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Th e large scale leached cappings involved with porphyry copper systems have long attracted attention both in terms of discovery and general assessment. Within …
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Different styles of mineralisation described below display variations in Au and Ag grade as well as metal ratios and metallurgy. More efficient mechanisms of Au deposition, typically …
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The Toquepala deposit is considered to be an example of a copper–molybdenum porphyry deposit. The deposit is ovoid, extending over a 3.3 x 3.5 km area. Mineralization has been drill tested to about 950 m from the original land surface. Drilling from within the pit base indicates primary mineralization extends for an additional 930 m below the ...
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Two years prior the concentrator was shut down with emphasis on mining and leaching ore from the Bluebird Pit extracting 80,000 tons of ore per day containing 0.45% copper extracted.
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favored leaching. Keywords: black copper ores; copper recovery; refractory ores; pilot scale; column leaching method 1. Introduction Black copper ores are part of the mineralogy of the so-called exotic deposits. Exotic deposits were formed from the oxidation and leaching of primary porphyry copper de-posits (secondary enrichment) [1].
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This process got its first application in the middle of 16 th century in Hungary for copper extraction. The conventional heap leaching uses chemicals as lixiviant such as strong acid for base ...
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Porphyry deposits are the world's most important source of copper, molybdenum, and rhenium, and are major sources of gold, silver, and tin; other byproduct metals include tungsten, platinum ...
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temperature leach experiments of (Kimball et al., 2009; Mathur et al., 2005; Wall et al., 2006) where leach solutions from supergene chalcocite and primary chalcopyrite were …
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The leaching behaviour of copper (Cu) and zinc (Zn) from contaminated soils at the Yongping copper mine were investigated using four extractants, citric acid (CA), oxalic acid (OA ...
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Supergene enrichment in the Morenci porphyry copper deposit was formed as a result of the coupled processes of erosion and chemical weathering that accompanied five stages of landscape evolution in the Cenozoic Era. ... studies revealed that acidophilic iron oxidizing bacteria and dissimilatory sulfate reducing bacteria contributed to leaching ...
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Heap leaching of ore may involve mesophilic or thermophilic (high temperature) microorganisms, i.e., archaea, depending on the mineral species present and the …
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Even in a land known for its giant copper deposits, such as Los Pelambres, Andina, Chuqiucamata Collahausi, the La ndida mine which consists of a series of adjacent porphyry copper deposits stands …
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Mineral processing operation at the Sarcheshmeh porphyry copper mine has produced huge quantities of tailings materials containing sulphide minerals in particular pyrite. These tailings materials were geochemically and mineralogically characterised to assess pyrite and chalcopyrite oxidation, acid mine drainage generation, and trace …
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2. Materials and methods2.1. Mineral samples. Dissolution kinetic experiments were performed either using sulfide concentrates or tailings samples. The tailings samples were taken from different depths (1.0, 1.5, 2.0, 2.95, 4.0, 5.0, 7.0, and 9.0 m) of an oxidation profile of the Piuquenes tailings impoundment, La Andina porphyry …
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The Pebble Cu-Au-Mo deposit in southwest Alaska is one of the world's largest porphyry deposits. The deposit contains over 80 billion pounds (Blbs) Cu, 107 million ounces (Moz) Au, and 5.6 Blbs Mo in all resource categories.
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The supergene enriched and partially oxidised porphyry copper deposit is of Upper Paleocene age (about 57 million years). The deposit is covered by gravels and depth to mineralisation ranges from 80m to 100m below the surface. Oxide and supergene sulphide mineralisation is amenable to heap leaching (atacamite and …
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Where buffer potential of the rock is preserved copper fixation and where it totally eliminated almost complete leaching of copper happened. Consequently, we …
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A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more …
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Molybdenite is the most important molybdenum concentrate, which is mainly recovered as a by-product from porphyry copper deposits. Due to the low efficiency of purification processes such as flotation in the reduction of copper content of molybdenum concentrate to a standard level (i.e., less than 0.5 wt.%), further purification by a …
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leaching porphyry copper profile picture BWZ Heavy Duty Apron Feeder BWZ series heavy duty apron feeder designed by SKT is one new type highefficiency.... Patent US Ammonia extraction of gold and . Gold and silver are extracted from their elemental state or from complex ores and alloys by leaching them with a solution containing ...
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The Role of Bacteria in the Supergene Environment of the Morenci Porphyry Copper Deposit, Greenlee County, Arizona ... of copper in the supergene environment, respectively. The 5200 bench traverses a classic, but tilted, enrichment profile consisting of a 200-m-thick zone of leached capping (0.06% Cu, 0.06% S) that overlies a partially …
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2019, Petersen, J and van Staden, P. Chapter 3. Heap leaching: Pr ocess, principles and practical considerations. pp. 52-78 in: Copper Hydrometallurgy: Principles and Practice. Berend Wassink and ...
Detailsmineralization. Porphyry copper deposits are large (commonly hundreds to thousands of million tonnes) and low to medium in grade (0.3 to 1.5% copper). The majority of gold-rich porphyry deposits occur in the circum-Pacific and commonly contain 0.3 to 1.6 g/t gold. The general characteristics of porphyry systems include:
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Daniela Olivares Sedan. Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate …
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Leach with the opportunity to view many active porphyry Cu-Au style intrusions at varying stages of development, including the relationship with magmatic arc epithermal Au-Ag …
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Ammonia pretreatm ent prior to cyanide leaching, was found to be effective, with a significant improvement in the. extraction of gold from 12.3% to 98.2%, apparently due to the removal of easily ...
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We review pilot and commercial in situ leaching of copper. • We include a table of key variables from previous operations. • We review challenges with flow …
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With ~109,000 Mt of ore, Chile owns 31 porphyry copper deposits ranging in size from 110 Mt to 21,300 Mt and averaging 0.2–1.3% copper, many of which also contain molybdenum, gold and silver (Table A1). 15 of the 31 porphyry copper deposits in Chile are currently being exploited and 7 of them belong to the 20 largest copper mines in the …
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Results and Discussion. It was found from previous stable isotopic work that many porphyry copper deposits were related to the early stage alteration (e.g. potassic) caused by fluids of magmatic origin, and the later stage alteration (e.g. phyllic) superimposed on earlier alteration zones, caused principally by meteoric fluids 27, 28.In …
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isotopic patterns found in the leach cap and quantifies the degree of leaching. A comparison of the isotopic composition of the three reservoirs among the three deposits …
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leaching of copper-bearing ores in the U.S The dissolved copper recovered by this operation was derived from the natural oxidation and leaching of sulfide mineralization in a major porphyry copper deposit located in the headwaters of Bingham Creek. This is the present site of the large-scale, open pit operation at Bingham Canyon, which
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Porphyry copper mineralization typically forms within 1–6 km of the paleosurface ( Seedorff et al., 2005; Singer et al., 2008) and is related to underlying plutons emplaced at 5–15 km paleodepth ( Sillitoe, 2010 ). Some deposits, such as Butte, formed at depths somewhat greater than 6 km and show no evidence of boiling ( Rusk et al., 2004 ).
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