• ORE DEPOSITS 101 - Part 8 - Witwatersrand Gold - YouTube

    The Reef Group is comprised of coarse quartz conglomerate horizons measuring up to 1.5m thick and containing numerous sulphides, gold and the uranium mineral uranite. Ore body geometry of the Reef Group is classified as continuous through the West Rand Goldfield.

  • Witwatersrand Basin (RSA)

    viability of optical sorting of Witwatersrand type conglomerate ores. The first case study deals with recovering gold reef from surface rock dumps (SRD) at Kloof Gold Mine. Over a period from 2003 to 2010 various test work campaigns and pilot plant work was carried out proving both the technical and economic viability of optical sorting.

  • Witwatersrand Gold Deposits

    textures of ore and rocks also are observed in some Chinese sedimentary rock-hosted gold deposits (figs. 23, and 24). Short-axial anticlines—defined as folds with a length in the axial direction roughly equal to its limb widths—are common and important ore-controlling structures in the Dian-Qian-Gui area (fig. 15). Almost all Carlin-type

  • GEOLOGY OF SEDIMENTARY ROCK-HOSTED GOLD DEPOSITS

    The Black Reef Formation is a laterally extensive sedimentary succession at the base of the Transvaal Supergroup. The quartz-pebble conglomerates host erratic concentrations of gold and uranium; however, in areas that are located spatially above the gold and uranium-bearing reefs of the Witwatersrand Supergroup, the concentrations can reach ore-grade.

  • GoldinSouthAfrica - SAIMM

    Apr 20, 2017· The formation of gold deposits in South Africa by Helmholtz Association of German Research Centres The left picture shows uraninite (uranium ore) that surrounds gold.

  • The Origin of the Gold and Uranium Ores of the Black Reef ...

    Reef BlackReef KimberleyReef KimberleyReef Klerksdorp West Wits Line Main Kimberley Elsburg WestRand Main CentralRand Elsburg Main EastRandandHeidel-berg Kimberley Main Kimberley SouthRand Evander Kimberley Kimberley TheVentersdorp Contact Reef,strictlyamemberof theVentersdorp Supergroup, issignificantlyenrichedin

  • Gold Deposit Classification: List of 10 Types of Gold Deposits

    Peak gold production occured in 1970 when over 1000 metric tommes were mined, generating US $1,164 billion in sales, however gold production has declined since 1980. The average recovery grade of the Witwatersrand gold mines has declined from 13,28 grammes/tonne in 1970 to 5,3 grammes/tonne in 1991. 2 Minerals:

  • gold reef stone crusher | Mobile Crushers all over the World

    The Witwatersrand deposits have produced almost 40% of all the gold produced on earth since beginning of time over 1.5 billion with a B ounces that’s the equivalent of 305 million ounce deposits if there’s one area of agreement on the Witwatersrand gold deposits is that they are truly world class solid gold …

  • Cyanidation of reef and surface gold ores

    A study on the scientific journal Precambrian Research was recently published by researcher Sebastian Fuchs from the GEOMAR–Helmholtz Centre of Ocean Research Kiel (Germany) and his coworkers. This study gives an explanation for the formation of uranium and gold ore related to fossil hydrocarbons in the Witwatersrand basin.

  • The formation of gold deposits in South Africa

    Cyanidation of reef and surface gold ores the reef ore sample, the mini-jaw crusher was washed and subsequently flushed with 5 kg of the collected sample. The surface ore enters the plant at a particle size -150 mm and can be easily handled. Both the reef ore sample and surface ore sample were dried and pulverized to 80 per cent passing

  • Witwatersrand Basin Project – WEST WITS MINING

    The Witwatersrand Basin is a largely underground geological formation which surfaces in the Witwatersrand, South Africa.It holds the world's largest known gold reserves and has produced over 1.5 billion ounces (over 40,000 metric tons), which represents about 50% of all the gold ever mined on earth. The basin straddles the old provinces of Transvaal and the Orange Free State, and consists of a ...

  • ECONOMIC GEOLOGY RESEARCH INSTITUTE - Wits University

    Excitement as ‘Wits-style’ gold is discovered in iron-ore hub, but geologist urges caution. ... he points out that the clasts in the reef conglomerates of the Central Rand Group mainly ...

  • BENEFICIATION OF WITWATERSRAND TYPE GOLD ORES BY …

    Jul 07, 2017· Description

  • Excitement as ‘Wits-style’ gold is discovered in iron-ore ...

    This is a spectacular sample of Precambrian high-grade gold ore from South Africa's Blyvooruitzicht Gold Mine. The rock is from the Carbon Leader (also known as the Carbon Leader Reef & Carbon Leader Seam), a blackened, hydrocarbon-rich stromatolitic interval richly impregnated with native gold (Au) and radioactive uraninite/pitchblende (UO 2 ...

  • The origin of the gold and uranium ores of the Black Reef ...

    (Economic Geology Research Institute, School of Geosciences, ... P.O. Wits 2050, Johannesburg, South Africa) ECONOMIC GEOLOGY RESEARCH INSTITUTE INFORMATION CIRCULAR No. 375 December, 2003 . LOUIS DE LAUNAY AND THE DEBATE ON THE ORIGIN ... on the formation of the gold ores. He classified the ore genetic theories into three types: (1)

  • www.jsjgeology.net

    Gold Ore (Ventersdorp Contact Reef, Mponeng (West Wits) Mine, Witwatersrand Basin, South Africa . CERTIFIED REFERENCE MATERIAL . OREAS 293 . Table 1. Certified Values and Performance Gates for OREAS 293. Constituent Certified Absolute Standard Deviations Relative Standard Deviations 5% window Value 1SD 2SD Low 2SD High 3SD

  • Lesson 1 - Where Does Gold Come From? Technical Level: Basic

    The Origin of the Gold and Uranium Ores of the Black Reef Formation, Transvaal Supergroup, South Africa Article in Ore Geology Reviews 72:149-164 · January …

  • Gold Ore (Ventersdorp Contact Reef, Mponeng (West Wits ...

    The Extractive Metallurgy of Gold Gold Deposits Types: List of 10 Gold Deposit Class #1 Pegmatites are igneous rocks formed in the final stage of magma crystallization Porphyry Dyke Coarse-grained granite Albitite Gold Deposit Class #2 Carbonatite Carbonatite Related Gold Deposit Class #3 Auriferous Gold Skarn Type Deposit Gold Deposit Class #4 ...

  • Visualizing the Formation of Uranium and Gold Ore Related ...

    Jul 26, 2015· A brief but comprehensive description of how gold ore bodies form and the differences between placer and hard rock gold deposit. For the latest theories in understandable detail: Gold Bearing ...

  • Witwatersrand - Wikipedia

    gold reef stone crusher. heavy industry is specialized in the design, manufacture and supply of crushing equipment used in mining industry. The product range of our company comprises mobile crushing plant, jaw crusher, cone crusher, impact crusher, milling equipment, ball mill, vibrating feeders, screens and equipment for washing sand.