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The Proterozoic Kimberley Reef placer in the Evander goldfield, Witwatersrand, South Africa (Monograph series on mineral deposits) epub

by Wolfgang Hirdes


The Proterozoic Kimberley Reef placer in the Evander goldfield, Witwatersrand, South Africa (Monograph series on mineral deposits) epub

ISBN: 3443120202

ISBN13: 978-3443120207

Author: Wolfgang Hirdes

Category: Reference

Subcategory: Foreign Language Study & Reference

Language: English

Publisher: Borntraeger (1983)

Pages: 100 pages

ePUB book: 1145 kb

FB2 book: 1910 kb

Rating: 4.8

Votes: 373

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Monograph Series on Mineral Deposits srand, South Africa. Monograph Series on Mineral Deposits, Number 20). ISBN 978-3-443-12020-7, paperback, price: 4. 0 €.

Monograph Series on Mineral Deposits srand, South Africa. EnglishEN FrançaisFR DeutschDE. Wolfgang Hirdes; Rudolf Saager: The Proterozoic Kimberley Reef Placer in the Evander Goldfield Witwatersrand, South Africa. in stock and ready to ship.

The Kimberley Reef is a Proterozoic gold-uranium placer which was deposited in the Witwatersrand basin approximately . 109 years ago. The present study investigates and compares the silver contents of individual gold grains ( true fineness) on a regional scale in th. . The present study investigates and compares the silver contents of individual gold grains ( true fineness) on a regional scale in the Kimberley Reef of the East Rand goldfield. Two distinctly different populations of gold particles can be delineated by means of geostatistical procedures

Hirdes W (1979) The Proterozoic gold-uranium Kimberley Reef placers in the Evander and East Rand Goldfields Witwatersrand, South Africa .

Hirdes W (1979) The Proterozoic gold-uranium Kimberley Reef placers in the Evander and East Rand Goldfields Witwatersrand, South Africa: different facies and their source area aspects. University of Heidelberg, Germany, 199pGoogle Scholar. Hirdes W, Saager R (1983) The Proterozoic Kimberley Reef placer in the Evander Goldfields, Witwatersrand, South Africa. Monograph Series on Mineral Deposits 20, Gebrudewr Borntraeger, 101pGoogle Scholar. Hoefs J, Nielsen H, Schidlowski M (1968) Sulfur isotope abundances in pyrite from the Witwatersrand Conglomerates.

In book: Monograph Series on Mineral Depopsits, Publisher: Verlag . Thus the Witwatersrand uraninite composition corresponds to that of the high-temperature metamorphic and magmatic types.

In book: Monograph Series on Mineral Depopsits, Publisher: Verlag Bornträger, p. 29-142. Cite this publication. samples SVR3, VVR39) and generally by the Main Reef and Kimberley Reef. Evidence of partial remobilisation of U exists in the form of secondary U–Ti-phases, mainly brannerite and uraniferous leucoxene, subordinately as secondary uraninite, which occur as small euhedral grains or minute fills along microfractures, or as microcrystalline aggregates (Ramdohr, 1958; Schidlowski, 1981; Oberthür, 1987; Depiné et a. 2013).

Hirdes, W. and Saager, R. (1983) The Proterozoic Kimberley Reef Placer in the Evander Goldfield, Witwatersrand, South Africa

Hirdes, W. (1983) The Proterozoic Kimberley Reef Placer in the Evander Goldfield, Witwatersrand, South Africa. Monograph Series on Mineral Deposits, GeBruder Borntraeger, Berlin, 20, 100 pp. Holland, T. J. B. and Powell, R. (1990) An enlarged and updated internally consistent thermodynamic dataset with uncertainties and correlations: the system 2-SiO2-C-H2-O2

Pre-Witwatersrand and Witwatersrand conglomerates in South Africa; a mineralogical . Impact-related hydrothermal alteration of Witwatersrand gold reefs in the Vredefort Dome and Witwatersrand goldfields, South Africa.

Pre-Witwatersrand and Witwatersrand conglomerates in South Africa; a mineralogical comparison and bearings on the genesis of gold-uranium placers. Pages 38-56 1982, 1982. Meteoritics and Planetary Science 34(4, Suppl, 1999. Lead Isotopic Compositions of Galenas and of Primary and Detrital Pyrites from the Swaziland and Witwatersrand Sequences of South Africa, and their Bearing on the Origin of the Witwatersrand Gold. Fortschritte der Mineralogie 50: 91-93, 1973.

The Witwatersrand (locally the Rand or, less commonly, the Reef) is a 56-kilometre-long (35 mi), north-facing scarp in South Africa. This east-west-running scarp can be traced with only one short gap, from Bedfordview (about 10 km west of .

Introduction The gold fields of the Witwatersrand Basin in South Africa are . The placer model proposes the gold deposited by an ancient river systems that eroded it from surrounding greenstone belts.

Introduction The gold fields of the Witwatersrand Basin in South Africa are, by a landslide, the largest single gold producing district in the world. Layers of sedimentary rock in the Witwatersrand show that is was once a shallow sea. This sea was formed approximately 3 billion years ago after the collision between the Zimbabwe and Kaapvaal cratons. Ancient river systems feeding into the basin eroded the surrounding highlands and over a period of about 260 million years, deposited layers of quartz pebble conglomerates, sandstones and shales.

The Witwatersrand Gold Rush was a gold rush in 1886 that led to the establishment of Johannesburg, South Africa. It was a key part of the Mineral Revolution. There had always been rumours of a modern-day "El Dorado" in the folklore of the native tribes that roamed the plains of the South African highveld and in that of the gold miners who had come from all over the world to seek out their fortunes on the alluvial mines of Barberton and Pilgrim's Rest, in what is now known as the province of Mpumalanga.

Discovery of the Witwatersrand goldfields in the 1880s and the recognition .

Discovery of the Witwatersrand goldfields in the 1880s and the recognition of the importance of the Central African Copperbelt in the early part of the 20th century reinforced the view that Africa was a treasure house of mineral wealth and was underexplored-a view that still prevails today (2016) with a very considerable number of exploration and mining companies active throughout. Uranium mineralization also occurs in the Karoo Basin of South Africa (Turner, 1985), with Stapleton (1978) proposing an important role for organic matter.

Monograqph on Mineral Deposits number 20 with 13 balck and white plates with multiple photos on each plate has a bibliography and index and seveal graphs and tables.