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Book Chapter

Uranium: Syngenetic to Dlagenetic Deposits in Foreland Basins

By
J. B. Maynard
J. B. Maynard
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Published:
January 01, 1991

Abstract

Uranium occurs in a wide variety of types of ore deposits, most of them sedimentary. Table 15.1 lists the types reported to possess significant reserves. Olympic Dam and Athabasca-type deposits are thought to have formed by hydrothermal processes and so fall mostly outside the scope of this discussion. The processes of formation of paleoplacer deposits such as those of Elliot Lake or the Witwatersrand will be discussed in Chapter 9 on placer mineralization; in this chapter their chemistry will be compared to that of other U deposits. Uraniferous black shale deposits are as yet uneconomic; they are discussed in Chapter 13 under metalliferous shales.

Uranium deposits show a relationship of age to type of deposit (Fig. 15.1). Robertson et al. (1978) and many other authors have argued that this time distribution reflects the evolution of the earth's atmosphere from low oxygen to high oxygen, with the period of most rapid increase concentrated between 2.5 and 2.0 Ga. Such a change has some implications for basin analysis of Archean sedimentary rocks and the ores they contain.

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Contents

Reviews in Economic Geology

Sedimentary and Diagenetic Mineral Deposits: A Basin Analysis Approach to Exploration

Eric R. Force
Eric R. Force
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J. James Eidel
J. James Eidel
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J. Barry Maynard
J. Barry Maynard
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Society of Economic Geologists
Volume
5
ISBN electronic:
9781629490120
Publication date:
January 01, 1991

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