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In particular, sulfides associated with the BIFgold ores (, pyrite, pyrrhotite, and arsenopyrite) and ''background'' sulfides in nonBIF rocks a short distance from the ore zones were analyzed using laser ablation imaging and spot methods to determine their trace element contents and zonation (especially their Au, As, Ag, and Te ...
The Pdbearing minerals are froodite (PdBi2) and michenerite (PdBiTe) ... invariably occurs in the center of zoned cobaltite grains in veins or in disseminated sulfide. Argentian gold (Au Ag ) occurs as small grains in chalcopyrite and in ... pyrrhotite in some sulfide ores from Norway: Mineralogical Magazine, v. 60, p. 303316. ...
ore were evaluated based on the adsorption of gold by ore from the spiked solutions (05 mg/L Au). A free milling gold ore and a "synthetic" pregrobbing gold ore, which was prepared by adding activated carbon to the free milling gold ore, were also tested to confirm the validity of the method adopted.
For that reason, cyanide gold leaching is very efficient when ceramic or high chromium media was used during the grinding of the ore. It can be expected that the leach behaviour would be different if leaching is preceded by preoxidation, as is often done for pyrrhotite bearing ores.
Pyrrhotite of GoldBearing Ores: Composition, Point Defects, Magnetic Properties, Gold Distribution ... It is established that the maximum magnetic induction of pyrrhotite and gold .
Pyrrhotite is an iron sulfide mineral with the formula Fe (1x) S (x = 0 to ). It is a nonstoichiometric variant of FeS, the mineral known as troilite. Pyrrhotite is also called magnetic pyrite, because the color is similar to pyrite and it is weakly magnetic.
Sulfide ores, and pyrites in particular, have caused and continue to cause difficulty in recovering the gold values from these ores. In most instances, visible gold can not be seen under microscopic examination of pyrite gold ores. However, if the ore is ground to 200 mesh, most times, a few specs of gold can be visibly seen under microscopic ...
The source of Au and As for this final, and most economically important, fluidflow event is considered to be from carbonaceous shales deeper in the basin, where original goldbearing diagenetic arsenian pyrite reacts with organic matter and is converted to pyrrhotite, with release of Au, As, and S to the metamorphic fluid.
PYRITE ROASTING, AN ALTERNATIVE TO SULPHUR BURNING M Runkel and P Sturm Outotec , Oberursel GERMANY ... in whole ore gold roasting plants can reach up to 3,800 t/d. ... and was later adapted for the roasting goldbearing minerals.
Cyanidation of a pyrrhotitebearing gold ore. 353 The European Journal of Mineral Processing and Environmental Protection,,, 2003, pp. 353361 Cyanidation of a pyrrhotitebearing gold ore .
Show simple item record. The effect of grinding chemistry on cyanide leaching of gold in the presence of pyrrhotite
Pyrite and pyrrhotite textures and composition in sediments, laminated quartz veins, and reefs at Bendigo gold mine, Australia; insights for ore genesis Economic Geology and the Bulletin of the Society of Economic Geologists (February 2011) 106 (1): 131
Volcanogenic massive sulfide (VMS) deposits are stratabound and sometimes stratiform lenses of polymetallic massive to semimassive sulfides, sulfidic sediments, disseminated replacement ores, and stockwork sulfidebearing veins that occur in submarine volcanic environments. They form at or near the seafloor by syngenetic precipitation from mainly seawaterderived and metalenriched ...
May 14, 2013· Cyanidation of a pyrrhotitebearing gold ore – The European Journal . The Musselwhite Mine in Canada processes a free milling gold ore at . The effect of sulphide minerals and their dissolved ions on ... (decomposition in the CIP and used in elution), the difference between the laboratory results and the plant . »More detailed
PDF | The Musselwhite Mine in Canada processes a free milling gold ore at /t Au and % pyrrhotite. A laboratory investigation was conducted to improve cyanidation. The pyrrhotite was ...
Nov 28, 2016· I. The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing, including physical element, chemical element, and .
The Temagami Greenstone Belt (TGB) is a small billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earth''s lithosphere that forms the core of .
The Musselwhite Mine treats a pyrrhotitebearing ore containing mostly free gold (– g/t Au, % pyrrhotite). The pyrrhotite is both monoclinic (50%) and hexagonal (50%). Cyanidation with the addition of lead nitrate was already part of the plant strategy at the beginning of the project.
Abstract. The extraction process of gold and silver from the gold clay ore containing arsenic and manganese was investigated. With the conventional technique, the leaching rates of gold and silver are % and %, respectively.
Gold is a frequent constituent of skarn deposits, in which it is commonly more abundant than the literature would indicate. Most skarn deposits yield gold as a byproduct of copper and leadzinc mining, but many of these deposits are greatly enriched in gold .
The metamorphism of pyrite and pyritic ores: an overview JAMES R. CRAIG ... bearing rocks is vital to the interpretation of their genesis and postdepositional history. ... Pyrrhotite in pyritic ores has often been attributed to the breakdown of pyrite during metamorphism. It
Pyrite and Pyrrhotite Textures and Composition in Sediments, Laminated Quartz Veins, and Reefs at Bendigo Gold Mine, Australia: Insights for Ore Genesis ... and compositional zoning of pyrite in the goldbearing saddle reefs, quartz veins, and surrounding sedimentary rocks provide new information on the potential source and timing of gold and ...
Sulfideoxide redox mineral distribution in the St. Ives gold camp: ... from pyrrhotitepyrite to magnetitepyrite and hematitepyrite both in space and time. ... systems that localized major Ntrending, reverse, goldbearing shear zones, and D4 produced NEtrending, dextral faults that offset the stratigraphy and earlier fault systems, and ...
Goldbearing veins occur at various localities in the Birimian rocks; the majority are closely ... often raises the gold content. The ore is composed of quartz, calcite, chlorite, iron oxides and sulphide minerals. ... consisting in the main of pyrite, arsenopyrite, chalcopyrite, bornite and pyrrhotite. Pyrite is preponderant and minor ...
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