In addition, submicroscopic (solid solution) gold, principally in arsenopyrite and pyrite, is also important. The main causes of refractory gold ores are submicroscopic gold, the AuAg tellurides, and very finegrained gold (<10 µm) locked in sulfides. Other types of problem gold ores include coppergold ores and pregrobbing carbonaceous ores.
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gold ores can be classified into 11 types (Table 1). Some metallurgical implications to these gold ore types are summarised below: Placers, quartz vein gold ores and oxidized ores: Generally, placers, quartz vein gold ores and oxidized ores are freemilling and gold can be recovered by gravity and/or direct cyanide leaching.
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To know what type of rock is gold associated with you must see that the minerals most common in placer deposits are platinum, iridosmine, magnetite, iron pyrites, ilmenite, zircon, garnets, rutile and barytes wolfram, scheelite, brookite and diamonds are less common. Diamonds are associated with gold in Brazil, and also occasionally in the Urals and in the United States. In auriferous quartz
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Gold/Auriferous Deposits can be classified into types for which here is a List of 10 Types of Gold Deposits: Auriferous porphyry dykes, sills, and stocks Auriferous pegmatites coarsegrained granitic deposits + albitite. Carbonatites and carbonatiterelated deposits. Auriferous skarn and gold skarn type deposit. Gold/Silver and viseversa veins, lodes, mineralized pipes and irregular
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There are two major groups of arsenical gold ores of economical value. These are the massive base metal sulphides with arsenical gold (i.e. the leadzinc Olympias deposit, Greece) and arsenical gold ores without the presence of base metals. Massive, base metal arsenical gold ores are rare, and there are only a few deposits in the world.
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Gold in refractory sulfide ores occurs as fine inclusions or in solid solution typically within pyrite, marcasite, and arsenopyrite grains. In this type of ore, because the gold is encapsulated, the interaction with cyanide to form the soluble metal complex is inhibited (Marsden and House, 2006, La Brooy et al., 1994).
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There are four types of gold ore including: Hydrothermal Epigenetic Deposits. Such as mesothermal lode gold deposits, Archaean conglomerate hosted golduranium deposits, and Carlintype gold deposits (such as epithermal stockwork vein deposits) GraniteRelated Hydrothermal Deposits
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