Where is the enrichment zone of copper ore

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  Global constraints on exhumation rates during porphyry copper

  — Currently 60% of the world s copper production comes from porphyry copper deposits often significantly enriched by surface weathering This paper uses new global datasets and previous work to review the critical processes required for porphyry copper formation and supergene enrichment Porphyry copper formation requires a

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  What Is Secondary Enrichment In Geology Science

  — This is particularly noted in copper ore deposits where the copper sulfide minerals chalcocite Cu2S covellite CuS digenite Cu18S10 and djurleite Cu31S16 are deposited by the descending surface waters How to recognize secondary enrichment in porphyritic copper systems Sulfide ore zone a deeper zone of hypogene alteration

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  Mineralogical and chemical characterization of supergene copper bearing

  — Supergene copper mineralization SCM is produced by the interaction between sulfides and supergene processes and was originally defined by Ransome 1912 as sulfide oxidation and leaching of ore deposits in the weathering environment and any attendant secondary sulfide order to form supergene copper mineralization

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  Supergene Mass Balance Study Assuming Zero Lateral Copper

  — Mass Balance Concepts Modeling of mass balance was carried out for PCDs at Butte Montana Brimhall et al 1985; Ague and Brimhall 1989 La Escondida Chile Alpers and Brimhall 1989 and El Salvador Chile Mote et al 2001 Generally mass balance is based on the difference of metal mass between the enrichment and leached

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  Metallogenesis and major challenges of porphyry copper

  — Porphyry copper±molybdenum±gold deposits PCDs are the most representative magmatic hydrothermal metallogenic system above subduction zones with important economic value Previous studies revealed that large PCDs are generally formed from initial arc magmas from subduction induced partial melting of the mantle wedge

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  Characteristics of Ore Forming Fluids and Genesis of the First Mining

  — The Pulang copper deposit formed in the Late Triassic is the largest porphyry Cu Mo Au deposit in the eastern Tethys and its genetic type and mineralization potential have received widespread attention Identifying the characteristics of ore forming fluids and the sources of ore forming materials in the deep and peripheral ore bodies of

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  PDF The formation of porphyry copper deposits

  — The Tongshan copper deposit areas a typical of many ore bearing plutons in the Anqing Guichi district of the LYRB is located at the margin of Guichi district Fig 1a

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  1 Froth Flotation Fundamental Principles

  — e Enrichment Ratio is calculated directly from assays as c/f weights are not involved in the calculation Example Calculations Problem A copper ore initially contains % Cu After carrying out a froth flotation separation the products are as shown in Table 1 Using this data calculate a Ratio of concentration b % Metal Recovery

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  Copper Cu Ore Minerals Occurrence » Geology Science

  — Copper Cu ore is a naturally occurring mineral deposit that contains copper in varying concentrations It is an important industrial metal that has been used by human civilizations for thousands of years due to its excellent electrical and thermal conductivity high ductility and resistance to corrosion Copper is widely used in various

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  Geometallurgical Modeling of the Escondida Deposit Mining

  — This leaching zone is underlain by a NW trending enrichment zone that covers an area of by km that has largely been extracted by historical mining Fig 3c Northwest trending faults fractures and veins within the structural corridor combined with higher hypogene copper contents appear to have been the main controls on both the

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  Generation of porphyry copper deposits by gas brine

  — trigger both copper enrichment and the subsequent precipitation of sulphide ore minerals within a zone of hydrothermally altered rock Here we draw on observations of modern subduction zone

  Mineralogical and chemical characterization of supergene copper bearing

  — Supergene copper mineralization SCM is produced by the interaction between sulfides and supergene processes and was originally defined by Ransome 1912 as sulfide oxidation and leaching of ore deposits in the weathering environment and any attendant secondary sulfide order to form supergene copper mineralization

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  Supergene Silver Enrichment Reassessed GeoScienceWorld

  — Such copper oxide and sulfide deposits were discovered and evaluated by drilling done by Codelco from 1996 through 2007 during a brownfield exploration program driven by the necessity to replace and increase leacheable ore consumed by the Chuquicamata and Radomiro Tomic operations 30% of the deposits contain ed

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  The mobility of copper zinc molybdenum and tungsten in

  Porphyry type ore deposits are closely associated with subduction zones but the ultimate source of the metals in these deposits is still uncertain To test whether aqueous fluids from the subducted slab may contribute to the metal enrichment we investigated the partitioning of Cu Zn Mo and W between saline aqueous fluids and the subducted basaltic crust at

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  Metal contamination of agricultural soils in the copper mining

  — The study was intended to investigate the heavy metal contamination in the agricultural soils of the copper mining areas in Singhbhum shear zone India The total concentrations of the metals were determined by inductively coupled plasma mass spectrometer ICPMS ICPMS Pollution levels were assessed by calculating

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  What Is Secondary Enrichment In Geology Science

  — This is particularly noted in copper ore deposits where the copper sulfide minerals chalcocite Cu2S covellite CuS digenite Cu18S10 and djurleite Cu31S16 are deposited by the descending surface waters How to recognize secondary enrichment in porphyritic copper systems Sulfide ore zone a deeper zone of hypogene alteration

  Topic 9 Supergene Enrichment ResearchGate

  — Morphology of Zoning Zone of oxidation The oxidized part The region above the water table in an ore deposit is known as the oxidised zone as it is the zone of oxidation of the primary ore

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  The formation of porphyry copper deposits Acta

  — Copper is a moderately incompatible chalcophile element Its behavior is strongly controlled by sulfides The speciation of sulfur is controlled by oxygen fugacity Therefore porphyry Cu deposits are usually oxidized with oxygen fugacities > ΔFMQ 2 Mungall 2002; Sun et al 2015 The problem is that while most of the magmas at

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  Hypogene enrichment in Miduk porphyry copper ore

  — This study was planned with the aim of identifying the nature and circumstances of the high graded central core and increasing trend of copper content through depth of 1000 m in Miduk PCD Mechanisms of high grading refer to hypogene enrichment HE in PCDs poorly understood Two main hypotheses for hypogene

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  Phyllic alteration and the implications of fluid composition at

  — Unlike most porphyry Cu deposits of the southwestern Copper Flat lacks a well developed and economically important supergene enrichment zone Dunn 1982 It is also a low sulfur hydrothermal system Dunn 1982 McLemore et al 1999 and has an incipiently developed phyllic alteration zone that contains some atypical minerals

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  Physical transport of magmatic sulfides promotes copper enrichment

  — This sequence of processes gives magmatic sulfides an active role in ore metal transport and enrichment to form porphyry copper deposits and may have global implications for crustal Cu budgets

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  What Is Secondary Enrichment In Geology Science

  — This is particularly noted in copper ore deposits where the copper sulfide minerals chalcocite Cu2S covellite CuS digenite Cu18S10 and djurleite Cu31S16 are deposited by the descending surface waters How to recognize secondary enrichment in porphyritic copper systems Sulfide ore zone a deeper zone of hypogene alteration

  Mineralogical and chemical characterization of supergene copper bearing

  — Supergene copper mineralization SCM is produced by the interaction between sulfides and supergene processes and was originally defined by Ransome 1912 as sulfide oxidation and leaching of ore deposits in the weathering environment and any attendant secondary sulfide order to form supergene copper mineralization

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  Controls on supergene enrichment of porphyry copper

  The Central Andes host some of the world s largest porphyry copper deposits The economic viability of these deposits is dependent on the size and quality of their supergene enrichment blanket Published models that have strongly influenced exploration policy suggest that supergene enrichment ceased at 14 Ma due to an increase in aridity Here we discuss

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  Oxidation supergene enrichment PPT SlideShare

  — Distribution characteristics and enrichment mechanism of Re in molybdenite by using EPMA LA ICP MS mapping and XRD were systematically studied The molybdenite the main Re bearing mineral at

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  Copper mining and production Institute for Rare Earths and

  Copper ore enrichment The ore is enriched by a process called foam flotation Unwanted material called gangue sinks to the floor and is removed The enrichment of the copper ore is carried out by flotation flotation The ground ores are stirred with water Metal sulfides and metal oxides repel water while the rocks of the gangue quartz

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  Copper and Coal Resources SpringerLink

  — Copper carbonate and oxide minerals form more or less in situ in the near surface oxidised zone whereas copper liberated from the breakdown of copper sulfide minerals may also migrate downwards and be precipitated as native copper and secondary copper and copper iron sulfides such as covellite chalcocite and bornite in the reducing