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Name
D. Chappell
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UNKNOWN
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Publications

  • Surface run-off from mineralised road aggregate, Puhipuhi, Northland, New Zealand

    Authors
    Dave Craw, D. Chappell, A. Black
    Journal
    New Zealand Journal of Marine and Freshwater Research
    Year
    2002
    Roads in the Puhipuhi area of Northland, New Zealand, have been surfaced with road aggregate derived from hydrothermally mineralised rocks, which contain iron sulphides (pyrite and marcasite). Oxidati... REGISTER NOW TO SEE MORE

  • Environmental mercury and arsenic sources in fossil hydrothermal systems, Northland, New Zealand

    Authors
    Dave Craw, D. Chappell, A. Reay
    Journal
    Environmental Geology
    Year
    2000
    Northland, New Zealand has been affected by natural hot water spring systems depositing elevated concentrations of mercury and arsenic over the past 5 million years. Due to the different erosion level... REGISTER NOW TO SEE MORE

  • Mobilisation and attenuation of arsenic around gold mines, east Otago, New Zealand

    Authors
    Dave Craw, D. Chappell, A. Reay, D. Walls
    Journal
    New Zealand Journal of Geology and Geophysics
    Year
    2000
    Arsenic is released into the environment by decomposition of natural arsenopyrite in gold-bearing veins in east Otago. Natural release is slow, but is accelerated by mining activity. Waters from old m... REGISTER NOW TO SEE MORE

  • Consolidation and incipient oxidation of alkaline arsenopyrite-bearing mine tailings, Macraes Mine, New Zealand

    Authors
    Dave Craw, D. Chappell, M. Nelson, M. Walrond
    Journal
    Applied Geochemistry
    Year
    1999
    Fine grained (ca. 15 ?m), arsenopyrite-bearing mine tailings have been exposed to drying and oxidation for 4 a pending relocation. The tailings are still partly covered by a pond of decanted pore wate... REGISTER NOW TO SEE MORE