 | | 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...sulphidation of silicates with no addition of metals. Graphite has been added to mineralised rocks along microshears...a background of 0.1 wt.% noncarbonate carbon. Graphite deposition may have occurred as a result of mixing |  | | 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...occurs in a low-angle thrust system in biotite grade Otago Schist. Native gold, scheelite, pyrite and arsenopyrite...rock. Graphite within the shear zone rocks has reflectance of 6 - 7 % (in oil), similar to graphite in medium-high...medium-high grade Otago Schist, and is presumed to be metamorphic in origin. This graphite has acted as a |  | 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 HÄwea 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) | | role of graphite in development of a mineralised mid-crustal shear zone, Macraes mine, New Zealand Phaedra...Geology Department, University of Otago, PO Box 56, Dunedin, New Zealand Received 14 June 2007; received...Abstract The HydeâMacraes Shear Zone (HMSZ) is a mineralised low-angle shear within the Otago Schist traceable...been enhanced by the deposition of hydrothermal graphite. We model the development of these microshears...deformation is distributed into weak shear bands. Graphite deposition and associated reaction-softening have |  | | 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...Geology Department, University of Otago, PO Box 56, Dunedin, New Zealand E-mail: dave.craw@stonebow.otago...mineralised black shears, which contain hydrothermal graphite and late-stage cataclastic sulphides. This black |  | | Journal (article/letter/editorial) | | and graphite enrichment in metaturbidites as a precursor to orogenic gold mineralisation, Otago Schist...Schist, New Zealand Anicia Henne & Dave Craw Received: 3 February 2011 / Accepted: 5 January 2012 # Springer-Verlag...Springer-Verlag 2012 Abstract The Macraes orogenic gold deposit is hosted by a graphitic micaceous schist...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 |  | 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) | | 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...are locally enriched in rutile and hydrothermal graphite. Strain was then concentrated into narrow (m scale)...reduction and recrystallization of micas to form a new foliation. Muscovite has grown at the expense of...sulphides during reduction of the ÂŻuid by hydrothermal graphite. The whole altered rock sequence was later cut |  | 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...competent lenses, and were enhanced by hydrothermal graphite deposition and alteration of albite to muscovite...fracture permeability. The Au and W enrichment in the Macraes deposit resulted from regional scale metal mobility |  | 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 |  | 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 (âŒ10 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) | | 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...earliest recognised gold-bearing vein system in the Otago Schist. Gold-quartz vein deposits are commonly...syn-metamorphic mineralised vein system in the Otago Schist belt, New Zealand, a metamorphic belt in which there |  | | 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) | | 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, HydeâMacraes Shear Zone, Gold, Structural model, Mapping, Otago Schist Introduction |  | | Journal (article/letter/editorial) | | 2010 Keywords: Turbidite-hosted gold deposits Graphiteâgold association InterïŹow (chemical) sediments...latter. Given the relatively signiïŹcant amounts of graphite associated with the major Ashanti deposits, the...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...(Groves et al., 1998) which often contain signiïŹcant graphite. They contain minor sulphides, mainly pyrite and |  | | 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) | | Orogen, Australia; Buller Terrane and Otago Schist, New Zealand; Meguma Terrane, Canada; Tien Shan Mountains... the Buller Terrane and the Otago Schist in South Island of New Zealand, the French Massif Central, the...producers in central Victoria, Nova Scotia, New Zealand and elsewhere ĆœChristie et al., 1999; Bierlein...Shan. or rapid uplift Ćœe.g., South Island of New Zealand. have removed weathering profiles, deep weathering...crust of Tasmaniaâthe Selwyn Blockâunderlies the region and protected it from the earlier deformation. |  | | 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...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) | | uplift of the Otago and Alpine Schist, New Zealand D. Craw Geology Department. University Qf Otago, P.O. Box...Box 56. Dunedin, New Zealand (Received August 22, 1990; revised and accepted January 12, 1992 ) ABSTRACT...uplift of the Otago and Alpine Schist, New Zealand. Chem. Geol., 98:221-236. The Otago and Alpine Schist...transition and in the lower parts of the brittle region were deposited by water with < 1 mole% COz and...t m e n t , University of Otago, P.O. Box 56, D u n e d i n , New Zealand. uplift history. Major vein |  | | 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) | | 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 |  | Hu, Si-Yu, Evans, Katy, Fisher, Louise, Rempel, Kirsten, Craw, Dave, Evans, Noreen J., Cumberland, Susan, Robert, Aileen, Grice, Kliti (2016) Associations between sulfides, carbonaceous material, gold and other trace elements in polyframboids: Implications for the source of orogenic gold deposits, Otago Schist, New Zealand. Geochimica et Cosmochimica Acta, 180. 197-213 doi:10.1016/j.gca.2016.02.021 | Journal (article/letter/editorial) | | the source of orogenic gold deposits, Otago Schist, New Zealand Si-Yu Hu, Katy Evans, Louise Fisher, Kirsten...the source of orogenic gold deposits, Otago Schist, New Zealand, Geochimica et Cosmochimica Acta (2016)...Source of 4 Orogenic Gold Deposits, Otago Schist, New Zealand 5 6 Si-Yu Hu a,b,*, Katy Evans a, Louise...Geology Department, University of Otago, GPO Box 56, Dunedin 9054, New Zealand e John de Laeter Center, The...prehnite-pumpellyite facies 30 rocks of the Otago Schist, New Zealand. This study quantifies the metal contents |  | | 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...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...abundant in the schist host rocks near Macraes, but the Macraes mineralised zone has epidote altered to |
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