The Nature of the Witwatersrand Gold-Uranium Deposits

Pretorius, D. A.

doi:10.1016/b978-0-444-41407-6.50005-2

Cited by 41 publications

(41 citation statements)

References 2 publications

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“…Within conglomeratic zones, in both areas, individual conglomerate layers are lenticular and elongated parallel to the paleoslope (Armstrong, 1968;Reinecke, 1927;Pienaar, 1963;. This distribution suggests that the conglomerates represent gravels which accumulated in channels and bars of a braided river system (Pretorius, 1976b).…”

mentioning

confidence: 92%

“…This aspect of the Witwatersrand controversy was summarized by Pretorius (1975) This model is summarized by Pretorius (1976aPretorius ( , 1976b and will be discussed in a later section.…”

Section: Genetic Concepts History Of Explorationmentioning

confidence: 99%

“…A more detailed discussion of these papers is presented in a later section. Pretorius (1976aPretorius ( , 1976b viewed the Witwatersrand basin as a large, intermontane lake or inland sea bordered on the north and west by tectonically active highlands. Clastic material was carried into the basin by major river systems which flowed through deep canyons in the Archean source terrain, across a relatively short piedmont plain, and then into the basin.…”

Section: Stratification Sequences--pretorius (1976b) Describes Finingmentioning

confidence: 99%

“…Lithology--The conglomerates are bimodal sediments which consist of a pebble fraction (t 80 percent by weight) consisting of quartz and chert pebbles and a matrix fraction consisting of poorly sorted, mature to submature sand with relatively large amounts of clay or mica, and heavy minerals (Viljoen, 1963;Pretorius, 1976b;Pienaar, 1963;. The conglomerates are interlayered with poorly sorted, submature subarkoses which are less mature than the matrix sands of the conglomerates (Minter, 1976; Pretorius (1975Pretorius ( , 1976aPretorius ( , 1976b, which are very briefly summarized here. A more detailed discussion of these papers is presented in a later section.…”

Section: Stratification Sequences--pretorius (1976b) Describes Finingmentioning

confidence: 99%

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Precambrian uranium-bearing quartz-pebble conglomerates: exploration model and United States resource potential

Houston¹,

Karlstrom²

1979

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mentioning

confidence: 92%

“…This aspect of the Witwatersrand controversy was summarized by Pretorius (1975) This model is summarized by Pretorius (1976aPretorius ( , 1976b and will be discussed in a later section.…”

Section: Genetic Concepts History Of Explorationmentioning

confidence: 99%

Section: Stratification Sequences--pretorius (1976b) Describes Finingmentioning

confidence: 99%

Section: Stratification Sequences--pretorius (1976b) Describes Finingmentioning

confidence: 99%

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Precambrian uranium-bearing quartz-pebble conglomerates: exploration model and United States resource potential

Houston¹,

Karlstrom²

1979

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“…The Ni and Co are concentrated in a mineral belonging to the linnaeite-group and the Co also in pyrite. For the sake of comparison it may be noted that the gold content of the quartz-carbonate rocks associated with the gold ore in the Kerr Addison Mine is 0.021 ppm (Tihor and Crocket 1977), and that of the gold deposits of Witwatersrand about 10 ppm (Pretorius 1976), making the Kittilä marbles possible targets for gold prospecting.…”

Section: Geochemistry Of the Chromian Marble And The Adjoining Rocksmentioning

confidence: 99%

The chromian marbles of Kittilä, Finnish Lapland

Pekkala¹,

Puustinen²

1978

Bull Geol Soc Finland

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The volcano-sedimentary rock association at Kittilä is characterized in many places by the presence of green-colored fuchsite-bearing ferroan dolomite-quartz rocks, locally called chromian marbles. The rock is cut by coarse-grained quartz-breunnerite veins. The surrounding country rock is a carbonate rock in which fuchsite has been replaced by chlorite or sericite. As the amount of the carbonates decreases, the rock grades into a quartz-sericite rock and eventually into a chlorite schist. These carbonate rocks have originated as chert-carbonate sediments.

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Terrigenous Clastic Depositional Systems

Galloway¹,

Hobday²

1996

250

103

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Library of Congress Cataloging-in-Publication Data. Galloway. William E. Terrigenous clastic depositional systems: applications to fossil fuel and groundwater resources/William E. Galloway, David K. Hobday. -2nd completely rev .. updated, and enl. ed. p. cm. Includes bibliographical references (p. 445-484) and index. ISBN 0-387-60232-1 (hardcover).-ISBN 3-540-60232-1 (hardcover) 1. Sedimentation and deposition. 1. Hobday, David K. II. Title. QE571. G27 1996 553.2 -dc20 95-47132 This work isThe use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: Springer-Verlag. E. Kirchner Typesetting: Best-set Typesetter Ltd., Hong Kong SPIN: 10509771 32/3136/SPS -5 4 3 2 1 0 -Printed on acid-free paper Preface to the Second EditionNonrenewable energy resources, comprising fossil fuels and uranium, are not randomly distributed within the Earth's crust. They formed in response to a complex array of geologic controls, notably the genesis of the sedimentary rocks that host most commercial energy resources. It is this genetic relationship between economic resources and environment that forms the basis for this book. Our grouping of petroleum, coal, uranium, and ground water may appear to be incongruous or artificial. But our basic premise is that these ostensibly disparate resources share common genetic attributes and that the sedimentological principles governing their natural distributions and influencing their recovery are fundamentally similar. Our combined careers have focused on these four resources, and our experiences in projects worldwide reveal that certain recurring geologic factors are important in controlling the distribution of commercial accumulations and subsurface fluid flow. These critical factors include the shape and stability of the receiving basin, the major depositional elements and their internal detail, and the modifications during burial that are brought about in these sediments by pressure, circulating fluids, heating, and chemical reaction.Since the first edition of this book in 1983, there has been a quantum leap in the volume of literature devoted to genetic stratigraphy and refinement of sedimentological principles and a commensurate increase in the application of these concepts to resource exploration and development. Two wholly new chapters, 11 and 16, have been added to accommodate these advances, two chapters (7 and 8) have been completely rewritten, and Chapters 3, 6, 9, 10, and 13 have been substantially revised.We review the spectrum of terrigenous (land-derived or siliciclastic as opposed to in-place or biochemical) clastic depositional systems and their component genetic facies, with emphasis on subsurface as well as field recognition. These range from the most proximal, subaerial, and generally coarse-grained alluvial-fan systems through fluvial, deltaic, shore-zone, ...

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The Nature of the Witwatersrand Gold-Uranium Deposits

Cited by 41 publications

References 2 publications

Precambrian uranium-bearing quartz-pebble conglomerates: exploration model and United States resource potential

Precambrian uranium-bearing quartz-pebble conglomerates: exploration model and United States resource potential

The chromian marbles of Kittilä, Finnish Lapland

Terrigenous Clastic Depositional Systems

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