Abstract
Metals to form the Macraes deposit were derived from the host schists during prograde metamorphism. The metal-bearing metamorphogenic fluid was generated during dehydration of metasediments in the prograde transition from upper greenschist facies to amphibolite facies, at the same time as the Hyde-Macraes Shear Zone was forming retrogressively at shallower levels. Similar processes are occurring in some modern collisional orogens, including the Southern Alps mountains to the north of the Macraes deposit.
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References
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Craw, D., MacKenzie, D. (2016). Genesis of Macraes as a Metamorphogenic Gold Deposit. In: Macraes Orogenic Gold Deposit (New Zealand). SpringerBriefs in World Mineral Deposits. Springer, Cham. https://doi.org/10.1007/978-3-319-35158-2_9
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DOI: https://doi.org/10.1007/978-3-319-35158-2_9
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