pyrite in lihir

Evolution of Pyrite Trace Element Compositions from Porphyry-Style ...

Jan 1, 2018 ... Abstract. The Lihir (also known as Ladolam) Au deposit in Papua New Guinea is a telescoped ore deposit, in which volcanic sector collapse(s) led to superimposition of shallow-level Au-rich epithermal mineralization upon preexisting but genetically related, porphyry-style alteration. This superimposition...

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Lihir Gold Mine, Papua New Guinea - Spectral International

LIHIR GOLD MINE,. PAPUA NEW GUINEA. Data Metallogenica. Spectral Case Study: DM_2243. (www.energydigital.com). Source Credit: Data Metallogenica, ... Gold is predominantly fine grained and contained within pyrite and marcasite. ... The deposit is currently operated by Newcrest Mining, who merged with Lihir.

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Lihir Gold - Newcrest Mining Limited

Newcrest – Lihir Gold. Brett Fletcher. Executive ... Lihir. Wafi Golpu. Producing Asset. Namosi. Hidden Valley. Wafi-Golpu g. Advanced Project. Telfer. Namosi. Cracow. Bukina Fasco. Mali. Bukina Fasco. Mali. Mt Rawdon. Cadia Valley ..... Greater than 90% contained pyrite needs to be oxidised. ▫ Sherritt Gordon whole ore...

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Geology of the Kapit Ore Zone and comparative ... - UTas ePrints

Lihir-Tanga-Feni chain of Pleistocene alkalic volcanoes. ... Lihir island is made up of at least five volcanic blocks, and is surrounded by an uplifted Quaternary limestone reef. The Ladolam gold deposit is located on the eastern side ... and 3C (Minifie) quartz-chalcedony-pyrite-cemented breccias and veins, stage 3A (Kapit).

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Lihir Gold Mine, Papua New Guinea - smedg

magnetite, orthoclase, biotite, anhydrite with minor Au (>300 deg C). ♢ Kfeldspar-pyrite – secondary Kfeldspar -> illite, pyrite-arsenian pyrite with encapsulated Au. ♢ Quartz – chalcedony-pyrite-Au with anomalous. Sb and Ba (150-200 deg C). ♢ Geothermal – continuing advanced argillic-argillic alteration...

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The transition from porphyry- to epithermal-style gold mineralization ...

The exceptionally large gold resource at Ladolam (>1300 metric tons of gold), Lihir Island, resulted from the transition of an early-stage, low-grade porphyry gold system ... The breccias are cut by late-stage epithermal quartz–chalcedony–illite–adularia–pyrite veins and associated illite–adularia alteration that locally contain...

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to epithermal-style gold mineralization at Ladolam, Lihir Island ...

stockwork veins. The breccias are overprinted by bio- tite–magnetite alteration and their matrix is strongly mineralized with disseminated auriferous pyrite. The breccias are cut by late-stage epithermal quartz–chalce- dony–illite–adularia–pyrite veins and associated illite– adularia alteration that locally contain bonanza gold.

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Differential Oxidation of Iron Sulfides to Modify the Au ... - UQ eSpace

Product at Lihir. Joseph John. Bachelor of Pharmacy. Master of Pharmacy. Master of Biotechnology. Master of Chemical Engineering. A thesis submitted for the degree of Doctor of Philosophy at. The University of ... Sulfide associated refractory gold ores hold a majority of the gold within the pyrite, which has several forms.

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Lihir Facts - Geology

Pyrite is the dominant sulphide throughout the mineralised zone in all alteration types with marcasite as an accessory sulphide. Both appear to have replaced pyrrhotite in part. In the 'boiling zone', pyrite occurs as coarse, coalescent masses coating breccia voids, single euhedra, and fine dissemination to...

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Ladolam Gold Deposit, Lihir Isla - CiteSeerX

has an average grade of 2.52 g/t Au (Lihir Gold Limited,. 2008). The gold is hosted predominantly in refractory pyrite. Average autoclave gold feed grade for the processing plant in. 2007 was 5.51 g/t Au (Annual Report, Lihir Gold Limited,. 2007). The Ladolam gold deposit is composed of four main ore zones: Minifie, Lienetz...

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shallow - Ministry of Energy and Mines

The ore minerals are dominantly sphalerite, tetrahedrite and Pb-sulphosalts with lesser freibergite, galena, pyrite, electrum, amalgam and minor arsenopyrite. ... extensive hot spring and fumarolic activity and locally have produced large porphyry copper and epithermal gold deposits (e.g., 40 million oz. megadeposit at Lihir).

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Jason Robertson - Process Manager & Alternate Registered ...

A key success factor at Lihir gold processing plant has been my focus on the training and development of our National workforce creating an environment of ... Telfer is a 22Mt concentrator producing gold through copper / gold floatation concentrate, gravity recovery, leaching pyrite concentrate and dump leach facility.

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ALACRANITE, As4S4: A NEW OCCURRENCE, NEW ... - RRuff

seafloor around Lihir Island in Papua New Guinea. Sampling of Conical Seamount resulted in the discovery of an unusual occurrence of alacranite and realgar associated with polymetallic vein mineralization consisting of pyrite, sphalerite, galena, minor chalcopyrite and sulfosalts, along with intense clay and silica...

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Special Publication, No. 9 (PDF) - SEG - Store

Results 1 - 17 of 17 ... Paper 8: The Neves-Corvo Deposit, Iberian Pyrite Belt, Portugal: Impacts and Future, 25 Years after the Discovery. Media: PDF (1.1 MB). Pages: 155-176 .... Paper 16: Ladolam Gold Deposit, Lihir Island, Papua New Guinea: Gold Mineralization Hosted by Alkaline Rocks. Media: PDF (274 KB). Pages:.

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New Hanover - Ironside Resources

The project comprises two exploration licences (EL 1566 & ELA 1856: PPM 100%) covering 591.6 km2 at the northwestern end of the Lihir-Tabar alkaline volcanic ... It was during this work that a quartz-pyrite-haematite-zeolite-alunite breccia phase (advanced argillic alteration) was mapped as part of a Late Miocene-Early...

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Mt Rawdon – Evolution Mining

... with Lihir Gold Limited; 2010: Lihir Gold Limited Merger with Newcrest; 2011: 1Moz gold produced since commissioning; 2011: Evolution acquired 100% of Mt Rawdon via Catalpa ... The gold mineralisation is closely associated with fine disseminated pyrite within the host rocks as well as more discrete sulphide veinlets.

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Cinnabar, arsenian pyrite and thallium-enrichment in active shallow ...

Cinnabar, arsenian pyrite and thallium-enrichment in active shallow submarine hydrothermal vents at Paleochori Bay, Milos Island, Greece ... the present study resemble hydrothermal products from other shallow water venting areas elsewhere: Lihir and Ambitle Islands, Papua New Guinea, Kraternaya Bight, Kuriles, Russia...

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Polymetallic massive sulphides and cobalt-rich ferromanganese crusts

including pyrite, sphalerite, and chalcopyrite eventually accumulate at and just below the seafloor .... Commonly, pyrite and sphalerite are the dominant sulphides. ..... plant on Lihir. If this scenario becomes reality, it will have a very significant impact on the future development of seafloor mining for base and precious metals.

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Telescoped porphyry‐style and epithermal veins and alteration at ...

Feb 25, 2004 ... illite, interlayer illite-smectite (<10% smectite), chlorite, pyrite, ankerite, and dolomite. Late-stage epithermal veins and alteration are characterised by the formation of calcite and siderite veinlets, coupled with overprinting of the wall rocks by both these minerals. Multiphase fluid inclusions in a porphyry-style...

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Environmental Impacts of terrestrial mining - SPC-EU Deep Sea ...

Aug 17, 2012 ... Lihir Gold Mine – Submarine Tailings Disposal. - Gold Ridge Gold Mine – Tailings Dam. • Deep Sea Mining and .... that are associated with sulphide minerals (e.g. Cu and Au mines);. • Pyrite and Marcasite (FeS. 2. ) .... Mining Impacts at Lihir… Terrestrial and marine impacts. Massive clearing of vegetation.

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Submarine Tailings Disposal - MDPI

Jul 8, 2014 ... Chalcopyrite, bornite, chalcocite-digenite, covellite sphalerite, galena. Pyrite, Enargite, tetrahedrite-tennantite, e.g., As,. Se, Th, Cr, Cu, Zn, Ni, Cd, Pb. AMD .... Lihir Island, Papua New Guinea (Au). 13. Levisa .... example, sulphides like pyrite (FeS2), the most abundant iron sulphide mineral and main mineral.

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Tailings - Wikipedia

Tailings, also called mine dumps, culm dumps, slimes, tails, refuse, leach residue or slickens, terra-cone (terrikon), are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are distinct from overburden, which is the waste rock or other material...

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Solfotara Mining Corp. - Biliran Epithermal Gold Project

The Biliran Gold-Sulphur Project covers a large area of the island of Biliran, accessible by road from Leyte. The project consists of two EPA's covering 12418 hectares ( 124 sq. km).

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The modular Python processing plant – designed ... - Gekko Systems

May 2, 2010 ... May 2010. MINERALS & METALLURGICAL PROCESSING. 2. Figure 1 — Python underground distributed system. tor (VSI). The VSI, see Fig. 2, uses rock-on-rock crushing to liberate minerals at the grain boundaries. Figure 3 shows pyrite crystals liberated from Lihir Gold's Ballarat Goldfields ore. Typically...

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Machine learning in the mining industry — a case study - Medium

May 30, 2017 ... Newcrest extracts gold from ore at their Lihir Gold operation in Papua New Guinea. This ore is rich is sulphide minerals (sulfide if you're American) such as iron pyrite (FeS2) (aka “Fool's Gold”). Yes, there's real gold among the fool's stuff. Sulphides inhibit the processing techniques used to extract gold from...

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Harmony Gold Mining Co.Ltd Wafi Gold Project Golpu Copper-Gold ...

Lihir. 442. 3.14. 44.62. 1,388. Ok Tedi. 482. 0.91. 14.10. 0.85. 9.03. 1,074. Frieda River. 468. 0.42. 6.32. 0.70. 7.22. 705. Porgera. 134. 4.43. 19.09. 594. Golpu. 114. 0.71. 2.60. 1.43. 3.59. 334. Wafi. 72. 2.70. 6.25. 194 .... Gold associated with fine-grained arsenical pyrite. • Gold associated with fine-grained arsenical pyrite.

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Marine and Riverine Discharges of Mine Tailings - Craig Vogt Inc

Oct 18, 2013 ... Upper right: Lihir mine dump site and tailings discharge location in Papua New Guinea. Source: ..... At the Lihir mine in Papua New Guinea, an independent oceanographic assessment showed that ...... Mine tailings and waste rock naturally include sulfide minerals (such as pyrite, pyrrhotite, marcasite),.

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Claire Chamberlain , Adam Bath , Jacqueline ... - Geoscience BC

Chalcopyrite-pyrite-anhydrite-K-spar replacement mineralization. Chalcopyrite-bornite cemented breccia, with late-stage zeolites - Northeast Zone. Chalcopyrite-bornite cemented breccia, with late-stage zeolites - Northeast Zone. Alkalic epithermal deposits. Lihir: Auriferous pyrite vein, Ladolum deposit. (DDHL 227, 106.4...

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Papua Mining plc - Proactive Investors

Feb 1, 2018 ... Important Information. This presentation has been prepared by Papua Mining plc (“PML” or the “Company”). It should not be considered as an offer or invitation to subscribe for, or purchase any, securities in the Company or as an inducement to make an offer or invitation with respect to those securities.

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Low sulphidation epithermal Au-Ag deposits are ... - Greg Corbett

Quenched very fine pyrite is commonly arsenean and locally displays difficult metallurgy (Lihir), while coarser sulphides are typically associated with near surficial supergene Au enrichment. • Carbonate-base metal Au deposits overprint quartz-sulphide Au, display higher. Au contents, increased Ag:Au ratios, with additional...

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Refractory Gold Ore Treatment Methods - 911 Metallurgist

Jan 11, 2018 ... ... the public domain. Pressure oxidation (POX) remains a further option for the oxidation of refractory sulfides. Several projects have been recently constructed: the Killita Project in Finland, the Amursk Project in Russia, the Pueblo Viejo Project in the Dominican Republic, and the MOPU expansion at Lihir.

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Fluid mixing as a mechanism for producing bonanza grade ...

good. Rapid cooling is recognised in some Au (Lihir, Kerimenge, Papua New Guinea) and. Ag (Corani, Peru) deposits, where native gold or Ag minerals are often included in fine grained sulphides and may be difficult to beneficiate. Terry Leach studied Au at. Lihir encapsulated within arsenean pyrite (Corbett et al., 2001).

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Volcanic Minerals - Volcano World

Lihir Island is an epithermal deposit discovered in 1982. The island is made ... Chimneys formed at the ridges have as much as 29 weight % zinc and 6 weight % copper in sulfide minerals (pyrrhotite, pyrite, sphalerite, and chalcopyrite). ... This photo shows pyrite in silicified tuff from a VMS deposit in eastern Java, Indonesia.

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Mount Rawdon - Mining Atlas

The gold mineralisation is closely associated with fine disseminated pyrite within the host rocks as well as more discrete sulphide veinlets. Gold grade ... began in 2001. In September 2010 Newcrest assumed ownership of the Mt Rawdon Operation following the merger of Newcrest Mining Limited and Lihir Gold Limited.

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Understanding Low Sulphidation (LS) Epithermal Deposits - CEO.ca

LS Epithermal deposits are major sources of gold and silver. Lead and zinc are common at depth and there is usually a good correlation between silver and lead grades. Copper may be present in the deepest levels of some systems. FDN – 25.4 Mt @ 8.21 g/t. Au, 11.0 g/t Ag (P+P, Dec. 2012). Lihir –. 870 Mt @ 2.0 g/t Au.

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Gold - New Zealand Petroleum and Minerals

contain native gold, pyrite, uraninite, brannerite and traces of platinum group minerals in gold-bearing “reefs” or ... quartz, carbonate, pyrite, arsenopyrite and minor native gold and base metals. Examples of Archean age ... Kelian in Indonesia; and Ladolam (Lihir) in Papua-New. Guinea. Hot Spring examples include Broken...

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1-Epithermal Deposits.pptx - CUSO

Classification of sub-types. • there are two major sub-types of epithermal deposits. • different names have been used for them: Low sulfur/high sulfur – Bonham, 1986. Low sulfidation/high sulfidation – White & Hedenquist, 1990. Adularia-sericite/acid sulfate – Heald et al., 1987. Adularia-sericite/kaolinite-alunite – Berger and...

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Galvanic enhancement for high pressure leaching of chalcopyrite

DOI:10.2298/JMMB150723022K. 1. Introduction. Pressure oxidation (POX) at elevated temperature. (110-225oC) and pressure (0.4-3 MPa) has been widely used for oxidising pyrite to liberate gold and precious metals from refractory ores for further processing. The technology has been practised for over 20 years [1] at Lihir...

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July-Dec 2011 Bulletin

Jul 27, 2011 ... Lihir. Tolukuma. Simberi. Sinivit. Hidden Valley. MINES UNDER CONSTRUCTION. Ramu. Solwara 1. ADVANCED EXPLORATION. Frieda River .... mine due to the burst of the pyrite waste storage facility, in May 2011. Produc ... Production from other mines, including Porgera and Lihir dropped compared to.

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Modern Hydrothermal Activity, Formation of Complex ... - Zobodat

Profilen zwischen der Insel Lihir und dem Emirau-Feni-Rücken kartiert sowie auf der gesamten Strecke der Überfahrten, ... Lihir Island and the Emirau-Feni Ridge, as well as along the route of travel to the primary region investigated ..... pyrite, marcasite, melnikovite-pyrite and in places chalcopyrite. Galena can be observed.

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