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Journal articles on the topic 'Kimberlite – South Africa – Kroonstad'

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Published: 4 June 2021

Last updated: 15 February 2022

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1

Howarth, Geoffrey H., E. Michael, W. Skinner, and Stephen A. Prevec. "Petrology of the hypabyssal kimberlite of the Kroonstad group II kimberlite (orangeite) cluster, South Africa: Evolution of the magma within the cluster." Lithos 125, no. 1-2 (July 2011): 795–808. http://dx.doi.org/10.1016/j.lithos.2011.05.001.

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2

Howarth, Geoffrey H., and E. Michael W. Skinner. "The geology and emplacement of the volcaniclastic infill at the Voorspoed Group II kimberlite (orangeite) pipe, Kroonstad Cluster, South Africa." Journal of Volcanology and Geothermal Research 231-232 (June 2012): 24–38. http://dx.doi.org/10.1016/j.jvolgeores.2012.04.005.

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3

da Costa, Alberto J. M. "Palmietfontein kimberlite pipe, South Africa—A case history." GEOPHYSICS 54, no. 6 (June 1989): 689–700. http://dx.doi.org/10.1190/1.1442697.

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The Palmietfontein kimberlite pipe is located 150 km northwest of Johannesburg, South Africa. It was emplaced at the contact between mafic rocks of the Bushveld complex and syenites of the Pilanesberg complex, and coincides with the intersection of two major faults. Palmietfontein is one of the larger known kimberlite pipes in South Africa; it has a surface area of 12 ha and is diamondiferous. The present geophysical study was designed to assist in planning an extensive program of trenching and drilling. Unweathered kimberlite has geophysical responses very similar to the country rock at Palmietfontein. Weathering and alteration of the upper 50 m of the pipe, however, have resulted in various physical changes, which has made the target amenable to investigation by various geophysical techniques. The surveys used in this study are gravity, electrical, seismic refraction, and airborne and ground magnetics and electromagnetics (EM). The boundary of the pipe was accurately defined, and the dip of the wallrock contact was determined by using various models and combinations of techniques. A small satellite body of kimberlite was also discovered during the course of this investigation. The most suitable techniques for kimberlite prospecting, particularly when the top portion of the kimberlite is weathered, are airborne EM and magnetics, combined with the Slingram ground-EM system. For more quantitative results, gravity and seismic surveys should be used.

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4

WHITE, J. L., R. S. J. SPARKS, K. BAILEY, W. P. BARNETT, M. FIELD, and L. WINDSOR. "KIMBERLITE SILLS AND DYKES ASSOCIATED WITH THE WESSELTON KIMBERLITE PIPE, KIMBERLEY, SOUTH AFRICA." South African Journal of Geology 115, no. 1 (February 23, 2012): 1–32. http://dx.doi.org/10.2113/gssajg.115.1.1.

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5

Schulze, Daniel J., John W. Valley, and Michael J. Spicuzza. "Coesite eclogites from the Roberts Victor kimberlite, South Africa." Lithos 54, no. 1-2 (October 2000): 23–32. http://dx.doi.org/10.1016/s0024-4937(00)00031-1.

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6

Maier, W. D. "Platinum-group elements in peridotite xenoliths and kimberlite from the Premier kimberlite pipe, South Africa." South African Journal of Geology 108, no. 3 (September 1, 2005): 413–28. http://dx.doi.org/10.2113/108.3.413.

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7

HARRIS, M. "Geochemistry of the Uintjiesberg kimberlite, South Africa: petrogenesis of an off-craton, group I, kimberlite." Lithos 74, no. 3-4 (June 2004): 149–65. http://dx.doi.org/10.1016/j.lithos.2004.02.001.

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8

Viljoen, A., P. S. van Wyk, D. C. Nowell, and T. J. Gulya. "Occurrence of Downy Mildew on Sunflower in South Africa." Plant Disease 81, no. 1 (January 1997): 111. http://dx.doi.org/10.1094/pdis.1997.81.1.111c.

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Downy mildew, caused by Plasmopara halstedii (Farl.) Berl. & De Toni in Sacc., is an economically important disease of sunflower (Helianthus annuus L.) in Europe and the United States (1). The disease was first noticed in South Africa in a commercial field near Standerton and in a seed production field near Kroonstad during the 1993 to 1994 planting season. During the 1995 to 1996 season, downy mildew was found in experimental hybrids near Heilbron, and in commercial fields near Heil-bron, Marikana, and Potchefstroom. At Heilbron, five hybrids were infected with P. halstedii, whereas three others showed symptoms of downy mildew at Potchefstroom and Marikana. All commercially cultivated hybrids have been developed in South Africa. Disease incidence in all the fields was low, with less than 1% of plants affected by the disease. Diseased plants were dwarfed and displayed veinal chlorosis of leaves typically associated with downy mildew of sunflower. White fungal growth commonly occurred on lower leaf surfaces. Sunflower seedlings inoculated with P. halstedii produced symptoms characteristic of downy mildew. The occurrence of the disease in many geographic areas and on various hybrids in South Africa suggests that the fungus is well established. Recent outbreaks can be attributed to the cool, wet, climatic conditions of the 1993 to 1994 and 1995 to 1996 seasons. The susceptibility of local hybrids suggests that downy mildew is a potentially dangerous disease of sunflower in South Africa. Reference: (1) J. F. Miller and T. J. Gulya. Crop Sci. 27:210, 1987.

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9

Ogilvie-Harris, R. C., M. Field, R. S. J. Sparks, and M. J. Walter. "Perovskite from the Dutoitspan kimberlite, Kimberley, South Africa: implications for magmatic processes." Mineralogical Magazine 73, no. 6 (December 2009): 915–28. http://dx.doi.org/10.1180/minmag.2009.073.6.915.

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AbstractPerovskite compositions are used to investigate the relationship between the minor components (i.e. LREE, Fe3+ and Nb) and the oxygen fugacity (fo2) of perovskite in four different kimberlite lithofacies from the Dutoitspan pipe, Kimberley, South Africa, which range from diamondiferous to barren. The perovskite textures and chemical variations provide insight into magmatic and eruptive processes. Some crystals display cores with rims separated by a sharp boundary. The cores contain larger Na and LREE contents relative to the rims, which show a large increase in Fe3+ and Al. The mid-grade and barren kimberlites have bi-modal cores, reflected in the mineral chemistry, signifying multiple batches of magma and magma mixing. The fo2 of the magma is determined by an Fe-Nb oxygen barometer. The most diamondiferous kimberlite has the greatest Fe3+ content and highest fo2 (NNO –3.6 to –1.1). The kimberlite containing large diamonds has the smallest Fe3+ content and lowest fo2 (NNO –5.2 to –3.0). The barren and mid-grade kimberlites display a wide range of fo2,(NNO –5.3 to –1.5) as a result of perovskites forming in different melts and subsequently mixing together. Chemical and petrological evidence suggests that the volatile content, degassing, decompression and rate of crystallization can influence the rate at which the magma is erupted. One possibility is that the most oxidized magma, containing the highest volatile content, is therefore erupted much more rapidly, preserving diamond as a consequence.

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10

Basson, I. J. "Structural overview of selected Group II kimberlite dyke arrays in South Africa: implications for kimberlite emplacement mechanisms." South African Journal of Geology 106, no. 4 (December 1, 2003): 375–94. http://dx.doi.org/10.2113/106.4.375.

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11

Viljoen, K. S., P. M. Swash, M. L. Otter, D. J. Schulze, and P. J. Lawless. "Diamondiferous garnet harzburgites from the Finsch kimberlite, Northern Cape, South Africa." Contributions to Mineralogy and Petrology 110, no. 1 (March 1992): 133–38. http://dx.doi.org/10.1007/bf00310887.

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12

Dawson, J. B., and J. V. Smith. "Relationships between eclogites and certain megacrysts from the Jagersfontein kimberlite, South Africa." Lithos 19, no. 3-4 (October 1986): 325–30. http://dx.doi.org/10.1016/0024-4937(86)90031-9.

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13

Moore, R. O., W. L. Griffin, J. J. Gurney, C. G. Ryan, D. R. Cousens, S. H. Sie, and G. F. Suter. "Trace element geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa." Lithos 29, no. 1-2 (December 1992): 1–18. http://dx.doi.org/10.1016/0024-4937(92)90031-s.

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14

Phillips, D., and T. C. Onstott. "Argon isotopic systematics of mantle xenolith phases from the premier Kimberlite, South Africa." Chemical Geology 70, no. 1-2 (August 1988): 40. http://dx.doi.org/10.1016/0009-2541(88)90290-2.

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15

D’Eyrames, Elisabeth, Emilie Thomassot, Yumi Kitayama, Alexander Golovin, Andrey Korsakov, and Dmitri Ionov. "A mantle origin for sulfates in the unusual “salty” Udachnaya-East kimberlite from sulfur abundances, speciation and their relationship with groundmass carbonates." Bulletin de la Société géologique de France 188, no. 1-2 (2017): 6. http://dx.doi.org/10.1051/bsgf/2017007.

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The Udachnaya-East pipe in Yakutia in Siberia hosts a unique dry (serpentine-free) body of hypabyssal kimberlite (<0.64wt% H2O), associated with a less dry type of kimberlite and a serpentinized kimberlitic breccia. The dry kimberlite is anomalously rich in salts (Na2O and Cl both up to 6wt%) whereas the slightly less dry and the breccia kimberlite are salt free. Yet the Udachnaya kimberlite is a group-I kimberlite, as is the archetypical kimberlite from Kimberley, South Africa. Samples were studied from the three different types of kimberlite (dry-salty, n=8, non-salty, n=5 and breccia, n=3) regarding their mineralogy, geochemistry, and more specifically their sulfur content. Our results show the salty kimberlite is unprecedentedly rich in sulfur (0.13-0.57wt%) compared to the non-salty kimberlite (0.04-0.12wt%) and the breccia (0.29-0.33wt%). In the salty kimberlite, most of the sulfur is present as sulfates (up to 97% of Stotal) and is disseminated throughout the groundmass in close association with Na-K-bearing carbonates. Sulfates occur within the crystal structure of these Na-K-bearing carbonates as the replacement of (CO3) by (SO3) groups, or as Na- and K-rich sulfates (e.g. aphtitalite, (K,Na)3Na(SO4)2). The associated sulfides are djerfisherite; also Na- and K-rich species. The close association of sulfates and carbonates in these S-rich alkaline rocks suggests that the sulfates crystallized from a mantle-derived magma, a case that has strong implication for the oxygen fugacity of kimberlite magmatism and more generally for the global S budget of the mantle.

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16

Ramokgaba, Lesego, Anton le Roex, and Jock Robey. "Phlogopite-rich and phlogopite-poor kimberlite intrusions within the Du Toitspan kimberlite pipe, South Africa: Petrogenetic relationships and localised source heterogeneity." Lithos 390-391 (June 2021): 106125. http://dx.doi.org/10.1016/j.lithos.2021.106125.

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17

Dludla, S., A. P. le Roex, and J. J. Gurney. "Eclogite xenoliths from the Premier kimberlite, South Africa: geochemical evidence for a subduction origin." South African Journal of Geology 109, no. 3 (September 1, 2006): 353–68. http://dx.doi.org/10.2113/gssajg.109.3.353.

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18

McCarthy, T. S., and J. G. Allan. "A possible new alluvial diamond field related to the Klipspringer kimberlite swarm, South Africa." South African Journal of Geology 110, no. 4 (December 1, 2007): 503–10. http://dx.doi.org/10.2113/gssajg.110.4.503.

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19

HANSON, E. K., J. M. MOORE, E. M. BORDY, J. S. MARSH, G. HOWARTH, and J. V. A. ROBEY. "CRETACEOUS EROSION IN CENTRAL SOUTH AFRICA: EVIDENCE FROM UPPER-CRUSTAL XENOLITHS IN KIMBERLITE DIATREMES." South African Journal of Geology 112, no. 2 (September 1, 2009): 125–40. http://dx.doi.org/10.2113/gssajg.112.2.125.

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20

Nielsen, Troels F. D., Martin Jebens, Sven M. Jensen, and Karsten Secher. "Archetypal kimberlite from the Maniitsoq region, southern West Greenland and analogy to South Africa." Geological Survey of Denmark and Greenland (GEUS) Bulletin 10 (November 29, 2006): 45–48. http://dx.doi.org/10.34194/geusb.v10.4906.

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Ultramafic dyke rocks with kimberlitic megacrysts and mantle nodules have been known for decades from the northern part of the Archaean block and adjacent Proterozoic terranes in southern West Greenland (Fig. 1; Escher & Watterson 1973; Goff 1973; Scott 1981; Larsen & Rex 1992; Mitchell et al. 1999). Some of the dykes have proved to be diamondiferous (see Jensen et al. 2004a, b, for exploration results, diamond contents, and references). The c. 600 Ma old dykes werecalled ‘kimberlitic’ by Larsen & Rex (1992), but Mitchell et al. (1999) concluded that they were best referred to a ‘carbonatiteultramafic lamprophyre’ suite (aillikites or melnoites). Mitchell et al. (1999) further suggested that the West Greenland province represents “one of the few bona fide examples of ultramafic lamprophyre which contain diamonds”. Reports on indicator mineral assemblages (Jensen et al. 2004b) and diamond contents (e.g. Hudson Resources Inc. 2005) have re-opened the discussion on the classification of the dykes. The results of an investigation of the Majuagaa dyke (Nielsen & Jensen 2005) are summarised below, together with the preliminary results of a regional investigation of the groundmass minerals of the dykes. It is concluded that dykes in the Maniitsoq region are similar to archetypal, South African, on-craton, Type 1 kimberlites, and that all regions of the West Greenland province of ultramafic magmatism are favourable for diamond exploration.

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21

Howarth, Geoffrey H., and Lawrence A. Taylor. "Multi-stage kimberlite evolution tracked in zoned olivine from the Benfontein sill, South Africa." Lithos 262 (October 2016): 384–97. http://dx.doi.org/10.1016/j.lithos.2016.07.028.

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22

Appleyard, C. M., D. R. Bell, and A. P. le Roex. "Petrology and geochemistry of eclogite xenoliths from the Rietfontein kimberlite, Northern Cape, South Africa." Contributions to Mineralogy and Petrology 154, no. 3 (March 21, 2007): 309–33. http://dx.doi.org/10.1007/s00410-007-0195-7.

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23

Donnelly, Cara L., William L. Griffin, Suzanne Y. O’Reilly, Norman J. Pearson, and Simon R. Shee. "The Kimberlites and related rocks of the Kuruman Kimberlite Province, Kaapvaal Craton, South Africa." Contributions to Mineralogy and Petrology 161, no. 3 (June 25, 2010): 351–71. http://dx.doi.org/10.1007/s00410-010-0536-9.

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24

Webb, Susan J., Lewis D. Ashwal, and R. Grant Cawthorn. "Continuity between eastern and western Bushveld Complex, South Africa, confirmed by xenoliths from kimberlite." Contributions to Mineralogy and Petrology 162, no. 1 (November 5, 2010): 101–7. http://dx.doi.org/10.1007/s00410-010-0586-z.

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25

STRIPP, G. R., M. FIELD, J. C. SCHUMACHER, R. S. J. SPARKS, and G. CRESSEY. "Post-emplacement serpentinization and related hydrothermal metamorphism in a kimberlite from Venetia, South Africa." Journal of Metamorphic Geology 24, no. 6 (August 2006): 515–34. http://dx.doi.org/10.1111/j.1525-1314.2006.00652.x.

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26

Sutherland, Donald G. "The diamond deposits of the Mandala basin, SE Guinea, West Africa." Transactions of the Royal Society of Edinburgh: Earth Sciences 84, no. 2 (1993): 137–49. http://dx.doi.org/10.1017/s026359330000345x.

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AbstractThe Mandala drainage basin lies in the central part of the West African craton immediately to the south of the regional watershed. There has been frequent kimberlite dyke intrusion in the basin. The kimberlites range in grade from apparently barren to having a high diamond content. The presence of other undiscovered kimberlites can be inferred from the distribution, chemistry and abundance of kimberlite satellite minerals and variations in diamond size and character. Secondary diamond deposits are widespread with the main concentrations in the present and former Mandala valley bottoms. Tributaries have lower diamond contents. There are systematic variations in the alluvial diamond characteristics which can be explained in terms of diamond sources as well as transport of the diamonds away from those sources. The occurrence of the secondary diamond deposits is explained by the form and distribution of the primary sources, the nature of the drainage network and the long-term evolution of the drainage basin. Since the Pliocene or Early Pleistocene the Mandala has been rejuvenated with incision of the main channel by up to 26 m. This incision has led to flushing of the tributaries and storage of sediment, including diamonds, in the principal channel.

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27

Doyle, P. M. "Fine-grained pyroxenites from the Gansfontein kimberlite, South Africa: Evidence for megacryst magma - mantle interaction." South African Journal of Geology 107, no. 1-2 (June 1, 2004): 285–300. http://dx.doi.org/10.2113/107.1-2.285.

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28

Appleyard, C. M., K. S. Viljoen, and R. Dobbe. "A study of eclogitic diamonds and their inclusions from the Finsch kimberlite pipe, South Africa." Lithos 77, no. 1-4 (September 2004): 317–32. http://dx.doi.org/10.1016/j.lithos.2004.04.023.

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29

Mitchell, Roger H., and Henry O. A. Meyer. "Niobian K–Ba–V titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa." Mineralogical Magazine 53, no. 372 (September 1989): 451–56. http://dx.doi.org/10.1180/minmag.1989.053.372.04.

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AbstractCompositional data are presented for Nb-Ba-K-V titanates from micaceous kimberlite (Star mine, S. Africa). These data significantly extend the previously known range of solid solutions in naturally occurring members of the hollandite group. Two distinct suites of crystals occur. One is a suite of primary groundmass prismatic crystals that are Ba-K-V-rich and represent solid-solutions from the priderite series towards mannardite. The second suite consists of anhedral xenocrysts that are Ba-free. In this suite relatively Nb-rich varieties (>4.0% Nb2O5) represent solid-solution towards a niobian-bearing potassian analogue of mannardite, whereas relative Nb-poor (<3.0% Nb2O5) varieties are Nb-bearing vanadian priderites. These hollandite-group minerals have compositions that differ significantly from priderites found in lamproites.

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30

Soltys, Ashton, Andrea Giuliani, and David Phillips. "A new approach to reconstructing the composition and evolution of kimberlite melts: A case study of the archetypal Bultfontein kimberlite (Kimberley, South Africa)." Lithos 304-307 (April 2018): 1–15. http://dx.doi.org/10.1016/j.lithos.2018.01.027.

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31

Giuliani, Andrea, Ashton Soltys, David Phillips, Vadim S. Kamenetsky, Roland Maas, Karsten Goemann, Jon D. Woodhead, Russell N. Drysdale, and William L. Griffin. "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 (April 2017): 342–56. http://dx.doi.org/10.1016/j.chemgeo.2016.10.011.

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32

Haggerty, S. E. "Majorite-indicative ultradeep (>300 km) xenoliths with spinel associations from the Jagersfontein kimberlite, South Africa." South African Journal of Geology 120, no. 1 (March 1, 2017): 1–20. http://dx.doi.org/10.25131/gssajg.120.1.1.

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33

Doppelhammer, Sheila K., and R. B. Hargraves. "Paleomagnetism of the Schuller and Franspoort kimberlite pipes in South Africa and an improved Premier pole." Precambrian Research 69, no. 1-4 (October 1994): 193–97. http://dx.doi.org/10.1016/0301-9268(94)90086-8.

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34

DAWSON, J. B., S. L. HARLEY, R. L. RUDNICK, and T. R. IREL. "Equilibration and reaction in Archaean quartz-sapphirine granulite xenoliths from the Lace kimberlite pipe, South Africa." Journal of Metamorphic Geology 15, no. 2 (February 1997): 253–66. http://dx.doi.org/10.1111/j.1525-1314.1997.00017.x.

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35

Barton, J. "Introduction to recent studies of geology in and around the Venetia kimberlite pipes, Limpopo Belt, South Africa." South African Journal of Geology 106, no. 2-3 (September 1, 2003): 101–2. http://dx.doi.org/10.2113/106.2-3.101.

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36

Giuliani, A., D. Phillips, M. L. Fiorentini, M. A. Kendrick, R. Maas, B. A. Wing, J. D. Woodhead, T. H. Bui, and V. S. Kamenetsky. "Mantle oddities: A sulphate fluid preserved in a MARID xenolith from the Bultfontein kimberlite (Kimberley, South Africa)." Earth and Planetary Science Letters 376 (August 2013): 74–86. http://dx.doi.org/10.1016/j.epsl.2013.06.028.

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37

Howarth, Geoffrey H., and E. Michael W. Skinner. "Sub-volcanic development of kimberlite pipes: Evidence from the Lace and Voorspoed (Group II) kimberlites, South Africa." Journal of Volcanology and Geothermal Research 268 (December 2013): 1–16. http://dx.doi.org/10.1016/j.jvolgeores.2013.10.002.

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38

Smith, Craig B., Trevor C. Clark, Erika S. Barton, and John W. Bristow. "Emplacement ages of kimberlite occurrences in the Prieska region, southwest border of the Kaapvaal Craton, South Africa." Chemical Geology 113, no. 1-2 (March 1994): 149–69. http://dx.doi.org/10.1016/0009-2541(94)90010-8.

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39

Abersteiner, Adam, Vadim S. Kamenetsky, Karsten Goemann, Andrea Giuliani, Geoffrey H. Howarth, Montgarri Castillo-Oliver, Jay Thompson, Maya Kamenetsky, and Alexander Cherry. "Composition and emplacement of the Benfontein kimberlite sill complex (Kimberley, South Africa): Textural, petrographic and melt inclusion constraints." Lithos 324-325 (January 2019): 297–314. http://dx.doi.org/10.1016/j.lithos.2018.11.017.

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40

BELL, D. R. "Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa." Journal of Petrology 45, no. 8 (July 2, 2004): 1539–64. http://dx.doi.org/10.1093/petrology/egh015.

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41

Coe, Nancy, Anton le Roex, John Gurney, D. Graham Pearson, and Geoff Nowell. "Petrogenesis of the Swartruggens and Star Group II kimberlite dyke swarms, South Africa: constraints from whole rock geochemistry." Contributions to Mineralogy and Petrology 156, no. 5 (April 17, 2008): 627–52. http://dx.doi.org/10.1007/s00410-008-0305-1.

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42

Griffin, W. L., S. R. Shee, C. G. Ryan, T. T. Win, and B. A. Wyatt. "Harzburgite to lherzolite and back again: metasomatic processes in ultramafic xenoliths from the Wesselton kimberlite, Kimberley, South Africa." Contributions to Mineralogy and Petrology 134, no. 2-3 (February 1999): 232–50. http://dx.doi.org/10.1007/s004100050481.

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43

McCammon, C. A. "Oxidation during metasomatism in ultramafic xenoliths from the Wesselton kimberlite, South Africa: implications for the survival of diamond." Contributions to Mineralogy and Petrology 141, no. 3 (June 2001): 287–96. http://dx.doi.org/10.1007/s004100100244.

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44

Wu, Fu-Yuan, Roger H. Mitchell, Qiu-Li Li, Jing Sun, Chuan-Zhou Liu, and Yue-Heng Yang. "In situ UPb age determination and SrNd isotopic analysis of perovskite from the Premier (Cullinan) kimberlite, South Africa." Chemical Geology 353 (August 2013): 83–95. http://dx.doi.org/10.1016/j.chemgeo.2012.06.002.

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45

Abersteiner, Adam, Andrea Giuliani, Vadim S. Kamenetsky, and David Phillips. "Petrographic and melt-inclusion constraints on the petrogenesis of a magmaclast from the Venetia kimberlite cluster, South Africa." Chemical Geology 455 (April 2017): 331–41. http://dx.doi.org/10.1016/j.chemgeo.2016.08.029.

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46

Perritt, S., R. Preston, F. Viljoen, and G. Van Der Linde. "Morphology, Micro-Structure and Chemistry of A Deformed Garnet Megacryst Suite From Monteleo Kimberlite, Free State Province, South Africa." South African Journal of Geology 118, no. 4 (December 2015): 439–54. http://dx.doi.org/10.2113/gssajg.118.4.439.

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Dawson, J. B., and J. V. Smith. "Reduced sapphirine granulite xenoliths from the Lace Kimberlite, South Africa; implications for the deep structure of the Kaapvaal Craton." Contributions to Mineralogy and Petrology 95, no. 3 (March 1987): 376–83. http://dx.doi.org/10.1007/bf00371851.

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Howarth, Geoffrey H., and Juliane Gross. "Diffusion-controlled and concentric growth zoning revealed by phosphorous in olivine from rapidly ascending kimberlite magma, Benfontein, South Africa." Geochimica et Cosmochimica Acta 266 (December 2019): 292–306. http://dx.doi.org/10.1016/j.gca.2019.08.006.

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Deines, Peter, J. W. Harris, and J. J. Gurney. "The carbon isotopic composition and nitrogen content of lithospheric and asthenospheric diamonds from the Jagersfontein and Koffiefontein kimberlite, South Africa." Geochimica et Cosmochimica Acta 55, no. 9 (September 1991): 2615–25. http://dx.doi.org/10.1016/0016-7037(91)90377-h.

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Brown, R. J., M. Tait, M. Field, and R. S. J. Sparks. "Geology of a complex kimberlite pipe (K2 pipe, Venetia Mine, South Africa): insights into conduit processes during explosive ultrabasic eruptions." Bulletin of Volcanology 71, no. 1 (April 8, 2008): 95–112. http://dx.doi.org/10.1007/s00445-008-0211-4.

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