Search among 424 authentic kimberlite stock photos, high-definition images, and pictures, or look at other diamond kimberlite or oyster pearl stock images to enhance your presentation with the perfect visual.
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Rb–Sr age determinations on South African kimberlite pipes. Physics and Chemistry of the Earth 9, 605–617. Barrett, D. R. & Berg, G. W. (1975). Complementary petrographic and strontium-isotope ratio studies of South African kimberlite. Physics and Chemistry of the Earth 9, 619–635.
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The Voorspoed Group II kimberlite pipe is atypical in terms of South African kimberlite pipes. Located in the central region of the Kaapvaal Craton (South Africa), the Voorspoed pipe is one of six ...
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The 0358-trend has no signi®cant Archaean representation and few major aeromagnetic linears either on or off the craton. The 0358-trending kimberlite corridors are sub-parallel to the south east coastline of South Africa and oceanic fracture zones, suggesting an association of on-land extensions and off-shore fracture zones (Marsh, 1973).
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Phlogopite-rich and phlogopite-poor kimberlite intrusions within the Du Toitspan kimberlite pipe, South Africa: Petrogenetic relationships and localised source heterogeneity ... core sample was used to make a polished thin section and the balance of the sample was then passed through a jaw crusher. With the aid of a binocular microscope the ...
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The Finsch diamond mine is located 165km west of Kimberley in the Northern Cape province of South Africa. A semi-automated Tamrock production drill rig is used in the drill rigs and blasting areas. Each LHD in …
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Monastery kimberlite in South Africa (Moore and Gurney . 1989) and in Sloan kimberlite (Colorado-W yoming, US A) (Otter and Gurney 1989). REE patterns for the Lace zir-
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Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Fielda,⁎, Johann Stiefenhoferb, Jock Robeyc, Stephan Kurszlaukisd a DiaKim Consulting Limited, Mayfield, Wells Road, Wookey Hole Wells, Somerset, BA5 1DN, United Kingdom b De Beers Group Services (Pty) Limited, Mineral Resource Management, P.O. Box 82851, Southdale, 2135, South Africa
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diamond dms plant for sale south africa - Crusher South Africa. Consulmet Plant Design – Our team of engineers are highly skilled in the design of DMS, diamond processing, gold …
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Another steep-walled pipe is the 25 ha Tier 1 Udachnaya (Russia) diamond mine, a kimberlite twin pipe (Kostrovitsky et al. 2105). Plan and cross section views of the Udachnaya East and West pipes are shown in Figure 10. The 32 ha Tier 1 Cullinan (South Africa) diamond mine is another kimberlite twin pipe, with multiple discrete kimberlite …
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BlueRock Diamonds has started kimberlite processing from its second pipe, KV1, at the Kareevlei Diamond Mine in the Kimberley region of South Africa. The company has five known kimberlite pipes, including KV1, within the Kareevlei …
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STAR KIMBERLITE DYKE SWARMS, SOUTH AFRICA Nancy Coe, Anton le Roex and John Gurney Department of Geological Sciences, University of Cape Town, South Africa INTRODUCTION The Swartruggens and Star kimberlites are two Group II, diamondiferous, hypabyssal kimberlite dyke swarms, situated in the Northern Province and the Free State …
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Asbestos is associated with the South African diamond mining industry, primarily due to the nature of kimberlite but also the location of the diamond mines in relation to asbestos deposits. South Africa is a uniquely mineral-rich country and, when mining one commodity, it is likely that other minerals, including asbestos, will be accidentally ...
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Province. Kimberlite and orangeite whole-rock major and trace element compositions are similar to other South African localities. Compositionally, the aillikites typically lie off kimberlite and orangeite trends. Groundmass mineral chemistry of the kimberlites has some features more typical of orangeites. Kimberlite whole-rock Sr and Nd isotopes
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STEPHAN KURSZLAUKIS AND WAYNE BARNETT 145 Volcanological and Structural Aspects of the Venetia Kimberlite Cluster – a case study of South African kimberlite maar-diatreme volcanoes Stephan Kurszlaukis De Beers GeoScience Centre, PO Box 82232, Southdale 2135, South Africa e-mail: Stephan.kurszlaukis@debeersgroup Wayne Barnett Venetia Mine, …
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ECLOGITES FROM THE BELLSBANK KIMBERLITE, SOUTH AFRICA 363 13,16]. Shervais et al. [1,17,18] examined eclogites from several kimberlites and identified three groups of mantle eclogite xenoliths each with ap- parently different petrogenetic histories. One group was thought to be a product of high pres-
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The discovery of kimberlite pipes in South Africa during the 19th century changed the landscape of mining significantly. Notable mines such as the Kimberley Mine, also known as the "Big Hole," have become iconic symbols of the diamond rush era. This historical backdrop illustrates the connection between kimberlite and the economic motivations ...
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kimberlite and carbonatite magmas, and modification of magma compositions during ascent and emplacement, are discussed. Geological setting Wesselton Mine is situated 6.5 km southeast of Kimberley in the Northern Cape Province of South Africa and is one of five major diamondiferous kimberlite pipes (Kimberley, Wesselton, Dutoitspan, De Beers and
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constraining the primary kimberlite magma compositions and (3) through quantitative modelling, placing constraints on the composition, compositional evolution and location of their mantle source regions. Geological setting and sampling The Swartruggens and Star kimberlite dyke swarms are located on the Kaapvaal craton (Fig. 1), South Africa, each
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The Uintjiesberg kimberlite diatreme occurs within the Proterozoic Namaqua–Natal Belt, South Africa, approximately 60 km to the southwest of the Kaapvaal craton boundary. It is a group I, calcite kimberlite that has an emplacement age of ∼100 Ma. Major and trace element data, in combination with petrography, are used to evaluate its petrogenesis and the nature of …
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The ca. 1153 Ma Premier kimberlite pipe in South Africa is a classic example of a large (~32 ha) diamondiferous diatreme structure that comprises both coherent magmatic and volcaniclastic kimberlite infill, testifying to a complex emplacement history (Bartlett, 1994; Tappe et al., 2018a).Premier Mine, which has operated intermittently since 1903 and was renamed to …
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Hand specimens were initially crushed using a jaw crusher. Individual rock chips were selected with careful inspection so as to avoid weathered surfaces or the incorporation of xenolithic material. ... Geochemistry of the Uintjiesberg kimberlite, South Africa: petrogenesis of an off-craton, Group 1, kimberlite. Lithos 74, 149–165. Howarth, G ...
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Huge truck unloading kimberlite in a crusher in an open pit diamond mine, in Botswana. Save. Rough diamond shiny gem mineral stone in mine. Concept of mining and extraction of jewelery. ... 0.55 ct octahedral diamond from South Africa nestled in kimberlite isolated on white background. Save. Career kimberlite diamond pipe "Mir", Yakutia ...
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Fresh samples of hypabyssal kimberlite from the five major kimberlite pipes in the Kimberley area of South Africa have been analysed for their bulk-rock major and trace element geochemistry. The geochemical data allow identification of the influence of crustal contamination in certain samples, best illustrated in terms of elevated SiO 2, Al 2 ...
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The Venetia kimberlite cluster in northernmost South Africa was emplaced at ~533 Ma (Allsopp et al., 1995) and is one of South Africa's most diamondiferous kimberlites with a grade of >1.2 ct/ton ...
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This restructuring created a company that can be empowered under the terms of South Africa's Mineral & Petroleum Resources Development Act. In January 2011, De Beers sold the Finsch diamond mine to Petra …
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South Africa is characterized by multiple episodes of kimberlite intrusion. However, the age and Sr Nd isotopic compositions of the primary magma of most of the earlier emplacement events remain unresolved. Using in situ secondary ion mass spectrometry and laser ablation multi-collector inductively coupled plasma mass spectrometry, the U Pb ages and Sr …
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