 | | 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...mainly pyrite and arsenopyrite. Sulphide minerals were eroded and deposited in the Macraes Flat river |  | 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) | | turbidite-hosted orogenic gold deposits of the Otago Schist, New Zealand Ben J. Cave 1 & Iain K. Pitcairn 2 & Dave...Abstract The orogenic gold deposits of the Otago Schist, New Zealand, are enriched in a variety of trace elements...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 |  | | Journal (article/letter/editorial) | | rock, Macraes gold mine, Otago Schist, New Zealand D. Craw * Geology Department, University of Otago, PO...9001 Dunedin, New Zealand Received 7 June 2001; accepted 31 May 2002 Abstract The Macraes gold deposit...deposit in the Otago Schist, New Zealand, formed during late metamorphic fluid flow through a lower greenschist...controlled. Mineralised rocks have pyrite and arsenopyrite along microshears. Pyrite, chalcopyrite, sphalerite...reserved. Keywords: Gold; Metamorphism; Graphite; New Zealand 1. Introduction Most schist-hosted mesothermal |  | | Journal (article/letter/editorial) | | refractory ore in an orogenic gold deposit, Macraes mine, New Zealand Received: 5 October 2004 / Accepted:...March 2005 Springer-Verlag 2005 Abstract The Macraes mine is hosted in an orogenic (mesothermal) gold...gold deposit in metasedimentary rocks of the Otago Schist belt. Much gold occurs within altered schist with...millimetre-scale pyrite cubes (typically 1–2 wt% S) and minor silicification. The earliest pyrite contained Ni...been illitised during hydrothermal alteration. Pyrite and arsenopyrite in microshears are fractured and |  | 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...Berlin Heidelberg 2016 Abstract The world-class Macraes orogenic gold deposit (∼10 Moz resource) formed...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 |  | | 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...thrust system in biotite grade Otago Schist. Native gold, scheelite, pyrite and arsenopyrite are found in...oil), similar to graphite in medium-high grade Otago Schist, and is presumed to be metamorphic in origin...mineralization (Nesbitt et al. 1986). In the Otago Schist, New Zealand, there are numerous Au-W deposits hosted |  | 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) | | Gold Deposits: Insights from the Otago and Alpine Schists, New Zealand IAIN K. PITCAIRN,†,* DAMON A. H...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)...orogenic gold deposits, including the 125-t Au Macraes deposit. As such, the schist belt is an ideal geologic...the lithologic and metamorphic variation in the Otago and Alpine schists was collected and analyzed for |  | 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) | | Orogenic Gold Mineralization in the Otago Schist Belt, South Island, New Zealand: Constraints from Lead Isotope...University of Otago, Dunedin, New Zealand 9054 Abstract The Otago Schist belt of southern New Zealand hosts...metamorphism. Previous 40Ar/39Ar dating studies in the Otago Schist belt indicate formation ages of ~106 to 101...a gold-bearing quartz stockwork vein at the Macraes mine, which is a relatively old mineralized system...Fine-grained muscovite from a quartz shear vein at Macraes gives a rising age spectrum with a maximum age |  | | Journal (article/letter/editorial) | | precursor to orogenic gold mineralisation, Otago Schist, New Zealand Anicia Henne & Dave Craw Received: 3...January 2012 # Springer-Verlag 2012 Abstract The Macraes orogenic gold deposit is hosted by a graphitic...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...detrital organic matter (<0.1 wt.%) and diagenetic pyrite (<0.3 wt.% S). The detrital organic carbon was |  | 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) | | Hill Shear Zone-Hosted Gold Deposit, Macraes Flat, Otago, New Zealand: Evidence of a Magmatic Ore Fluid...Nuclear Sciences, P.O. Box 31-312, Lower Hutt, New Zealand KEVIN FAURE,* Department of Geochemistry, Geological...or near, the HydeMacraes shear zone, Macraes Flat, New Zealand. Field relationships show stockwork veins...oldest part of the hydrothermal system, followed by flat and ramp veins. Hanging-wall shear veins formed...results for dominant type I inclusions show that flat and ramp veins have the same average wt percent |  | | Journal (article/letter/editorial) | | a ductile-brittle shear zone, Macraes Mine, Otago Schist, New Zealand Received: 4 December 1997 / Accepted:...facies schist which hosts the Macraes Mine in East Otago, New Zealand has been pervasively altered by...reduction and recrystallization of micas to form a new foliation. Muscovite has grown at the expense of...Hydrothermal alteration was accompanied by addition of pyrite, arsenopyrite and gold without development of quartz...quartz veins which contain gold, scheelite, rutile, pyrite and arsenopyrite. This deposit displays a continuum |  | 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) | | Mineralization within the Hyde-Macraes Shear Zone, Southern New Zealand Andrew Allibone,1,† Philip Jones...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) | | 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...of the HMSZ at the Macraes mine. A. Photograph of the main active pit at Macraes mine (2005), showing the...Inset: location map showing the Macraes mine in the South Island of New Zealand. B. Outcrop sketch from the |  | 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) | | scheelite in an orogenic hydrothermal system, Macraes mine, New Zealand Doug MacKenzie a, Lauren Farmer a, Jonathan...of Otago, PO Box 56, Dunedin 9054, New Zealand OceanaGold Ltd, 22 McLaggan St, Dunedin 9016, New Zealand...The Macraes deposit (N 10 Moz resource) is a Cretaceous orogenic system hosted in the Hyde-Macraes Shear...fracture permeability. The Au and W enrichment in the Macraes deposit resulted from regional scale metal mobility...metamorphism that persisted structurally below the Macraes deposit for at least 10 Ma after mineralisation |  | | 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...albite or muscovite was detectable. Oxidation of pyrite produced the dissolved sulphate and hydrogen ions...decomposition of calcite and chlorite intergrown with pyrite. The rates of combined calcite and chlorite decomposition |  | 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) | | ore shoots in the Frasers gold deposit, Macraes mine, New Zealand Andrew Allibone, Philip Jones, Jonathan...ore shoots in the Frasers gold deposit, Macraes mine, New Zealand, Ore Geology Reviews (2017), doi: http://dx...ore shoots in the Frasers gold deposit, Macraes mine, New Zealand Andrew Allibonea, Philip Jonesb, Jonathan... 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 |  | | Journal (article/letter/editorial) | | Climate, Southern New Zealand Gemma Kerr and Dave Craw * Geology Department, University of Otago, P.O. Box 56...56, Dunedin 9054, New Zealand; gemma.kerr@otago.ac.nz * Correspondence: dave.craw@otago.ac.nz; Tel.:...active semiarid rain shadow zone of southern New Zealand and are probably typical for this type of environment...derived from basement pyrite and marine aerosols in rain. Detrital and authigenic pyrite is common below the...minerals are common above the fluctuating water table. Pyrite oxidation was common but any acid generated was |  | | 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...Oceana Gold Limited, P.O. Box 84, Palmerston, Otago, New Zealand the horizontal shear stress. Our models |  | | 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 |  | | Journal (article/letter/editorial) | | 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...antimony oxide precipitation occurs locally. Most mine waters have lower dissolved Sb concentrations, especially |  | | Journal (article/letter/editorial) | | Department, University of Otago, Leith Street, PO Box 56, Dunedin 9001, New Zealand Received 29 August 2002;...suite of a variety of thin sediments in southern New Zealand, with no evidence for chemical corrosion. These...the new thermodynamic data suggest that arsenopyrite has similar Eh – pH stability range to pyrite, except...Calculated As concentrations in equilibrium with the pyrite – arsenopyrite assemblage in the surficial environment...the laboratory and up to 400 ppm dissolved As in mine processing waters. These concentrations of dissolved |  | | Journal (article/letter/editorial) | | arsenate (V) ion adsorption from mine waters, Macraes mine, New Zealand Alisa J. Roddick-Lanzilottaa, A...University of Otago, PO Box 56, Dunedin, New Zealand b Geology Department, University of Otago, PO Box 56...56, Dunedin, New Zealand Received 5 October 2000; accepted 17 August 2001 Editorial handling by R. Fuge...contain up to 10 mg l1 dissolved As at the Macraes mine, New Zealand, and this is all removed by adsorption...being deposited from dam discharge waters at the Macraes mine. An adsorption isotherm determined for this |  | 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...nitrogen remain. The Otago and Alpine Schists in the South Island of New Zealand comprise a large, comparatively...from a number of crustal transects through the Otago crust. The range of y15N values for mica and whole...whole rock concentrations, indicates that for the Otago and Alpine T Corresponding author. Tel.: +44 23 |  | 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) | | Vein, NW Otago Schist, New Zealand R. Hay and D. Craw Geology Department, University of Otago, P.O. Box...Box 56, Dunedin, New Zealand Received: July 1, 1992 / Accepted: September 30, 1992 Abstract. The Invincible...Valley, NW Otago. The vein cuts north striking foliation in lower greenschist facies Otago Schist. Structures...of quartz, albite, muscovite, chlorite, calcite, pyrite, arsenopyrite and minor gold. These minerals have...earliest recognised gold-bearing vein system in the Otago Schist. Gold-quartz vein deposits are commonly |
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