Gold Skarn And Porphyry Gold

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  • (PDF) Distribution of gold in porphyry copper

    Analysis of 55 porphyry copper deposits demonstrates a continuum between porphyry copper-gold deposits emplaced at a median depth of 1 km, with a median size of 160 million metric tons of copper ore and a median content of 2.6% magnetite in the potassic alteration zone, and porphyry copper-molybdenum deposits emplaced at a median depth of 3.6

  • Skarn and porphyry deposits resourcesandenergy.nsw.gov.au

    Gold Qtz+ Mag Late fluid egress from vein 1cm Key Garnet (zoned) Stage-1 Sta g e -2 Epidote Magnetite-Quartz Sevlage peach Quartz Pathways between skarns and porphyry deposits. Cadia Quarry—Big Cadia Skarn. Dynamic Model (Stages 1 & 2) Progressive Skarn porphyry

  • Gold in porphyry copper deposits: its abundance

    Porphyry copper deposits defined in this way gradually merge with porphyry gold deposits, as the Cu/Au ratio declines. With the prominent exception of Grasberg, most porphyry copper–gold deposits have higher copper grades and lower total ore tonnages than porphyry copper–molybdenum deposits Kesler, 1973, Kirkham and Sinclair, 1995, Long, 1995.

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  • Gold Skarn Deposits—Geology and Exploration

    About 10 6 kg (>30 Moz) of gold have been recovered from skarn deposits. These occurrences can be subdivided into five major skarn types: gold, iron, copper, porphyry copper, and lead-zinc. Each skarn type has distinctive characteristics and can be differentiated on the basis of geochemistry, mineralogy, pedogenesis, and tectonic setting.

  • Geology of Porphyry Copper Deposits

    That skarn had a high enough grade to allow it to continue to be mined from underground. The Big Gossans copper gold skarn deposit is the highest grade deposit in the Grasberg area. Reserves of 37,000,000 tons at 2.7% copper, 1 g per ton gold and 16 g of per ton silver that’s about $240 to $250 a

  • Skarns in the Porphyry Copper-Gold Environment

    Controls on skarn mineralisation and alteration at the Cadia Deposits, New South Wales, Australia, Economic Geology, 99:761-788. PACRIM Congress 2008 24 26 November 2008 5 SKARNS IN THE PORPHYRY COPPER-GOLD ENVIRONMENT Skarn name (location) Porphyry resource (wt % Cu, ppm Au) Skarn type and (skarn resource) Porphyry to skarn ratio Skarn

  • Chesapeake Gold Corp. Intercepts Skarn and

    21-6-2018· A high grade silver-gold vein field and ore grade zinc-gold skarn-hosted mineralization have been identified at Central and Lucy. The geological and geophysical work to date suggests Yarely could host several porphyry type targets which would be the first known in this region of the country.

  • (PDF) Distribution of gold in porphyry copper

    Analysis of 55 porphyry copper deposits demonstrates a continuum between porphyry copper-gold deposits emplaced at a median depth of 1 km, with a median size of 160 million metric tons of copper ore and a median content of 2.6% magnetite in the potassic alteration zone, and porphyry copper-molybdenum deposits emplaced at a median depth of 3.6

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  • Gold Skarn Deposits—Geology and Exploration

    About 10 6 kg (>30 Moz) of gold have been recovered from skarn deposits. These occurrences can be subdivided into five major skarn types: gold, iron, copper, porphyry copper, and lead-zinc. Each skarn type has distinctive characteristics and can be differentiated on the basis of geochemistry, mineralogy, pedogenesis, and tectonic setting.

  • Porphyry copper deposit Wikipedia

    For copper-molybdenum porphyry deposits, formation is broadly concentrated in three time periods: Palaeocene-Eocene, Eocene-Oligocene, and middle Miocene-Pliocene. For both porphyry and epithermal gold deposits, they are generally from the time period ranging from the middle Miocene to the Recent period., however notable exceptions are known.

  • Chesapeake Gold : Intercepts Skarn and Porphyry

    21-6-2018· Chesapeake Gold Corp. wishes to provide an update on the results of the Phase 1 drilling program at its regional Yarely Project in Sinaloa State, Mexico. Yarely encompasses 72,000 hectares and is June 21, 2018

  • Geology and genesis of the giant Beiya

    1. Introduction. The Beiya gold deposit, including the Wandongshan segment that contains ~ 99 million metric tons of ore at an average grade of 2.61 g/t Au (Yunnan Gold and Mineral Resources Corp., pers. Commun., 2014), is the largest known skarn Au deposit in China.

  • CU, AU, AND ZN-PB SKARN DEPOSITS (MODELS 18b,c; Cox and

    Fe skarn model, Hammarstrom and others, this volume). Total sulfide mineral content at the McCoy, Nev., gold skarn is low ( <2 volume percent) and many sulfide minerals are oxidized. In contrast, at the Fortitude, Nev., gold skarn about 30 km to the north, high grade ore is sulfide mineral rich, and includes mostly pyrrhotite as well as

  • skarn and porphyry gold crusher for sale

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  • 2.2 Porphyry-epithermal mineral system

    Skarn deposits are also zoned in this mineral system, with Cu-rich skarns generally very close to the causative intrusion, but Zn-Pb-rich skarns more distal. An important feature of the porphyry-epithermal mineral system is the telescoping of different deposit types, for instance porphyry Cu-Au-Mo deposits and epithermal deposits of various types.

  • Millrock Acquires Stellar Copper-Gold Project,

    VANCOUVER, BRITISH COLUMBIA, September 19, 2012 Millrock Resources Inc. (TSX-V: MRO) ("Millrock" or the "Company") announced today that it has generated a new copper-gold project named Stellar. The project is located in central Alaska 13 km north of the Denali Highway and 68 k

  • A New Copper-Gold Porphyry For Boxxer Gold?

    Boxxer Gold Corp. (TSX.V:BXX) is preparing to drill 26 areas of mineralized skarn and 32 geophysical (IP) targets on its 100% owned Boss porphyry copper-gold project in the Goodsprings Mining District in southern Nevada.

  • (PDF) Skarns in the Porphyry Copper-Gold

    Skarns in the Porphyry Copper-Gold Environment. David Forster. Download with Google Download with Facebook or download with email. Skarns in the Porphyry Copper-Gold Environment. Download. Skarns in the Porphyry Copper-Gold Environment.

  • Gold Deposit Classification: List of 10 Types of

    The Extractive Metallurgy of Gold Gold Deposits Types: List of 10 Gold Deposit Class #1 Pegmatites are igneous rocks formed in the final stage of magma crystallization Porphyry Dyke Coarse-grained granite Albitite Gold Deposit Class #2 Carbonatite Carbonatite Related Gold Deposit Class #3 Auriferous Gold Skarn Type Deposit Gold Deposit Class #4

  • Skarn Wikipedia

    Skarn deposits are economically valuable as sources of metals such as tin, tungsten, manganese, copper, gold, zinc, lead, nickel, molybdenum and iron. A skarn is formed by a variety of metasomatic processes during metamorphism between two adjacent lithologic units.

  • Chesapeake Intercepts Skarn and Porphyry

    21-6-2018· A high grade silver-gold vein field and ore grade zinc-gold skarn-hosted mineralization have been identified at Central and Lucy. The geological and geophysical work to date suggests Yarely could host several porphyry type targets which would be the first known in this region of the country.

  • The Gersdorffite-Bismuthinite-Native Gold Association and

    The Gersdorffite-Bismuthinite-Native Gold Association and the Skarn-Porphyry Mineralization in the Kamariza Mining District, Lavrion, Greece † Panagiotis Voudouris 1,*,Constantinos Mavrogonatos 1, Branko Rieck 2, Uwe Kolitsch 2,3, Paul G. Spry 4, Christophe Scheffer 5, Alexandre Tarantola 6, Olivier Vanderhaeghe 7,

  • Some metallogenic features of gold and

    Abstract. Porphyry copper-gold, skarn copper-gold, sediment-hosted (Carlin-style) gold, breccia pipe, low-sulphidation epithermal gold, pluton-related (mesothermal or orogenic) gold vein and volcanogenic massive sulphide deposits associated with alkaline rocks are commonly broadly similar to those hosted by their calc-alkaline counterparts.

  • Geology and genesis of the giant Beiya

    1. Introduction. The Beiya gold deposit, including the Wandongshan segment that contains ~ 99 million metric tons of ore at an average grade of 2.61 g/t Au (Yunnan Gold and Mineral Resources Corp., pers. Commun., 2014), is the largest known skarn Au deposit in China.

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