Geochemical prospecting for uranium in the Lower Buller Gorge, New Zealand

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Abstract
One hundred and fifty-six water samples from 17 localities in the Lower Buller Gorge were analysed for uranium. The uranium content of surface waters was found to vary significantly with weather conditions, the peak uranium concentration occurring shortly after the onset of heavy rain following a dry period. The method appears to be applicable for the identification of discrete areas that are comparatively rich in overall uranium content. Detection of localized concentrations of uranium is dependent on the presence of a small stream draining the critical area. The method has little practical application in the Lower Buller Gorge area, where prospecting with a scintillometer is much simpler and more effective.

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