(PDF) Major and Trace Element Geochemistry of Pyrite

2018-9-1  The Dongguashan copper (gold) deposit in Anhui Province is one of the largest copper (gold) deposits in the Tongling ore district, which is the most important region in the Middle–Lower Yangtze...

Romios Drilling Discovers 4 Overlapping Copper-Gold

2019-12-5  Metal recoveries of 100% were applied to the gold and copper values. Gold and Copper-enriched pyrrhotite formations within mafic and felsic volcanics. The best intercept of this type of mineralization was 4.2 m grading 1.94 g/t Au and 0.14% Cu in hole RGR-19-007 (Table 1).

Magmatic sulfides and Au:Cu ratios in porphyry

1999-3-1  The behavior of copper and gold in the phase assemblage: pyrrhotite (Po)–intermediate solid solution (Iss)–haplogranitic melt–gold metal (capsule) at 850°C, 100 MPa and gas saturation (aH2O ≈0.9) has been investigated. The results are presented as Nernst partition coefficients.

(PDF) Reduced porphyry copper-gold deposits: A new

2000-6-1  Hollister (1992) ascribed a gold "porphyry" model for the Fort Knox deposit; however, as similarities with copper "porphyry" deposits were few, the term never gained acceptance.

Magmatic sulfides and Au:Cu ratios in porphyry

The behavior of copper and gold in the phase assemblage: pyrrhotite (Po)–intermediate solid solution (Iss)–haplogranitic melt–gold metal (capsule) at 850°C, 100 MPa and gas saturation (a H 2 O ≈0.9) has been investigated. The results are presented as Nernst partition coefficients.

Gold Pyrite, Pyrrhotite and Arsenopyrite Recovery

2018-4-15  Next. One of the more common classes of ores containing gold is when gold is associated with pyrite, pyrrhotite, and arsenopyrite. This is the area of gold recovery that has probably received the most research and plant optimization support

Copper-Gold Skarn Mineralization at the Karavansalija

2015-10-1  In the overlying volcanoclastics, the studied sulfide mineralization is represented mainly by arsenopyrite aggregates with subordinate amounts of pyrite and chalcopyrite. Gold is present rarely as visible aggregate of native gold and also as invisible element included in arsenopyrite.

Cyanidation of a pyrrhotite-bearing gold ore

2015-12-27  The pyrrhotite was found to be 50% hexagonal and 50% monoclinic, using XRD, which is a semi-quantitative method. The cyanidation tests, performed on finely ground material (89% -37µm), indicated that 97.8% of the gold is leachable (0.12g/t Au in the tails; performed in duplicate). The remaining gold is probably locked in sulphide minerals.

The Raúl-Condestable Iron Oxide Copper-Gold

2009-5-1  The main ore stage is characterized by two end-member mineral associations that were formed according to (1) an oxidized deposition sequence (hematite-magnetite-pyrite-chalcopyrite) occurring in and near feeder structures, and (2) a reduced deposition sequence (pyrrhotite-pyrite-chalcopyrite) found in volcaniclas-tic rocks and veins.

cyanidation of a pyrrhotite bearing gold ore

PDF Cyanidation of a pyrrhotite-bearing gold ore . Cyanidation of a pyrrhotite-bearing gold ore. The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. Get Price

Romios Drilling Discovers 4 Overlapping Copper-Gold

2019-12-5  Gold and Copper-enriched pyrrhotite formations within mafic and felsic volcanics. The best intercept of this type of mineralization was 4.2 m grading 1.94 g/t Au and 0.14% Cu in hole RGR-19-007 (Table 1). The intercepts in holes RGR-19-007, 008 and 011 are continuous over a length of 100 m and appear to be the source of a 3-400 m long conductor

(PDF) Copper, gold and silver enrichment in ore

Copper, gold and silver enrichment in ore mylonites within massive sulphide orebodies at Hongtoushan VHMS deposit, N.E. China. Ore Geology Reviews, 2007. Khin Zaw. Pyrrhotite coexists with pyrite, pyrrhotite and sphalerite, chalco- pyrite always shows preferential replacement by sili- Pyrrhotite comprises 20% to 80% of the ore minerals

Exploring for copper-gold deposits with time-domain

2016-12-6  presence of copper-gold mineralization or with magnetite, pyrrhotite or pyrite hosted in barren rocks. This information gathered during the geological and geophysical data compilation provided a better understanding of the property. Mineralization is concentrated in networks of

Copper-Gold Skarn Mineralization at the Karavansalija

Copper-Gold Skarn Mineralization at the Karavansalija Ore Zone, Rogozna Mountain, Southwestern Serbia. Zhivko D. Budinov, Kotaro Yonezu, Geothermometry, based on EPMA data of arsenopyrite co-existing with pyrite and pyrrhotite, suggests a temperature range of 240-360°C for the formation of the arsenopyrite, which overlaps well with the

Exploring for copper–gold deposits at Opemiska

2018-4-13  copper–gold vein orientations. The Opemiska ore, referred in the literature as Opemiska-type Cu-Au veins (Pilote, 1998; Leclerc et al. 2012) consists of semi-massive to massive chalcopyrite associated with ± pyrite– pyrrhotite–magnetite. The veins are narrow but are high-grade (Salmon, 1982). Silver is found in variable quantities associated

GB Copper-Gold Project Nexus Gold Corp.

The Company is acquiring the Project to investigate the gold potential based on anomalous gold occurring in outcrop which graded up to 4.2 g/t Au. In addition to the gold showing, several large boulders containing pyrrhotite, pyrite and chalcopyrite have been discovered to the south west which have returned assays ranging from 2.76 4.02 % Cu.

COPPER MINERALISED SYSTEM ASX RELEASE

2020-9-6  The rare earth bearing skarn zone at Koppany is bounded on its western side by copper-bearing pyrrhotite (FeS 2) zones that correspond to a series of strong VTEM responses occurring over a 5.6 km strike length. This area represents a significant Iron-Sulphide-Copper-Gold (“ISCG”) target. Other examples of ISCG

Cyanidation of a pyrrhotite-bearing gold ore

2015-12-27  The pyrrhotite was found to be 50% hexagonal and 50% monoclinic, using XRD, which is a semi-quantitative method. The cyanidation tests, performed on finely ground material (89% -37µm), indicated that 97.8% of the gold is leachable (0.12g/t Au in the tails; performed in duplicate). The remaining gold is probably locked in sulphide minerals.

Yuinmery Copper-Gold Project Empire Resources

The Yuinmery Copper-Gold project is located in the Mid-West region of Western Australia and consists of five granted tenements, two mining and three exploration, for a total area of 84.5 km 2.The project has a current JORC 2012 Resource of 2.52Mt @ 1.31% Cu, 0.49g/t Au and 1.76g/t Ag using a 0.5% Cu cut-off (refer ASX:ERL announcement “Updated copper-gold Resource Yuinmery Project” 17 May

cyanidation of a pyrrhotite bearing gold ore

PDF Cyanidation of a pyrrhotite-bearing gold ore . Cyanidation of a pyrrhotite-bearing gold ore. The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. Get Price

Exploring for copper-gold deposits with time-domain

2016-12-6  presence of copper-gold mineralization or with magnetite, pyrrhotite or pyrite hosted in barren rocks. This information gathered during the geological and geophysical data compilation provided a better understanding of the property. Mineralization is concentrated in networks of

Exploring for copper–gold deposits at Opemiska

2018-4-13  copper–gold vein orientations. The Opemiska ore, referred in the literature as Opemiska-type Cu-Au veins (Pilote, 1998; Leclerc et al. 2012) consists of semi-massive to massive chalcopyrite associated with ± pyrite– pyrrhotite–magnetite. The veins are narrow but are high-grade (Salmon, 1982). Silver is found in variable quantities associated

Bull River Copper-Silver-Gold Prospect, Purcell

copyrite and pyrrhotite, with barite and quartz gangue, contained 4.77 grams/tonne gold, 161.5 grams/tonne sil-ver and 13 percent copper. Gold content in the five sam-ples collected underground ranged from 0.16 to 1.135 grams/tonne, with a median of 0.71 grams/tonne. Silver content in these samples ranged from 13.2 to 95.4

Hammer Metals makes new copper-gold discovery at

2021-1-20  The Trafalgar prospect comprises a north-northeast copper-gold trend located on the regional scale Fountain Range Fault. It forms part of an extensive copper-gold soil anomaly which stretches for 2.7km and contains copper mineralisation of predominantly chalcopyrite with a peripheral magnetite alteration halo and central pyrrhotite component.

cyanidation of a pyrrhotite bearing gold ore

Cyanidation of gold ores containing copper silver lead Jul 01 2010 The first sample was a high grade ore and its gold and arsenic grades were and g/t respectively and the second sample was a low grade ore with g/t of Au and low arsenic ( g/t) but high silver Cyanidation Of A Pyrrhotite Bearing Gold Ore Since the 1890s, cyanide has been used

The Lac Troilus Gold-Copper Deposit, Northwestern

hanging wall. Calcium is depleted in all altered rocks adjacent to the copper-gold mineral- ization. The copper and iron sulfide minerals and gold show similar zoning patterns. The core area is characterized by a chalcopyrite-pyrrhotite-rich assemblage. Proceeding toward the struc- tural hanging wall, there is a gradual decrease in chalcopyrite

cyanidation of a pyrrhotite bearing gold ore

PDF Cyanidation of a pyrrhotite-bearing gold ore . Cyanidation of a pyrrhotite-bearing gold ore. The Musselwhite Mine in Canada processes a free milling gold ore at 5.5-5.8g/t Au and 4.2% pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was determined to be 50% monoclinic and 50% hexagonal. Get Price

06 September 2017 MASSIVE SULPHIDE COPPER-GOLD

2017-9-5  Lead-Silver and Copper-Gold Project in South Korea (inset, Figure 1). The massive sulphide zone was discovered during follow up of a 4,162ppm copper (0.42% Cu) soil anomaly at the eastern end of the Taipan Prospect. The outcropping massive sulphide zone strikes

COPPER MINERALISED SYSTEM ASX RELEASE

2020-9-6  COPPER MINERALISED SYSTEM CONFIRMED AT SHADOW HIGHLIGHTS • Broad intersections of copper and associated gold have been reported in the two holes drilled at the Shadow prospect at the Mt Isa East Joint Venture • Drilling at Shadow outlined a wide mineralised zone associated with the Shadow Breccia and more significantly a silicified magnetite alteration zone on

Cobre Limited (ASX:CBE) Significant High-Grade

Cobre Limited (ASX:CBE) is a copper and base-metals explorer with projects in Western Australia and Botswana. The Company recently discovered a new high-grade VMS deposit enriched in Copper, Gold, Zinc and Silver in Western Australia, and is currently exploring approximately 8,100 km2 of tenements within the Kalahari Copper Belt (KCB) in Botswana.