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What is a âbrownfieldâ? The Environmental Protection Agency (EPA) defines a brownfield as real property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.
and enhancing vectoring capabilities. Conventional geochemistry remains very important to gold exploration, while promising new techniques are being tested. Selection of the appropriate exploration methods must be dictated by the characteristics of the targeted model, its geologic setting, and the surficial environment. Both greenfield and brownfield exploration contributed to the discovery of. major gold deposits (>2.5 moz Au) in the last decade but the discovery rates have declined significantly.