Titlebook: Macraes Orogenic Gold Deposit (New Zealand); Origin and Developme Dave Craw,Doug MacKenzie Book 2016 The Author(s) 2016 Gold Mining.Tungste

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barium-study

Geochemistry of the Macraes Gold Deposit,stantially. Sulphur was introduced during mineralisation as well, but some unmineralised protoliths have locally-elevated sulphur in metamorphic pyrite. There is a subtle Mo anomaly in some mineralised black sheared rocks. Gold ranges from 0.1 to >10 ppm through large volumes of rock in the shear zone.

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Graphite and Shear Zone Evolution,raphite deposition had physical effects on shear-related mineralisation, by lubricating the structures with positive feedback effects. In addition, graphite has had geochemical effects on mineralisation by facilitating low redox replacement reactions and gold deposition.

genesis

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Conclusions: Key Controls on Making of a World Class Deposit,actions in host rocks dominated mineralisation, in contrast to many orogenic deposits that are dominated by quartz veins. Macraes mineralisation style was affected by subtle lithological variation, with micaceous schists predominating.