Contrasting coeval paragenesis of gold and scheelite in an orogenic hydrothermal system, Macraes mine, New Zealand
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- 作者：Doug MacKenzie<sup>asup> ; Lauren Farmer<sup>asup> ; Jonathan Moore<sup>bsup> ; Dave Craw<sup>asup><sup> ; sup><sup>dave.craw@otago.ac.nz" class="auth_mail" title="E-mail the corresponding authorsup>
- 关键词：Gold ; Tungsten ; Hydrothermal ; Structure ; Shear ; Metamorphism
- 刊名：Ore Geology Reviews
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：80
- 期：Complete
- 页码：645-657
- 全文大小：4825 K
文摘
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Gold and tungsten mineralisation occurred under late metamorphic ductile conditions.
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On all scales (mm to hundreds of m), Au and W are weakly correlated because of differing mineralisation processes.
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Most gold was emplaced via sulphide replacement of silicates in continuous ductile micaceous graphitic shears.
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Scheelite occurs with quartz in veins infilling discontinuous brittle fractures.
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Mineralisation resulted from shear-controlled migration of metamorphogenic fluid with Au and W from higher grade rocks.