur isotope composition of metasomatised mantle xenoliths from the Bultfontein kimberlite (Kimberley, South Africa): Contribution from subducted sediments and the effect of sulfide alteration on S isotope systematics. Earth and Planetary Science Letters, 445. 114-124 doi:10.1016/j.epsl.2016.04.005 | Journal (article/letter/editorial) | | mantle xenoliths from the Bultfontein kimberlite (Kimberley, South Africa): Contribution from subducted...Sciences, Macquarie University, North Ryde, 2019, New South Wales, Australia b KiDs (Kimberlites and Diamonds)...beneath the diamondiferous Kimberley region (South Africa), we investigated the S isotope systematics...ļ¬ve metasomatised mantle xenoliths from the Bultfontein kimberlite. Pentlandite and chalcopyrite in these...isotopic variability shown by sulļ¬des in the Bultfontein mantle xenoliths is probably due to intermittent |  | | Journal (article/letter/editorial) | | megacryst phases, while subordinate phlogopite and zircon have been recorded at some localities. Eggler et...Jagersfontein (Hops et al. 1989, 1992) in southern Africa. (The locations of these and other southern African...the Nouzees kimberlite in North-West Province, South Africa (Jones 1987). Paired high- and low-Cr ilmenite...Weltevreden-Frank Smith; 4 Kimberley cluster (Bultfontein, de Beers, du Toitspan, Kimberley and Wesselton...megacrysts from the Group II Swartruggens kimberlite, South Africa (De Bruin 1998) showed that the associated clinopyroxene |  | 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 ArāAr 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 inļ¬uenced by different |  | | Journal (article/letter/editorial) | | THE KIMBERLEY MINING DISTRICT, SOUTH AFRICA By I N C R I D P A S U T I N Geologist - Geology Editor Route... W i s c o n s i n . 5 3 1 2 0 INTRODUCTION in Africa was discovered The diamond has been prized for...the Union of South Africa in the vicinity of the town of Kimberley. The mining district lies in the Cape...Kimberley lies the first profitable diamond mine in South Africa: The KimĀ berley Mine. It is located on the...the district: The DeBeers, Wesselton, Bultfontein, and Dutoitspan. A major part of South Africa is a |  | | Book (volume) | | rise and development of the diamond mines of South Africa, from an historical, economic and technical...collect during my many visits to all parts of South Africa where kimberlite deposits occurred and the filing...was necessary to file * "The Diamond Mines of South Africa," by Gardner F. Williams. V . Vl l I I...my attention from the time of my arrival in South Africa was the accidental and cognate inclusions found...had collected specimens from various parts of South Africa for years, it has only been since the publication |  | | Journal (article/letter/editorial) | | from 17 kimberlite localities from SC southern Africa, Canada, Greenland and Russia. These data show...different areas suggest contribution from a range of local processes, such as variable source composition,...filtering PT E 3.3. Canada D 3.2. Southern Africa 3.4. West Greenland CE 3.5. Russia 4. Origin...olivine in 17 kimberlite localities from southern Africa, Canada, Greenland and Russia (Table 1; Fig. 1)...Wesselton and De Beers kimberlites, Kimberley, South Africa; 81-93 in the Fayette County kimberlite, Pennsylvania) |  | Fitzpayne, Angus, Giuliani, Andrea, Maas, Roland, Hergt, Janet, Janney, Philip, Phillips, David (2019) Progressive metasomatism of the mantle by kimberlite melts: SrāNdāHfāPb isotope compositions of MARID and PIC minerals. Earth and Planetary Science Letters, 509. 15-26 doi:10.1016/j.epsl.2018.12.013 | Journal (article/letter/editorial) | | Sciences, Macquarie University, North Ryde 2109, New South Wales, Australia c Melbourne Isotope Geochemistry...Sciences, University of Cape Town, Rondebosch 7701, South Africa b a r t i c l e i n f o Article history:...kimberlites (Kimberley) and orangeites (Newlands) from South Africa are used here to examine the source(s) of mantle...(calculated to the emplacement age of the host Bultfontein kimberlite; 87 Sr/86 Sri : 0.7037ā0.7041; Īµ Ndi...rocks are variable, as demonstrated by published zircon UāPb ages (80ā140 Ma; Konzett et al., 1998; Giuliani |
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