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  • Epithermal Au-Ag and related deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand

    Authors
    Stuart F. Simmons, J.L. Mauk, A.B. Christie, M.P. Simpson, R.L. Brathwaite
    Journal
    Economic Geology
    Year
    2007
    Epithermal Au-Ag vein deposits of the Hauraki goldfield in the Coromandel volcanic zone, New Zealand, produced 320,000 kg Au and 1.5 million kg Ag between 1862 and 2006 from a total land area of appro... REGISTER NOW TO SEE MORE

  • Whole-rock geochemical techniques for evaluating hydrothermal alteration, mass changes, and compositional gradients associated with epithermal Au-Ag mineralization

    Authors
    Stuart F. Simmons, J.L. Mauk, I. Warren
    Journal
    Economic Geology
    Year
    2007
    Volcanic rocks hosting quartz ± calcite ± adularia ± illite epithermal deposits undergo elemental mass changes associated with K metasomatism, K-H metasomatism, and H metasomatism that are developed p... REGISTER NOW TO SEE MORE

  • Sources of metals and fluids in orogenic gold deposits: Insights from the Otago and Alpine schists, New Zealand

    Authors
    Dave Craw, I.K. Pitcairn, D.A.H. Teagle, G.R. Olivo, R. Kerrich, T.S. Brewer
    Journal
    Economic Geology
    Year
    2006
    The Otago and Alpine schists of the South Island of New Zealand form a young (lt;200 Ma), lithologically monotonous, metasedimentary belt with exposures ranging from unmetamorphosed graywackes to amph... REGISTER NOW TO SEE MORE

  • Tectonic controls on gold deposits and their environmental impact, New Zealand

    Authors
    Dave Craw
    Journal
    Journal of Geochemical Exploration
    Year
    2001
    New Zealand is an active orogenic belt which varies along its length from continental collision to continent-ocean subduction tectonics. Mesothermal gold deposits, with rare mercury, have formed in co... REGISTER NOW TO SEE MORE

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