Recognition of aeolian soils of the Blayney district, NSW: Implications for mineral exploration

Bruce L. Dickson*, Keith M. Scott

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)

    Abstract

    Aeolian soils in the Blayney district are characterised by having approximately 80% of their mass finer than 63 μm, Ti/Zr ratios of approximately 12, radioelement contents of 0.7% K, 2 ppm eU and 11 ppm eTh and a position high in the landscape. Their Ti/Zr ratio and abundant quartz content distinguishes them from soils derived from Tertiary basalts, which share some of the other characteristics. Many soils in the district have a partial aeolian contribution, which can be recognised by a Ti/Zr ratio that differs from that of the underlying rock. Abundance of an aeolian contribution suggests that airborne radiometric surveys should be very carefully interpreted. Ground studies suggest that high Th content in soils contrasted with low Th in adjacent rocks can be indicative of an aeolian contribution in soils. A substantial amount of fine material in a soil can also significantly dilute geochemical signatures if -63 μm (<80 mesh) samples are used for soil surveys during exploration.

    Original languageEnglish
    Pages (from-to)237-251
    Number of pages15
    JournalJournal of Geochemical Exploration
    Volume63
    Issue number3
    DOIs
    Publication statusPublished - Oct 1998

    Keywords

    • Aeolian
    • Australia
    • Blayney
    • Exploration
    • Gamma-ray
    • Geochemistry
    • Soils

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