Abstract

Abstract This paper discusses the distribution of mercury in four kinds of uranium deposits and the form of the corresponding soil-gas mercury haloes. Uranium deposits can be divided into three levels according to their mercury contents. Carbonatite-type uranium deposits are often associated with high levels of mercury, which forms large, high-concentration and high-contrast soil-gas haloes in residual alluvium. Mercury concentration goes up with increasing sampling depths and has been used successfully to locate deep uranium orebodies around siliceous limestone-hosted uranium deposits.

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