 | | Journal (article/letter/editorial) | | sedimentary basin, New Zealand D. Craw Ł , D.A. Chappell Geology Department, University of Otago, P.O. Box 56...Dunedin, New Zealand Received 6 April 1999; accepted 5 August 1999 Abstract River sediments at Macraes Flat...Flat, east Otago have formed in a tectonically active depression in the Otago Schist basement adjacent...Hyde–Macraes Shear Zone crosses the depression, and this shear zone hosts the Macraes gold mine. The...Sulphide minerals were eroded and deposited in the Macraes Flat river sediments at least 28,000 years ago. The |  | de Ronde, C. E. J., Faure, K., Bray, C. J., Whitford, D. J. (2000) Round Hill Shear Zone-Hosted Gold Deposit, Macraes Flat, Otago,New Zealand: Evidence of a Magmatic Ore Fluid. Economic Geology, 95 (5) 1025-1048 doi:10.2113/gsecongeo.95.5.1025 | Journal (article/letter/editorial) | | Round Hill Shear Zone-Hosted Gold Deposit, Macraes Flat, Otago, New Zealand: Evidence of a Magmatic Ore...Nuclear Sciences, P.O. Box 31-312, Lower Hutt, New Zealand KEVIN FAURE,* Department of Geochemistry, Geological...zone-hosted gold deposit is one of several located on, or near, the HydeMacraes shear zone, Macraes Flat, New...New Zealand. Field relationships show stockwork veins are the oldest part of the hydrothermal system, followed...followed by flat and ramp veins. Hanging-wall shear veins formed early but have been modified by late |  | Cave, Ben J., Pitcairn, Iain K., Craw, Dave, Large, Ross R., Thompson, Jay M., Johnson, Sean C. (2017) A metamorphic mineral source for tungsten in the turbidite-hosted orogenic gold deposits of the Otago Schist, New Zealand. Mineralium Deposita, 52 (4) 515-537 doi:10.1007/s00126-016-0677-5 | Journal (article/letter/editorial) | | the turbidite-hosted orogenic gold deposits of the Otago Schist, New Zealand Ben J. Cave 1 & Iain K. Pitcairn...2016 Abstract The orogenic gold deposits of the Otago Schist, New Zealand, are enriched in a variety...Scheelite from syn-metamorphic veins at Fiddlers Flat and Lake Hāwea shows distinct differences in composition...scheelite from late-metamorphic veins at the Macraes Mine, the latter of which is enriched in REEs, Y...Y and Sr. We suggest that the scheelite at Macraes became enriched due to the liberation of these elements |  | Mortensen, J. K., Craw, D., MacKenzie, D. J., Gabites, J. E., Ullrich, T. (2010) Age and Origin of Orogenic Gold Mineralization in the Otago Schist Belt, South Island, New Zealand: Constraints from Lead Isotope and 40Ar/39Ar Dating Studies. Economic Geology, 105 (4) 777-793 doi:10.2113/gsecongeo.105.4.777 | Journal (article/letter/editorial) | | Origin of Orogenic Gold Mineralization in the Otago Schist Belt, South Island, New Zealand: Constraints from...University of Otago, Dunedin, New Zealand 9054 Abstract The Otago Schist belt of southern New Zealand hosts...hosts numerous orogenic gold deposits that formed in a range of structural and lithological settings during...metamorphism. Previous 40Ar/39Ar dating studies in the Otago Schist belt indicate formation ages of ~106 to 101...method. Muscovite from a gold-bearing quartz stockwork vein at the Macraes mine, which is a relatively |  | PITCAIRN, I, TEAGLE, D, KERRICH, R, CRAW, D, BREWER, T (2005) The behavior of nitrogen and nitrogen isotopes during metamorphism and mineralization: Evidence from the Otago and Alpine Schists, New Zealand. Earth and Planetary Science Letters, 233 (1) 229-246 doi:10.1016/j.epsl.2005.01.029 | Journal (article/letter/editorial) | | mineralization: Evidence from the Otago and Alpine Schists, New Zealand Iain K. Pitcairna,1, Damon A.H....Department of Geology, University of Otago, PO Box 56, Dunedin, New Zealand d Department of Geology, University...occurrence of major gold resources within these terranes. However, although orogenic gold deposits have contributed...contributed over 20% of the global gold production, their origins remain controversial. The nitrogen concentration...the source of fluids in some Neoarchean orogenic gold deposits and Proterozoic to Paleozoic mountain belts |  | | Journal (article/letter/editorial) | | rock, Macraes gold mine, Otago Schist, New Zealand D. Craw * Geology Department, University of Otago, PO...Dunedin, New Zealand Received 7 June 2001; accepted 31 May 2002 Abstract The Macraes gold deposit in...in the Otago Schist, New Zealand, formed during late metamorphic fluid flow through a lower greenschist...Keywords: Gold; Metamorphism; Graphite; New Zealand 1. Introduction Most schist-hosted mesothermal gold deposits...1986). In contrast, the Macraes gold mine in the Otago Schist of New Zealand has volumetrically minor |  | Allibone, Andrew, Jones, Philip, Blakemore, Hamish, Craw, Dave, MacKenzie, Doug, Moore, Jonathan (2018) Structural Setting of Gold Mineralization within the Hyde-Macraes Shear Zone, Southern New Zealand. Economic Geology, 113 (2) 347-375 doi:10.5382/econgeo.2018.4553 | Journal (article/letter/editorial) | | Structural Setting of Gold Mineralization within the Hyde-Macraes Shear Zone, Southern New Zealand Andrew Allibone...758, Wanaka 9343, New Zealand Gold, 22 McLaggan Street, Dunedin 9016, New Zealand of Geology, University...University of Otago, P.O. Box 56, Dunedin 9054, New Zealand Abstract The 10 Moz Macraes gold deposit in...in southern New Zealand is hosted within a 100-m-thick slice of weakly altered schist and the overlying...base of the >1.5-km-thick, gently dipping, Hyde-Macraes shear zone. The term “Hanging-wall” reflects the |  | | Journal (article/letter/editorial) | | schist-hosted metamorphogenic Au-W deposit, Macraes, East Otago, New Zealand S.A. McKeag, D. Craw* and R.J. Norris...Department, University of Otago, Dunedin, New Zealand Abstract. The Macraes gold-tungsten deposit occurs...low-angle thrust system in biotite grade Otago Schist. Native gold, scheelite, pyrite and arsenopyrite are...oil), similar to graphite in medium-high grade Otago Schist, and is presumed to be metamorphic in origin...acted as a reducing agent to cause precipitation of gold where the thrust system, acting as a conduit for |  | | Journal (article/letter/editorial) | | refractory ore in an orogenic gold deposit, Macraes mine, New Zealand Received: 5 October 2004 / Accepted:...Springer-Verlag 2005 Abstract The Macraes mine is hosted in an orogenic (mesothermal) gold deposit in metasedimentary...metasedimentary rocks of the Otago Schist belt. Much gold occurs within altered schist with minimal silica-addition...contained Ni and/or As in solid solution and no gold was imaged in these pyrites or later arsenopyrite...arsenopyrite grains. The ore type is refractory and gold recovery by cyanide leaching is less than 50%, with lowest |  | | Journal (article/letter/editorial) | | and 26Al at great depths at the Macraes Flat, East Otago, New Zealand K.J. Kim a,b,*, P.A.J. Englert a...University of Wellington, P.O. Box 600, Wellington, New Zealand Institute of Geological and Nuclear Sciences...Sciences, Ltd., P.O. Box 31-312, Lower Hutt, New Zealand Received 4 December 2003; received in revised form 2...2 depth at three locations in Macraes gold mine, East Otago, New Zealand. The measured 26Al/10Be ratios...the average model surface exposure age of the Macraes Flat was determined to be 25.0 F 3.3 kyr. The erosion |  | Goodwin, Nicholas R. J., Burgess, Ray, Craw, Dave, Teagle, Damon A. H., Ballentine, Chris J. (2017) Noble gases fingerprint a metasedimentary fluid source in the Macraes orogenic gold deposit, New Zealand. Mineralium Deposita, 52 (2) 197-209 doi:10.1007/s00126-016-0648-x | Journal (article/letter/editorial) | | metasedimentary fluid source in the Macraes orogenic gold deposit, New Zealand Nicholas R. J. Goodwin 1 & Ray...Heidelberg 2016 Abstract The world-class Macraes orogenic gold deposit (∼10 Moz resource) formed during...of a metasedimentary schist belt in southern New Zealand. Mineralising fluids, metals and metalloids were...higher than typical magmatic/mantle fluids. The Macraes mineralising fluids were compositionally variable...minor meteoric incursion cannot be discounted. The Macraes deposit formed in a metasedimentary belt without |  | Allibone, Andrew, Jones, Philip, Moore, Jonathan, Craw, Dave, MacKenzie, Doug, Blakemore, Hamish (2017) Kilometre-scale structural setting of ore shoots in the Frasers gold deposit, Macraes mine, New Zealand. Ore Geology Reviews, 89. 1107-1121 doi:10.1016/j.oregeorev.2017.05.019 | Journal (article/letter/editorial) | | setting of ore shoots in the Frasers gold deposit, Macraes mine, New Zealand Andrew Allibone, Philip Jones,...setting of ore shoots in the Frasers gold deposit, Macraes mine, New Zealand, Ore Geology Reviews (2017), doi:...setting of ore shoots in the Frasers gold deposit, Macraes mine, New Zealand Andrew Allibonea, Philip Jonesb... Wanaka 9343, New Zealand b Oceana Gold, 22 McLaggan Street, Dunedin 9016, New Zealand c Department of... University of Otago, PO Box 56, Dunedin 9054, New Zealand Abstract The Hyde-Macraes Shear Zone in southern |  | Pitcairn, I. K., Teagle, D. A. H., Craw, D., Olivo, G. R., Kerrich, R., Brewer, T. S. (2006) Sources of Metals and Fluids in Orogenic Gold Deposits: Insights from the Otago and Alpine Schists, New Zealand. Economic Geology, 101 (8) 1525-1546 doi:10.2113/gsecongeo.101.8.1525 | Journal (article/letter/editorial) | | Fluids in Orogenic Gold Deposits: Insights from the Otago and Alpine Schists, New Zealand IAIN K. PITCAIRN...Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand GEMA R. OLIVO, Department of...Kingdom Abstract The Otago and Alpine schists of the South Island of New Zealand form a young (<200 Ma)...contains abundant orogenic gold deposits, including the 125-t Au Macraes deposit. As such, the schist...responsible for formation of metamorphic rock-hosted gold deposits. A large suite of samples representative |  | | Journal (article/letter/editorial) | | zone, Macraes mine, New Zealand Phaedra Upton ⁎, Dave Craw Geology Department, University of Otago, PO...PO Box 56, Dunedin, New Zealand Received 14 June 2007; received in revised form 3 October 2007; accepted...Abstract The Hyde–Macraes Shear Zone (HMSZ) is a mineralised low-angle shear within the Otago Schist traceable...along 12 km of this strike, producing N 6 Moz of gold. The shear zone formed under lower greenschist facies...2007 Elsevier B.V. All rights reserved. Keywords: gold; graphite; schist; shear; numerical model; structure; |  | | Journal (article/letter/editorial) | | benefits of mine scale three-dimensional structural modelling at Macraes Gold Mine, Central Otago, New Zealand:...J. Mascini2 Macraes Mine is an open-cut and underground gold mine located in Central Otago, on the South...South Island of New Zealand, which has extracted over 3 million ounces of gold since production commenced...gained from systematic geological mapping of the Macraes Open Pit such as identifying small to medium scale...faulting. Keywords: Macraes, Hyde–Macraes Shear Zone, Gold, Structural model, Mapping, Otago Schist Introduction |  | MacKenzie, Doug, Farmer, Lauren, Moore, Jonathan, Craw, Dave (2017) Contrasting coeval paragenesis of gold and scheelite in an orogenic hydrothermal system, Macraes mine, New Zealand. Ore Geology Reviews, 80. 645-657 doi:10.1016/j.oregeorev.2016.08.011 | Journal (article/letter/editorial) | | paragenesis of gold and scheelite in an orogenic hydrothermal system, Macraes mine, New Zealand Doug MacKenzie...of Otago, PO Box 56, Dunedin 9054, New Zealand OceanaGold Ltd, 22 McLaggan St, Dunedin 9016, New Zealand...Keywords: Gold Tungsten Hydrothermal Structure Shear Metamorphism a b s t r a c t The Macraes deposit...Cretaceous orogenic system hosted in the Hyde-Macraes Shear Zone (HMSZ) which was mineralised under lower...facies metamorphism of host metasedimentary schists. Gold is encapsulated primarily in sulphides that have |  | | Journal (article/letter/editorial) | | quartz vein formation in a thrust zone, Macraes mine, New Zealand Phaedra Upton & Mike Begbie & Dave Craw...2007 # Springer-Verlag 2007 Abstract The Hyde-Macraes Shear Zone (HMSZ) is a regionally continuous, low-angle...(~15°) latemetamorphic thrust zone in the Mesozoic Otago Schist. The shear zone, which is host to large volumes...Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand e-mail: phaedra.upton@stonebow...USA M. Begbie Oceana Gold Limited, P.O. Box 84, Palmerston, Otago, New Zealand the horizontal shear |  | | Journal (article/letter/editorial) | | Angus Gold mineralization without quartz veins in a ductile-brittle shear zone, Macraes Mine, Otago Schist...Schist, New Zealand Received: 4 December 1997 / Accepted: 21 September 1998 Abstract Greenschist facies...facies schist which hosts the Macraes Mine in East Otago, New Zealand has been pervasively altered by post-metamorphic...reduction and recrystallization of micas to form a new foliation. Muscovite has grown at the expense of...of pyrite, arsenopyrite and gold without development of quartz veins. Gold precipitated with sulphides |  | | Journal (article/letter/editorial) | | as a precursor to orogenic gold mineralisation, Otago Schist, New Zealand Anicia Henne & Dave Craw Received:...2012 # Springer-Verlag 2012 Abstract The Macraes orogenic gold deposit is hosted by a graphitic micaceous...protoliths, that occur locally in background pelitic Otago Schist metasediments. This study was aimed at determining... Argillites in the protolith turbidites of the Otago Schist metamorphic belt contain minor amounts of...Geology Department, University of Otago, PO Box 56, Dunedin, New Zealand e-mail: dave.craw@otago.ac.nz |  | Scanlan, Emma J., Scott, James M., Wilson, Victoria J., Stirling, Claudine H., Reid, Malcolm R., Le Roux, Petrus J. (2018) In Situ 87Sr/86Sr of Scheelite and Calcite Reveals Proximal and Distal Fluid-Rock Interaction During Orogenic W-Au Mineralization, Otago Schist, New Zealand. Economic Geology, 113 (7) 1571-1586 doi:10.5382/econgeo.2018.4603 | Journal (article/letter/editorial) | | During Orogenic W-Au Mineralization, Otago Schist, New Zealand Emma J. Scanlan,1,†,* James M. Scott,1...of Otago, Dunedin 9054, New Zealand of Chemistry, University of Otago, Dunedin 9054, New Zealand for...Trace Element Analysis, University of Otago, Dunedin 9054, New Zealand 4Department of Geological Sciences...W-Au mineralization occurring in the Otago Schist in New Zealand. Scheelite Sr isotope populations, regardless... while scheelite 87Sr/86Sr values in the Hyde-Macraes shear zone and the Barewood and Bendigo deposits |  | | Journal (article/letter/editorial) | | BiologicallyMediated Gold Mobilisation and Redeposition in a Semiarid Climate, Southern New Zealand Gemma Kerr...Geology Department, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand; gemma.kerr@otago.ac.nz * Correspondence:...2017; Published: 16 August 2017 Abstract: Detrital gold in Late Pleistocene-Holocene placers has been chemically...active semiarid rain shadow zone of southern New Zealand and are probably typical for this type of environment...pyrite below the water table. Deposition of mobilised gold resulted from localised variations in redox and/or |  | | Journal (article/letter/editorial) | | mobility of Sb and As at mesothermal antimony and gold deposits D. Craw, N. Wilson and P. M. Ashley Antimony...comparison to that of arsenic, is documented at mine sites in four different mesothermal systems in low...Palaeozoic-Mesozoic metamorphic terranes of New Zealand (Globe Hill, Reefton; Macraes, Otago; and Endeavour Inlet, Marlborough)...Australia (Hillgrove, New South Wales). Dissolved antimony can reach ~50 mg/kg in mine waters where evaporative...concentration occurs in oxidised near-neutral pH mine waters in contact with stibnite. Such waters are |  | | Journal (article/letter/editorial) | | Examples from gold-quartz vein systems in Juneau, Alaska; Victoria, Australia and Otago, New Zealand R.H. Sibson...Department of Geology, UniÕersity of Otago, P.O. Box 56, Dunedin, New Zealand Received 1 January 1997 Abstract...downwards into the core of a cooling orogen. Mesozonal gold-quartz vein systems hosted in fault-fracture meshes...concepts are explored principally through comparison of gold-quartz vein systems hosted in fault-fracture meshes...those developed within the Mesozoic Otago Schists of southern New Zealand. The stress state within the carapace |  | | Journal (article/letter/editorial) | | dam, Otago, New Zealand D. Craw Geology Department, UniÕersity of Otago, PO Box 56, Dunedin, New Zealand...chemistry monitoring of a large mine tailings impoundment dam at the Macraes mine provided a site for a 5-year...study of progressive water–rock interaction with Otago Schist greenschist facies schist debris. Water of...experimental observations and other mine sites because the Macraes mine chlorite is intimately intergrown...rights reserved. Keywords: Environmental geology; Mine drainage; Chlorite; Calcite; Pyrite; Chemical weathering |  | | Journal (article/letter/editorial) | | of orogenic gold in southern New Zealand Dave Craw Geology Department, University of Otago, PO Box 56...56, Dunedin 9054, New Zealand a r t i c l e i n f o Article history: Received 30 November 2009 Received...Keywords: Alluvial Gold Tectonics Shear zone Mesothermal Exhumation a b s t r a c t The giant gold placer system...system on the Otago Schist of southern New Zealand was derived from Mesozoic orogenic gold deposits in...structural zones in, or adjacent to, major orogenic gold deposits. Quartz textures in these structural zones |
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