 | | 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...reserved. Keywords: Gold; Metamorphism; Graphite; New Zealand 1. Introduction Most schist-hosted mesothermal...1986). In contrast, the Macraes gold mine in the Otago Schist of New Zealand has volumetrically minor |  | | 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...relatively low sulphur content (<0.7 wt%) and muscovite has been illitised during hydrothermal alteration...Geology Department, University of Otago, PO Box 56, Dunedin, New Zealand E-mail: dave.craw@stonebow.otago |  | 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 |  | 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...veins and shear zones. Samples of hydrothermal muscovite from several mineralized quartz vein systems were...40Ar/39Ar method. Muscovite from a gold-bearing quartz stockwork vein at the Macraes mine, which is a relatively |  | | 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...structurally controlled and occurs with metamorphic muscovite and chlorite as veins and slickensided shears |  | | 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...metamorphic minerals including siderite, chlorite, muscovite and calcite. The early stages of this alteration...and recrystallization of micas to form a new foliation. Muscovite has grown at the expense of albite in...Department, University of Otago, PO Box 56, Dunedin, New Zealand P.V. Angus Macraes Mining Co. Ltd, PO Box |  | | Journal (article/letter/editorial) | | zone, Macraes mine, New Zealand Phaedra Upton â, 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 HydeâMacraes 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...graphite deposition and alteration of albite to muscovite. In contrast, scheelite with minor auriferous...fracture permeability. The Au and W enrichment in the Macraes deposit resulted from regional scale metal mobility |  | | Journal (article/letter/editorial) | | sedimentary basin, New Zealand D. Craw Ć , 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...HydeâMacraes 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 |  | 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,â ,* 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) | | dam, Otago, New Zealand D. Craw Geology Department, UniĂersity 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 waterârock interaction with Otago Schist greenschist facies schist debris. Water of...increased, but no decomposition of albite or muscovite was detectable. Oxidation of pyrite produced the...experimental observations and other mine sites because the Macraes mine chlorite is intimately intergrown |  | | 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 |  | | 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 |  | 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,â ,* 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 |  | | 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 the fault zone consist of quartz, albite, muscovite, chlorite, calcite, pyrite, arsenopyrite and minor...earliest recognised gold-bearing vein system in the Otago Schist. Gold-quartz vein deposits are commonly |  | 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 |  | 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,â 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 âHanging-wallâ reflects the |  | | Journal (article/letter/editorial) | | southern New Zealand Dave Craw Geology Department, University of Otago, PO Box 56, Dunedin 9054, New Zealand...giant gold placer system on the Otago Schist of southern New Zealand was derived from Mesozoic orogenic...Canada had a similar geological history to the Otago placer ïŹeld, and Klondike placer accumulation occurred...to California (USA), Victoria (Australia), Otago (New Zealand), and the Klondike (Yukon, Canada) (Boyle...from California (Boyle, 1979), ca 240 tonnes from Otago (Williams, 1974) and at least 450 tonnes from the |  | Weightman, Erin, Craw, Dave, Rufaut, Cathy, Kerr, Gemma, Scott, James (2020) Chemical evolution and evaporation of shallow groundwaters discharging from a gold mine, southern New Zealand. Applied Geochemistry, 122. 104766pp. doi:10.1016/j.apgeochem.2020.104766 | Journal (article/letter/editorial) | | groundwaters discharging from a gold mine, southern New Zealand Erin Weightman, Dave Craw *, Cathy Rufaut...Geology Department, University of Otago, PO Box 56, Dunedin, 9054, New Zealand A R T I C L E I N F O A B...Kersten Waste rock piles at the Macraes gold mine in southern New Zealand expose abundant fresh schist to...Compositionally different waters seeping from the mine tailings impoundment have >2500 mg/L dissolved sulfate...and these reactions affect the water quality of mine discharges (Plante et al., 2011; Lapakko, 2015; |  | | 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) | | 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...secondary minerals have formed with some of the new gold, providing some useful insights inorganic and...secondary minerals havegold formed with some of the new gold, providing some useful insights into the water |  | | 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...thermodynamic data for arsenopyrite. Calculations using the new thermodynamic data suggest that arsenopyrite has...the laboratory and up to 400 ppm dissolved As in mine processing waters. These concentrations of dissolved...protective oxide coatings on arsenopyrite grains. Mine tailings containing arsenopyrite should be chemically |  | | Journal (article/letter/editorial) | | 2006 Abstract Gold extraction at the Macraes gold mine in New Zealand involves concentration of pyrite and...cyanidation. The ore concentrate is predominantly Otago Schist host rock (andesitic composition) with up...altered andesite: quartz, albite, muscovite, chlorite, and pyrite. Muscovite undergoes almost complete dissolution...Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand e-mail: dave.craw@stonebow.otago...2001) is located at the Macraes gold mine, New Zealand (Craw 2003). The gold mine is developed in a mesothermal |  | | Journal (article/letter/editorial) | | DURING PROGRADE METAMORPHISM OF THE OTAGO AND ALPINE SCHISTS, NEW ZEALAND Iain K. PITCAIRN§ Department of...University of Otago, PO Box 56, Dunedin, New Zealand Abstract Sulfide minerals in the Otago and Alpine...Alpine schists, New Zealand, a metasedimentary belt exposed from unmetamorphosed greywackes up to amphibolite...metamorphism, orogenic gold, Otago Schists, Alpine Schists, New Zealand. Sommaire Les minĂ©raux sulfurĂ©s...sulfurĂ©s des schistes des sĂ©ries Otago et Alpine, en Nouvelle-ZĂ©lande, roches appartenant Ă une ceinture |  | | Journal (article/letter/editorial) | | 1995; Ramsay et al., 1998); the Otago Schist Belt, South Island, New Zealand (e.g., Craw, 2002; McKeag et...province, the Meguma terrane, the LFB, and the Otago Schist Belt. This article also examines the previously... 2004; and Otago Schist Belt â Craw, 1988), although saline ïŹuids are identiïŹed in Otago Schist ïŹuid...(Attoh et al., 2006). The basalts in the Ashanti mine area are unfoliated, but are metamorphosed to chlorite+...lavas and intermediate pyroclastics in the Ashanti mine area and suggest an evolution of basaltic-shield |
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