 | | 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...thick off-craton lithosphere capable of hosting diamond. This inference is supported by U – Pb thermochronology...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) |  | 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) | | A. ROBEY 125 CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE...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...fourteen Group I kimberlite diatremes in central South Africa were examined for upper crustal xenoliths in...eruption (~85 Ma), they were restricted to the south-eastern half of the study area. At the latter time |  | | Journal (article/letter/editorial) | | enrichment of Proterozoic mantle south of the Kaapvaal Craton, South Africa: origin of sinusoidal REE patterns...been sampled from four kimberlite intrusions, Melton Wold, Hebron, Uintjiesberg and Markt, emplaced through...Geological Sciences, University of Cape Town, Rondebosch 7701, South Africa 2 Lamont‑Doherty Earth Observatory...Moine et al. 2004; Powell et al. 2004). In southern Africa, the majority of studies concerned with understanding...study, we focus on mantle xenoliths found in the Melton Wold, Hebron and Uintjiesberg kimberlites erupted |  | | 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...Johannesburg, South Ah'ica. ** Present address: School of Applied Geology, University of New South Wales, Kensington...(1932), a group of workers at the University of Cape Town has been engaged on further petrological and...specimens are nearly all from kimberlites in South Africa, Lesotho and Rhodesia. We do not claim t h a |  | | Journal (article/letter/editorial) | | e l s ev i e r. c o m / l o c a t e / e p s l South Atlantic DUPAL anomaly — Dynamic and compositional...Geological Sciences, University of Cape Town, Rondebosch, 7701, South Africa a r t i c l e i n f o Article...mantle a b s t r a c t The DUPAL anomaly in the South Atlantic is present in intra-plate volcanism associated...we identify the Namaqua–Natal Belt of southern Africa as the most likely origin of any subcontinental...approximately linear belt that stretches from the South Atlantic Ocean at about 40°S latitude eastward all |  | Smith, Craig B., Clark, Trevor C., Barton, Erika S., Bristow, John W. (1994) Emplacement ages of kimberlite occurrences in the Prieska region, southwest border of the Kaapvaal Craton, South Africa. Chemical Geology, 113 (1) 149-169 doi:10.1016/0009-2541(94)90010-8 | Journal (article/letter/editorial) | | region, southwest border of the Kaapvaal Craton, South Africa Craig B. Smith a, Trevor C. Clark a, Erika S...Johannesburg, South Africa bAnglo American Research Laboratories, PO Box 106, Crown Mines, 2025, South Africa...southwest part of the Kaapvaal Craton, near Prieska, South Africa, vary from as old as 170 Ma to as young as 74...74 Ma, similar to ages elsewhere in southern Africa. Isotopically defined Group-I and -II kimbeflites...of 116119 Ma. Kimbeflites in Domain IV, to the south of the craton boundary, are of Group-I affinity |  | | Journal (article/letter/editorial) | | Perovskite crystals from the older, ca. 700–480 ka activity period of the WEVF (Rother Kopf, Grauley...contrast, Emmelberg perovskite from the younger, ca. <80 ka WEVF eruptive pulse is generally highly enriched...consistent with known or inferred eruption ages of >480 ka from the literature. Emmelberg perovskite analyses...(238U)/(232Th) diagram and define an isochron age of 48.4 ± 2.4 ka (2r). The 238 230 U/ Th perovskite age for Emmelberg...published 40Ar/39Ar leucite ages averaging 49 ± 4 ka, albeit with smaller uncertainties. This similarity |  | | Journal (article/letter/editorial) | | Botswana) and cratonmargin settings (southern Superior, south-western Kaapvaal, Lesotho, Gibeon, Minas Gerais)...garnet-facies depleted lithospheres and their contained diamond reservoir. © 2009 Elsevier B.V. All rights reserved...matter of days, and at relatively low cost. The diamond exploration industry has naturally found substantial...PNG85 PBKN PNT00 PCr P38 Amphibole Clinopyroxene Diamond Graphite Garnet Olivine Orthopyroxene Phlogopite...well-known Group-1 kimberlites across Southern Africa record no material variation in conductive geothermal |  | | Journal (article/letter/editorial) | | Available online 31 March 2009 Keywords: Southern Africa Kimberlite Perovskite Sr-isotopes a b s t r a...Group II and transitional kimberlites from southern Africa. Although broadly consistent with published whole-rock...debated than for the kimberlite fields of southern Africa. Consequently, we have returned to some of these...region. In many respects the kimberlites of southern Africa present a more complex problem than those of the...environment. Finally, it is well known that southern Africa preserves Group I, Group II and transitional kimberlites |  | | Journal (article/letter/editorial) | | DEPARTMENT OF EARTH SCIENCES, DURHAM UNIVERSITY, SOUTH ROAD, DURHAM DH1 3LE, UK 2 ARIZONA STATE UNIVERSITY...CENTRE, PO BOX 82232, SOUTHDALE GAUTENG 2135, SOUTH AFRICA 5 NERC ISOTOPE GEOSCIENCES LABORATORY, KINGSLEY...PUBLICATION JULY 1, 2004 Kimberlites from Southern Africa, along with their low-Cr megacrysts, have unusual..., 1995). The samples studied are from Southern Africa, belonging to the isotopic Groups I and II of Smith...Kallvallei and Star (S. Africa) kimberlites plus the Kamfersdam dump (Kimberley, S. Africa) have been analysed |  | | Journal (article/letter/editorial) | | implications for global kimberlite genesis and diamond exploration L.M. Heaman a,*, B.A. Kjarsgaard b...Tertiary/Cretaceous domain (48 – 74 Ma) and IV-a northern mixed domain consisting of Jurassic and Permian...kimberlite emplacement ages from North America, southern Africa and Russia indicates that a high proportion of...Cenozoic/Mesozoic kimberlite magmatism in southern Africa is dominated by a continuum of activity between...magmatism variably occur in North America, southern Africa and Yakutia at 590 – 615, 520 – 540, 435 – 450 |  | | Journal (article/letter/editorial) | | modification of the Kaapvaal cratonic lithosphere, South Africa Alan F. Kobussen ⁎, William L. Griffin, Suzanne...northeast traverse across the Kaapvaal Craton in South Africa. A minimum age difference of 10 m.y. exists...known kimberlite bodies distributed across southern Africa. These kimberlites can be classified as either Group...Group I kimberlites along a traverse across South Africa (Fig. 1). The traverse extends southwest to...NE Fig. 1. Simplified tectonic map of southern Africa, with locations of Group I and Group II kimberlites |  | | Journal (article/letter/editorial) | | thermochronometry of lower crustal xenoliths, southern Africa Received: 15 February 2002 / Accepted: 23 September...offcraton continental lithosphere beneath southern Africa. The relatively low closure temperature of the...the ‘‘off-craton’’ Proterozoic domains of southern Africa indicates that their lithospheric thermal profiles...potential for diamond stability beneath both Proterozoic and Archean domains of southern Africa. Subsequent...duration of Mesozoic heating to £ 550 C for ‡50 ka. This result indicates that the thermal perturbation |  | Maier, W.D., Peltonen, P., McDonald, I., Barnes, S.J., Barnes, S.-J., Hatton, C., Viljoen, F. (2012) The concentration of platinum-group elements and gold in southern African and Karelian kimberlite-hosted mantle xenoliths: Implications for the noble metal content of the Earth's mantle. Chemical Geology, 302. 119-135 doi:10.1016/j.chemgeo.2011.06.014 | Journal (article/letter/editorial) | | 0001, South Africa g Department of Geology, University of Johannesburg, Auckland Park 2006, South Africa...from more than 20 kimberlite pipes in southern Africa and the Karelian craton, Fennoscandian Shield,...sample localities and tectonic units of southern Africa (modified after Griffin et al., 2004). (B) Generalized...collected from the “mantle room” at the University of Cape Town, including the samples from Jagersfontein,...mines), as well as the off-craton Markt and Melton Wold samples. “The Letlhakane, Venetia, Finsch and |  | | Book | | lithospheres forever? 4 Chemical tomography of the northern Siberian Platform: imaging the lithosphere 6...metamorphic rocks, which are potential source rocks of diamond and other commodities such as Ni. Chromite has...has long been used as an indicator mineral in diamond exploration because it is very resistant to weathering...occurred of unstable and dynamic simultaneously with diamond growth histories during growth (Publication 110...simultaneously with diamonds is evident not as diamond growth the fine cross-hatched linear features typical |  | | Book | | monographs devoted to the petrology of primary diamond-bearing rocks. It should be noted that, in common...about upper mantle xenoliths or exploration for diamond. The principal objective of this work is to present...present a revised terminology for primary diamond-bearing rocks. To this end orangeites are recognized...discovery of these rocks in the Orange Free State of South Africa. The name is not a new one: In 1928, Percy Wagner...this day, highly speculative. Although primary diamond-bearing rocks are relatively rare rock types, they |
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