Dolerite, the Karoo's Fracking Game-Changer
Dolerite's sills and dykes created the Karoo's distinctive flat-topped hills and dramatic landscapes. Dolerite created some of the rock that Stone Age people used for tools. Dark dolerite boulders helped provide the canvas for …
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Some practical Aspects regarding the handling of …
DOLERITE FOR BASE AND SUB-BASE CONSTRUCTION E G Kleyn and A O Bergh CSIR Built Environment, PO Box 395, Pretoria ABSTRACT Good quality base and sub-base material for road pavement construction is becoming increasingly scarce. Dolerite is one of the more abundant natural road building materials in South Africa.
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5383 SAICE Journal of Civil Engineering Vol 52 No 2
Plasticity Index of dolerite road construction material E Kleyn, A Bergh, P Botha Table 1 Results of tests performed by various quarries producing high-quality basecourse material in South Africa (ASPASA, 1994) Type of stone Area Sample No PI on minus 0,425mm PI on minus 0,075mm 5 Dolerite1 SE Transvaal 1 1,7 7,9 SE Transvaal 2 0,6 3,9 OFS 3 3 ...
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Dolerite Sale South Africa
Geochemistry of dolerite intrusions of the southeastern … The borehole KWV-01 was drilled near Willowvale (32°14′43.10″ S, 28°35′08.10″ E; 263 m above sea level (asl)) in South Africa's Eastern Cape Province, in an area known to have abundant dolerite intrusions (Fig. 1).
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A review of rock studies for archaeologists, and an analysis …
The physical requirements of stone tools tend to prescribe the choice of rocks for their production. Hardness, roughness and impact toughness dictate the ease of knapping as well as the durability of flaked tools, and these rock properties can be measured by mechanical tests described here. Geochemical and petrographic analyses of archaeological and geological …
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Stone
Our stone are suitable for Concrete products, Asphalt paving and ballast. Buy Stone. Road Stone. ... (PO Box 787416, on, 2146, South Africa) T: +27 (0)11 386 9000 F: +27 (0)11 386 9001 [email protected]. T: +27 (0)11 386 …
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About Us – Rietspuit Crushers
Rietspruit Crushers is an established South African mining company that has been in operation since 1960. In that time we have become an industry leader in open cast mining and the crushing of dolerite stone. Rietspruit Crushers is located approximately 9km South of Ermelo, on the N11 toward Amersfoort, on the Farm Rietspruit.
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The geotechnical character of some South African dolerites, …
Doleritic intrusions in Natal and adjoining areas of South Africa are very numerous, and are associated with the break‐up of Gondwana which took place some 187 to 155 million years ago. ... Unfortunately, however, such dolerites cannot be distinguished readily from sound dolerite. As a consequence, several durability tests were undertaken ...
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Rietspuit Crushers – Producers and suppliers of Aggregate …
View Products Rietspruit Crushers predominately supplies aggregate within a 100km ... Rietspruit Crushers is an established South African mining company that has been in operation since 1960. In that time we have become an industry leader in open cast mining and the crushing of dolerite stone. Rietspruit Crushers is located approximately ...
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Aggregates, Concrete Stone, Road Stone, Sand, Gabion
Afrimat's proprietary commercial quarries – located in across South Africa – also supply the majority of raw materials for our concrete products and readymix divisions. Aggregates: Product Supply by Region
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The Camdeboo National Park near Graaf Reinet in the Karoo …
T T ravel tips & planning info . Who to contact . Camdeboo National Park . Tel: +27 (0)49 892 3453 . Email: camdeboo@sanparks . How to get here . The park has 2 entrances. If you want to visit the Valley of Desolation and visit the game-viewing area you will enter via a gate 5km out of Graaff Reinet on the R63 towards Murraysberg.If you are staying over in the park then the …
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Some Variations in Petrography of South African Karoo …
The Karoo Dolerite Suite in South Africa represents the shallow feeder system to the flood basalt eruptions that formed the Drakensberg Group (basalts), approximately 183 Ma, which presently occur as numerous volcanic remnants in the central parts of South Africa, Botswana and Namibia (Duncan et al. 1997).These intrusions are part of an interconnected network that …
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The 200,000-year-old city found in Southern …
In South Africa, about 150 km west of port Maputo, Mozambique, a giant stone city has been discovered. It became possible to determine the age of the site by measuring the erosion rate of the dolerite. The 1500 square kilometer …
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Readying for growth
The B plant produces G products, while the A plant produces the road and concrete stone products, among others. Due to the geological characteristics of the dolerite rock found at PMB Quarry, the operation has …
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The geotechnical character of some South African
This is mainly due to the fact that approximately 57% of the surface lithology in South Africa is of poor road construction quality, rendering the localized Karoo dolerite intrusions the best ...
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The Effect of Dolerite Intrusions on the Hydrocarbon …
Sampled outcrops near Calvinia (Northern Cape, South Africa) showing the highly variable fabric of the Whitehill Formation (1) adjacent to dolerite sills (2).
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The Middle Stone Age of South Africa
The African Middle Stone Age (MSA) is the period in human history spanning roughly from 300,000 until 30,000 years ago. Here, we focus on the archaeological record of South Africa, with occasional glimpses at neighboring countries (Eswatini, Lesotho, Namibia). During this time, modern humans evolved in Africa and brought forth a number of key
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Howards Quarry Meets Much Asphalt Standards With …
High quality dolerite aggregate from B&E International's Howards Quarry at eMalahleni is keeping Much Asphalt's nearby static plant well stocked to produce asphalt for …
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Geochemistry of dolerite intrusions of the southeastern …
The formation of the late Mesozoic Karoo Large Igneous Province (LIP) at ∼190 Ma (or even 210 Ma) to ∼170 Ma (Luttinen et al., 2015, Luttinen et al., 2022, Greber et al., 2020; Morake et al., 2022) is related to the break-up of the supercontinent Gondwana (Duncan et al., 1997).The magmatic products of this LIP can be found throughout southern Africa and extend …
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The Petrographic and Geotechnical Properties of a Dolerite …
South Africa is one of the largest coal producers in the world, where coal mining has been going on a commercial basis since 1857. Whilst in-roads are being made into clean energy, coal remains the primary energy source in South Africa for domestic power generation, and is set to dominate energy demands for the foreseeable future (Hancox and Götz 2014).
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Understanding Durability Problems with Dolerite in Roads in South Africa
Dolerite is one of the most widely used road pavement construction materials in South Africa and is classified as a basic crystalline rock. The variable performance of road pavements constructed with such rocks in South Africa has frequently been linked to the durability of the freshly crushed dolerite which can undergo rapid deterioration in ...
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Landscapes and Landforms of South Africa—An Overview
Most sedimentary rocks in South Africa are products of infilling, such as of the Main Karoo Basin and its subsidiary basins such as the Springbok Flats Basin, Ellisras Basin, Waterberg Basin and Tuli Basin. ... with a dolerite-capped inselberg in the centre ... Goldberg P, Berna F, Miller C (2011) Middle Stone Age bedding construction and ...
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Suitability of Chrome Slag as an Aggregate for Asphalt in South Africa
Approximately 20 million tons have accumulated on Chrome Slag dumps in South Africa, and a further 0.5 million tons are added every year. The total amount of one area (Witbank area) alone is 450 ...
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The clay minerals of South African soils developed from …
plutonic rock (granite) and a basic igneous rock (dolerite) ; both rocks are individually widely spread over South Africa and occur under different climatic conditions. In the first article the soils, derived from granite, will be dealt with. Granite, the parent rock from which the various soils have developed, is an acid
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A large scale investigation into changes in coal quality …
Department of Geology, University of Pretoria, South Africa Mineral Sciences Building, Pretoria 0002, South Africa *Corresponding author. John.bussio@live Highlights •Metamorphic aureoles vary greatly from dolerite to dolerite, and along strike. •The metamorphic effect of dolerites is a combination of metamorphic systems.
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By D. H. van der Merwe
Dolerite is being used extensively in South Africa as a road-building material. In the eastern part of the country it has been found that, where weathered dolerite has been used in the base-course, such roads often fail after a time. In the western part of the country, where weathered dolerite has also been used, no
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Morpho-tectonics and mechanism of emplacement of …
western Karoo, South Africa L. Chevallier Council for Geoscience, P.O. Box 572, Bellville, 7535 Republic of South Africa E-mail: [email protected] A. Woodford* Directorate of Geohydrology, Department of Water Affairs and Forestry, Private Bag X 16, Salamhof, 7532 Republic of South Africa E-mail: awoody@iafrica Accepted 1 December 1998
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Dolerite | PPT
Dolerite exhibits an ophitic texture where plagioclase crystals are surrounded by pyroxene. There are two main types - tholeiitic dolerite and alkali dolerite - which are found in locations like South Africa, Tasmania, Scotland, and England. Dolerite is utilized as a building and construction material. Read less
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Black dimensional stones: geology, technical properties and …
The prices for black dimensional stones on the international market vary from 900 to 2,400 US$/m 3, whereas the Uruguayan dolerites are priced at 900 to 1,700 US$/m 3.Dolerites from China have prices ranging from 1,000 to 2,000 US$/m 3, the South African gabbro/norite shows prices up to 2,000 US$/m 3 and the most expensive black stone is the iridescent norite …
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Quality dolerite no problem for Howards Quarry
High quality dolerite aggregate from B&E International's Howards Quarry at eMalahleni is keeping Much Asphalt's nearby static plant well stocked to produce asphalt for the N4 highway project and developments as far as …
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