Precious Metal Sampling at the Ohaaki Geothermal Field

Authors: Brown K.L., Webster J.G. and Christenson B.W.
Conference: New Zealand Geothermal Workshop Session: Geochemistry
Year: 1996 Language: English
Geo Location:
Abstract: A special downhole sampler has been built to sample for precious metals in deep geothermal reservoirs. During the February 1996 shutdown period, samples were collected from two wells at the Ohaaki geothermal field. In the deep geothermal reservoir, gold concentrations of 0.5 - 1.16 ppb and silver concentrations of 5.7 -18.0 ppb were found. These results agree with previous approximate estimates of the gold and silver concentrations from surface derived measurements.
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