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Fluid inclusions in hydrothermal quartz in the 2.4 Ga Ongeluk Formation, South Africa, are expected to partially retain a component of the ancient seawater. To constrain the origin of the fluid and the quartz precipitation age, we conducted Ar–Ar dating for the quartz via a stepwise crushing method. ... The sliced quartz samples were crushed ...
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Stones collected at KwaHlathi near Ladysmith, where scores of people have been digging for what they believe to be diamonds, have turned out to be quartz crystals.
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The hopes of thousands who rushed to a rural South African village last week in search of diamonds have been crushed, after government officials said Sunday that the stones were only quartz, which ...
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limiting factor in exploitation of nepheline syenite in South Africa is the iron content, percentage of dark minerals and the location of the deposit in terms of its market. The location of the deposit is an issue for all industrial minerals; being closer to Gauteng, which is the principal market, is most advantageous. 1.1.
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Gold production in South Africa is projected to continue its decline in future, and prospects for discovery of new high-grade deposits are limited. Many of the mining companies have resorted to mining and processing low-grade and complex gold ores. Such ores are technically challenging to process, which results in low recovery rates, excessive reagent …
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Ashmole, I. (2004) "Dimension Stone: The Small Scale Mining Potential in South Africa", Paper presented at Small Scale Mining 2004, Johannesburg, 9 September 2004. Dimension stone: U.S. Bureau of ...
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Single-pass grinding tests were performed on the 80 kg ore with Kö ppern HPGR (250 cm diameter) followed by screening to the desired particle size of (À 5.6/+ 4) mm at 90 kbar.
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M EP171X /0 01. . . . . . . . . . . 1 1 S T U D Y U N I T 1 1 Physical geology L E A R N I N G O U T C O M E S On completion of this study unit, you should be able to do the following: • Define the term PHYSICAL GEOLOGY • Identify and describe the natural forces that change the surface structure of t earth • Describe the effects of temperature on the crust • Describe the effects of ...
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AUSTRALASIAN HISTORICAL ARCHAEOLOGY, 27, 2009 "A thousand fine vessels are ploughing the main …" 1 Archaeological traces of the nineteenth-century 'Guano Rage' on the south-western coast of Africa JILL KINAHAN …
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0 A. Glacially crushed subangular quartz particle from DRI3-3 loess (Illinoian, Saale) showing extensive older (0) and younger (y) linear and conchoidal crushing features. 0 B. Enlargement of ...
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The Department of Mineral Resources and Energy (DMRE) through its Small-Scale Mining Directorate promotes Small-Scale Mining (SSM) activities in South Africa. The …
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Within the crystalline quartz assemblage two main categories can be distinguished and both were exploited in the HP layers of Sibudu : vein quartz (milky or xenomorph) and crystal quartz (also called hyaline or automorph quartz) [57, 58].
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THE SECOND AUSIMM INTERNATIONAL GEOMETALLURGY CONFERENCE / BRISBANE, QLD, 30 SEPTEMBER - 2 OCTOBER 2013 G NWAILA et al 76 low-grade copper, gold, silver and uranium ores and has
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(01) Crushed Rocks and Dimension Stone: Exploration, Evaluation and Exploitation in parts of Igarra Area, Southwestern Nigeria N. Egesi1, J. I. Nwosu1 1Department of Geology, Faculty of Science, University of Port Harcourt, Port Harcourt, Nigeria
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The aim of this research is to enhance mitigation measures in quartz ore exploration common in the Serra do Espinhaço Meridional region through the specific study of …
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