Contrasting coeval paragenesis of gold and scheelite in an orogenic hydrothermal system, Macraes mine, New Zealand
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文摘

Gold and tungsten mineralisation occurred under late metamorphic ductile conditions.

On all scales (mm to hundreds of m), Au and W are weakly correlated because of differing mineralisation processes.

Most gold was emplaced via sulphide replacement of silicates in continuous ductile micaceous graphitic shears.

Scheelite occurs with quartz in veins infilling discontinuous brittle fractures.

Mineralisation resulted from shear-controlled migration of metamorphogenic fluid with Au and W from higher grade rocks.

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