The copper deposits of Moke Creek, West Otago

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Abstract
Two parallel copper-bearing formations are present in the schists of the Moke Creek district, 12 miles north of Queenstown. Most previous observers have reported unfavourably on the value of the deposits, but have given little factual information; few details of past prospecting are now available. The deposits consist of thin laminae of pyrite, pyrrhotite, chalcopyrite, and other sulphides, interlaminated in green schist. They are pre-metamorphic and were probably derived from a submarine volcanic source. Two or three laminae are commonly present and have a total average thickness of about 8 in. On present exposures the quantity of sulphide is estimated at 50,000 tons, and the copper percentage at 10-12 percent. At mining widths the product would have a little over 2 percent copper. These are considered to be conservative estimates, and refer to only one part of the deposits. Other parts undoubtedly contain greater quantities but no estimates can be given. Suggestions are offered for further exploration.

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