A review of the geology and geodynamic evolution of the Palaeoproterozoic Earaheedy Basin, Western Australia

Franco Pirajno, R.M. Hocking, S.M. Reddy, A.J. Jones

    Research output: Contribution to journalLiterature review

    32 Citations (Scopus)

    Abstract

    The Palaeoproterozoic Earaheedy Basin is one of a series of basins that extend for about 700 km east–west and are part of the Capricorn Orogen, situated between the Archaean Pilbara and Yilgarn Cratons. The Earaheedy Basin contains sedimentary rocks that were deposited on the northern passive continental margin of the Yilgarn Craton, probably as a result of continental breakup at 1.8 Ga. The sedimentary rocks of the Earaheedy Group are divided into two Subgroups, Toloo and Miningarra, each representing different depositional environments and aggregating about 3000 m in thickeness. The Tooloo Subgroup consists of basal siliciclastic rocks with minor platform carbonates, overlain by a 600-m-thick succession of Fe-rich rocks (granular iron-formation and hematitic shales). The Miningarra Subgroup is predominantly siliciclastic, but includes stromatolite-bearing carbonate sequences and was deposited during a more active depositional regime. Far-field tectonic events at 1.76 and 1.65 Ga resulted in the deformation of the sedimentary package with progressive intensity from north to south, forming the Stanley Fold Belt and giving an overall asymmetric structure to the Basin. These events were followed by a large meteorite impact (Shoemaker Impact Structure), probably in the Neoproterozoic. The Earaheedy Basin is well endowed with Fe resources, represented by the granular iron-formation (Frere Formation, Tooloo Subgroup), particularly in the Stanley Fold Belt, where there was secondary enrichment.

    Original languageEnglish
    Pages (from-to)39-77
    JournalEarth-Science Reviews
    Volume94
    Issue number1-4
    DOIs
    Publication statusPublished - May 2009

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    geodynamics
    geology
    basin
    fold belt
    craton
    sedimentary rock
    stromatolite
    iron
    continental breakup
    impact structure
    carbonate platform
    depositional environment
    rock
    meteorite
    continental margin
    Archean
    carbonate
    tectonics
    resource

    Cite this

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    abstract = "The Palaeoproterozoic Earaheedy Basin is one of a series of basins that extend for about 700 km east–west and are part of the Capricorn Orogen, situated between the Archaean Pilbara and Yilgarn Cratons. The Earaheedy Basin contains sedimentary rocks that were deposited on the northern passive continental margin of the Yilgarn Craton, probably as a result of continental breakup at 1.8 Ga. The sedimentary rocks of the Earaheedy Group are divided into two Subgroups, Toloo and Miningarra, each representing different depositional environments and aggregating about 3000 m in thickeness. The Tooloo Subgroup consists of basal siliciclastic rocks with minor platform carbonates, overlain by a 600-m-thick succession of Fe-rich rocks (granular iron-formation and hematitic shales). The Miningarra Subgroup is predominantly siliciclastic, but includes stromatolite-bearing carbonate sequences and was deposited during a more active depositional regime. Far-field tectonic events at 1.76 and 1.65 Ga resulted in the deformation of the sedimentary package with progressive intensity from north to south, forming the Stanley Fold Belt and giving an overall asymmetric structure to the Basin. These events were followed by a large meteorite impact (Shoemaker Impact Structure), probably in the Neoproterozoic. The Earaheedy Basin is well endowed with Fe resources, represented by the granular iron-formation (Frere Formation, Tooloo Subgroup), particularly in the Stanley Fold Belt, where there was secondary enrichment.",
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    A review of the geology and geodynamic evolution of the Palaeoproterozoic Earaheedy Basin, Western Australia. / Pirajno, Franco; Hocking, R.M.; Reddy, S.M.; Jones, A.J.

    In: Earth-Science Reviews, Vol. 94, No. 1-4, 05.2009, p. 39-77.

    Research output: Contribution to journalLiterature review

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    AU - Pirajno, Franco

    AU - Hocking, R.M.

    AU - Reddy, S.M.

    AU - Jones, A.J.

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