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Oolitic iron formations in Northern Australia

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Summary

Recent exploration in northern Australia has discovered three shallow water oolitic iron formations, one of Permian age, and two of Upper Proterozoic age. The Permian formation resembles the oxidized oolitic chamositic formations of south-eastern England, but contains more detrital quartz and felspar.

The two Precambrian iron formations, consist, below the zone of weathering, of oolites of hematite and of a chamosite-like substance, in a siderite cement, together with well-rounded quartz grains, and are interlayered with sandstones with a chamosite-like cement. Within the zone of weathering the siderite and chamosite are more or less completely replaced by quartz, but with preservation in detail of original textures.

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References

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Authors and Affiliations

  1. Mineragraphic Investigations, CSIRO, Melbourne

    A. B. Edwards (Officer-in-Charge)

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  1. A. B. Edwards
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Published by permission of the Commonwealth Scientific and Industrial Research Organization (CSIRO).

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Edwards, A.B. Oolitic iron formations in Northern Australia. Geol Rundsch 47, 668–682 (1959). https://doi.org/10.1007/BF01800680

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  • DOI: https://doi.org/10.1007/BF01800680

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