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Tesis sobre el tema "Copper ores"

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Publicado: 4 de junio de 2021
Última modificación: 8 de octubre de 2024

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1

Seifelnassr, A. A. S. "Bacterial aided percolation leaching of copper sulphide ores." Thesis, Bucks New University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234445.

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2

Groenewald, Nico Albert. "Measuring the dielectric properties of crushed copper ore." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5230.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Previous work has shown that microwave heating of mineral ores induces micro cracks within the ore structure, which can be attributed to the difference in the adsorption of microwaves amongst the different mineral phases. This reduces the energy required during subsequent grinding and enhances the liberation of valuable minerals. In order to design microwave applicators for this purpose, knowledge of the effective dielectric properties of the crushed ore is required. Of particular interest is the
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3

Gendall, Ian Richard. "The porphyry copper system and the precious metal-gold potential." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005604.

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It has been established that porphyry copper/copper-gold deposits have formed from I Ma to 2 Ga ago. Generally, they are related to the Mesozoic-Cenozoic interval with few reported occurrences from the Palaeozoic or Precambrian. A reason cited is the erosion of these deposits which are often related to convergent plate margins and orogenic belts. Observations of the alteration and mineralisation within and around porphyry copper/copper-gold systems have been included in numerous idealised models. These alteration and mineralisation patterns are dependent on the phases of intrusion, the tectoni
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4

Sainath, Narayana Rangaiah 1968. "Dynamic behavior of flow during leaching of copper ores." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/291737.

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The objective of this investigation was to experimentally determine the variation in the flow characteristics of tactite copper ores during the leaching process. The laboratory work involved estimation of porosity and permeability of cores before leaching, and after various intervals of leaching. The tests were carried out using specimens of diameter 1.5 and 4.0 inches, prepared from boulders obtained from the Cyprus Casa Grande mine. A solution containing about 25 grams of sulfuric acid per liter was used as the lixiviant. Porosity was determined using the water saturation method. The permeab
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5

Crane, Martin John, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Geochemical studies of selected base metal minerals from the supergene zone." THESIS_CSTE_SFH_Crane_M.xml, 2001. http://handle.uws.edu.au:8081/1959.7/232.

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Acid leaching of different natural chrysocolla samples under ambient conditions demonstrated that the chemical and chrystallographic inhomogenity significantly affects the rate and that it is virtually impossible to use the mineral as a model for the kinetics of hydrometallurgical processing of copper ores.Dissolution experiments, stability diagrams,and X-ray powder diffraction studies are undertaken and studied in this research and results are given.It is found that a complete solid solution series exists in Nature with most tungstenian wulfenites and molybdenum stolzites containing a range o
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6

Kamali, Mahtab. "Recovery of copper from low-grade ores by Aspergillus niger." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ64055.pdf.

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7

Latorre, J. J. "Exploration for stratabound copper, lead and zinc deposits in the Damara-Katanga orogen, central-southern Africa." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1005558.

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The Damara-Katanga orogen in central-southern Africa represents an area of 1.73xl0⁶ sq. km. The region is considered one of the wealthiest metallogenic provinces in the world. Successful exploration for stratabound base-metal deposits has taken place at this particular area since the introduction of more organised methodology in the early 1920s. The genesis, location and distribution of the ore deposits are related to their tectonic settings. Geodynamic evolution of the orogen, which initially formed part of a complex Pan-African rift system, comprises the following stages rifting; downwarping
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8

Jiang, Mofen. "The Chemical and kinetic mechanism for leaching of chrysocolla by sulfuric acid." Thesis, The University of Arizona, 1992. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1992_610_sip1_w.pdf&type=application/pdf.

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9

Légaré, Nathalie. "Les minéralisations de zinc-cuivre du secteur Frotet-Troilus, Chibougamau, Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2002. http://theses.uqac.ca.

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10

Barriga, Vilca Abrahan. "Studies on the curing and leaching kinetics of mixed copper ores." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44500.

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Heap leaching is a metal extraction process from low grade ores where crushed ore is stacked on an impermeable pad and irrigated from the top with a solution of chemical reagents. An enriched solution containing the targeted metal is collected at the bottom. This technique involves complex chemical/electrochemical reactions and transport processes. Among the main features of this method of extraction include low capital and operative cost, modularity, and relatively high inventory of solutions. The need to optimize a heap operation has led to research studies in order to understand and interp
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11

Hangone, Gregory. "The role of collectors in the flotation of partially oxidised copper ores." Thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/6730.

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The effects of xanthates, dithiophosphates, dithiocarbamates and mixtures of these collectors on the froth flotation performance of partially oxidised and oxidised copper sulphide ores were investigated in this study. More specifically, the role of the functional groups of the collectors, their dosages and the effect of collector mixtures and their dosages were investigated. Batch flotation tests were used to assess the performance in terms of mass-water recovery, sulphur grade-recovery, copper grade-recovery and acid soluble copper grade-recovery relationships and the Klimpel rate constant fo
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12

Zheng, Jialong. "An electrochemical study of the copper-gold-cyanide system with reference to the processing of copper-gold ores." Thesis, Zheng, Jialong (2000) An electrochemical study of the copper-gold-cyanide system with reference to the processing of copper-gold ores. PhD thesis, Murdoch University, 2000. https://researchrepository.murdoch.edu.au/id/eprint/52721/.

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Gold and copper often occur together in ores, an occurrence which creates processing difficulties since cyanide leach solutions are not selective for gold. Copper contamination can result in serious problems throughout the conventional carbon-inpulp process, often making the operation uneconomic. This thesis describes electrochemical studies of two ways of dealing with copper contamination. One concerns the selective electrodeposition of gold from coppercontaining cyanide solutions; the second concerns the possibility of selectively leaching gold from copper-containing ores using an aerate
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13

Chen, Wei, and 陈伟. "Origin and tectonic environment of the Lala Fe-Cu-(Mo, REE) deposit, Sichuan province, SW China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/197093.

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The Hekou Group in the Kangdian region, SW Yangtze Block is a metavolcanic-metasedimentary succession hosting the giant Lala Fe-Cu-(Mo, REE) deposit. Mafic volcanic rocks of the Hekou Group and nearby gabbroic intrusions have identical zircon U-Pb ages of ~1700 Ma. The sedimentary and mafic rocks are suggested to have formed in an intra-continental rift, similar to those of the North Australian Craton. Such a similarity suggests that the Yangtze Block was likely linked with the North Australian Craton in the Columbia supercontinent during late Paleoproterozoic. Overlying the Hekou Group is
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14

Giovenazzo, Danielle. "Géologie et caractéristiques géochimiques des minéralisations Ni-Cu-EGP de la région de Delta, ceinture de Cape-Smith, Nouveau-Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1991. http://theses.uqac.ca.

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15

Zhao, Xinfu. "Paleoproterozoic crustal evolution and Fe-Cu metallogeny of the western Yangtze Block, SW China." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B43572261.

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16

Magnan, Martin. "La zone 87 du gisement d'or et de cuivre du lac Troilus : pétrographie et géochimie /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1993. http://theses.uqac.ca.

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17

Tanda, Bennson Chemuta. "Glycine as a lixiviant for the leaching of low grade copper-gold ores." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/56525.

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The continuous depletion of high grade gold ores has shifted research focus towards the processing of low grade, complex ores containing impurities such as copper which is detrimental to the traditional cyanidation process. Alkaline glycine solution selectively leached copper and gold over impurity elements such as Fe, Ca, Mg and Si from copper – gold ores. Copper was recovered from solution by solvent extraction and gold could be recovered by carbon adsorption while glycine is recycled.
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18

Mach, Craig J. "Tectonic controls, timing and geochemistry of supergene enrichment of the Tyrone porphyry copper deposit, Grant County, New Mexico /." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3342621.

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Thesis (Ph. D.)--University of Nevada, Reno, 2008.<br>"December, 2008." Accompanying CD-ROM contains appendices C and D. Appendix C: AutoCAD files with drill hole log; Appendix D: excel spreadsheet with copper mass balance calculations. Includes bibliographical references (leaves 206-215). Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2009]. 1 microfilm reel ; 35 mm. Online version available on the World Wide Web.
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19

Rusk, Brian Geoffrey. "Cathodoluminescent quartz textures and fluid inclusions in veins of the porphyry copper-molybdenum deposit in Butte, Montana : constraints on physical and chemical evolution of the hydrothermal system /." view abstract or download file of text, 2003. http://wwwlib.umi.com/cr/uoregon/fullcit?p3080595.

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Thesis (Ph. D.)--University of Oregon, 2003.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 211-235). Also available for download via the World Wide Web; free to University of Oregon users.
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20

Crane, Martin John. "Geochemical studies of selected base metal minerals from supergene zone /." View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030721.132607/index.html.

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Thesis (PhD) -- University of Western Sdyney, 2001.<br>"A thesis presented in accordance with the regulations governing the award of the degree of Doctor of Philosophy, University of Western Sydney" "November 2001" Bibliography: leaves 249 - 254.
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21

Diaz, Acevedo Nelson Simon. "Exotic deposits derived from porphyry copper systems in Chile." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1011149.

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The exotic orebodies related to cal-alkaline porphyry copper deposits. are sub-horizontal lenticular bodies of secondary copper minerals that impregnate Tertiary gravels and bedrock of different ages. They lie immediately downslope of the porphyry copper deposits, that is to say. they are related to the propylitic halo of the main deposits, and are considered to have originated with the deposition of copper minerals from solutions that overflowed during the secondary enrichment process. Supergene alteration took place between the late Oligocene and Miocene, by which time both orehodies (exotic
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22

Sapiie, Benyamin. "Strike-slip faulting, breccia formation and porphyry Cu-Au mineralization in the Gunung Bijih (Ertsberg) mining district, Irian Jaya, Indonesia /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Thesis (Ph. D.)--University of Texas at Austin, 1998.<br>Vita. Four folded plates in pocket. Includes bibliographical references (leaves 285-303). Available also in a digital version from Dissertation Abstracts.
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23

Korkalo, T. (Tuomo). "Gold and copper deposits in Central Lapland, Northern Finland, with special reference to their exploration and exploitation." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:951428108X.

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Abstract At least 30 gold deposits verified by means of one or more notable diamond drill hole results have been discovered in Central Lapland in the last 20 years, and these can be divided spatially into groups, between which the metal composition varies. The deposits contain varying amounts of sulphides and sulpharsenides as well as gold. Pyrite is the most common sulphide mineral in the gold deposits associated with volcanic rocks, and usually pyrrhotite in those associated with sedimentary rocks. The principal sulphide minerals in those connected with banded iron formations are pyrite and
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24

Shah, Kush. "The use of surfactants to aid and improve the leaching of low grade copper ores." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61802.

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Copper heap leach operations often suffer from reduced efficiency due to long leach times and variable recoveries. Surfactants have been considered as an option in increasing the leachability of ores. Improvements in overall copper extraction have been noted with their use, though testing has only been conducted on a limited scale. The molecular function of surfactants in heap leaching has not been extensively studied and is not well explored. The work in this thesis was aimed at better understanding and characterizing the function of the surfactants. Work was performed with surfactants develo
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25

Ackerman, Benjamin R. "Regolith geochemical exploration in the Girilambone District of New South Wales." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20051027.095334/index.html.

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26

Ure, Alexander David. "Understanding the influence of mineralogy and microwave energy input on the microwave treatment of copper ores." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/41513/.

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Ore comminution is an energy intensive and inefficient process in which new innovative technologies could potentially deliver great benefits. Over the past two decades, the high power microwave treatment of ores has shown the potential of being a novel step-changing comminution technology. The ability of microwaves to rapidly and selectively heat certain minerals within an ore, and generate and propagate intergranular fractures at grain boundaries, has been shown to be an innovative process for reducing ore strength and enhancing mineral liberation. A review of the literature has identified th
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27

Thériault, Robert. "Influence de l'assimilation de roches sédimentaires encaissantes sur l'origine des gisements de Cu-Ni-EGP de l'intrusion de Partridge River, complexe de Duluth, Minnesota /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1999. http://theses.uqac.ca.

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28

Scott, Grant. "Microwave pretreatment of a low grade copper ore to enhance milling performance and liberation." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/123.

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29

Amos, Idzi Ambo. "Chemical investigation of leaching and electrochemical behaviour of sensor-based pre-concentrated copper ores with alkaline lixiviant." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/20849.

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While the production of copper metal from primary ores is still increasing, the gradual depletion of high-grade ores implies that the recovery of the metal from low-grade ores is presenting a challenge. A major problem associated with processing of low-grade copper ores can be their high calcite content and concentration of other metals such as Fe, Mn, Co, As, Pb, and Ni. These other metals make the processing of such ores expensive due to the high cost of the leaching chemicals. Therefore, in this study a novel, integrated copper processing method is developed to enhance the economic extracti
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30

Cartwright, John Alexander. "Study of the leaching of polymetallic sulphide ores using ion selective membranes." Thesis, Queensland University of Technology, 1998.

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31

Rickard, Jason H. "Petrological and mineralogical study of Cu-Ni-PGE-bearing ores within the 100 orebody, Copper Cliff North mine, Sudbury, Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0012/MQ52404.pdf.

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32

Rickard, Jason H. Carleton University Dissertation Earth Sciences. "Petrological and mineralogical study of Cu-Ni-PGE-bearing ores within the 100 orebody, Copper Cliff North mine, Sudbury, Ontario." Ottawa, 2000.

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33

Tremblay, Christian. "Les éléments du groupe du Platine dans le dyke de Méquillon ceinture de Cape-Smith, Nouveau-Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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34

Greentree, Matthew Richard. "Tectonostratigraphic analysis of the Proterozoic Kangdian iron oxide - copper province, South-West China." University of Western Australia. Tectonics Special Research Centre, 2007. http://theses.library.uwa.edu.au/adt-WU2009.0054.

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The Cenozoic Ailaoshan – Red River shear zone marks the present day western margin of the South China Block. Along this margin are well preserved late Paleoproterozoic to early Neoproterozoic sedimentary and volcanic successions. This work examines the ages and tectonic environments for the formation of the successions, as well as significance of the regional tectono-magmatic events on the formation of widespread iron oxide-copper deposits. The oldest succession is the Paleoproterozoic Dahongshan Group. A new SHRIMP UPb age of 1675 ± 8 Ma for a tuffaceous schist unit confirms its Paleoproteroz
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35

Rojas, Ricardo Vicente 1951. "ORE-WASTE SELECTION UTILIZING GEOSTATISTICS (ARIZONA)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/291255.

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36

Gebert, James 1962. "The metallogeny of Cu-Ni and Zn-Cu-Pb deposits of the Frederickson Lake area, central Labrador Trough /." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63942.

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37

Zhao, Xinfu, and 赵新福. "Paleoproterozoic crustal evolution and Fe-Cu metallogeny of the western Yangtze Block, SW China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B43572261.

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38

Mhangara, Paidamwoyo. "Testing the ability of ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) to map hydrothermal alteration zones : a case study of the Haib Porphyry Copper-Molybdenum Deposit, Namibia." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50462.

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Thesis (MSc)--Stellenbosch University, 2005.<br>ENGLISH ABSTRACT: The availability of multispectral data from the satellite-borne ASTER (Advanced Space borne Thermal Emission Reflection Radiometer) sensor with 14 spectral bands, launched on 18 December 1999, ushers in a new dimension in large-scale mineral exploration. The ASTER bands are strategically positioned to map distinctive absorptive features for mapping alteration mineralogy, which has increased the potential to map hydrothermal alteration zones as compared to the conventional Landsat TM satellite and aerial photographs. This r
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39

Barra-Pantoja, Luis Fernando. "A Re-Os Study of Sulfides from the Bagdad Porphyry Cu-Mo Deposit, Northern Arizona, USA." Thesis, The University of Arizona, 2001. http://hdl.handle.net/10150/249252.

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Use of Re-Os systematics in sulfides from the Bagdad porphyry Cu-Mo deposit provide information on the timing of mineralization and the source of the ore -forming elements. Analyzed samples of pyrite, chalcopyrite and molybdenite mainly from the quartz monzonite and porphyritic quartz monzonite units are characterized by a moderate to strong potassic alteration (secondary biotite and K- feldspar). Rhenium concentrations in molybdenite are between 330 and 730 ppm. Two molybdenite samples from the quartz monzonite and porphyritic quartz monzonite provide a Re-Os isotope age of 71.7 ± 0.3 Ma. A t
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40

Escanilla, Artigas Nicolau. "Recursos minerales de cobre y su explotación prehistórica en el sudeste peninsular. El valle del Guadalentín (Murcia)." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/399293.

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En este trabajo se presenta el estudio de la minería y metalurgia del III milenio cal ANE en el valle del Guadalentín (Murcia). Es el milenio que separa las primeras manifestaciones metalúrgicas de la consolidación de El Argar como estado. El estudio parte de dos ejes diferenciados: Los recursos naturales y los principales poblados con evidencias de reducción de minerales. Se ha realizado una prospección extensiva de los depósitos minerales de cobre de todo el valle del Guadalentín cubriendo un área de 110 kilómetros en dirección SW-NE y 50 Km en dirección N-S. Durante estas prospecciones se
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41

Jacobs, Tamzon Talisa. "Process mineralogical characterisation of the Kansanshi copper ore, NW Zambia." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20490.

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Kansanshi mine is the largest copper producer in Africa. The deposit is mineralogically and texturally complex due to supergene enrichment resulting in the presence of a variety of primary and secondary copper minerals. This necessitates the processing of ore through three separate circuits: sulphide flotation, mixed flotation and oxide leach, followed by solvent extraction and electro-winning. This study revisits the process mineralogy of the ore using modern mineralogy tools, which for such a large and complex deposit cannot but deliver significant value. Specific focus is given to copper mi
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42

Parisot, Jean-Claude. "L'altération latéritique de protores cuprifères au Brésil." Poitiers, 1989. http://www.theses.fr/1989POIT2267.

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L'alteration supergene de trois indices de cuivre du bresil, localises entre 5**(o) et 24**(o) de latitude sud est etudiee. On determine les differentes phases d'alteration (smectitique et lateritique) correspondant a une grande mobilite geochimique. La plus grande partie du cuivre est lisciviee et le cuivre restant est associe a la goethite. Une application de cette etude a la prospection geochimique et a la mineralurgie est proposee
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43

Thorette, Jacques. "Contribution à l'étude de l'hydrothermalisme océanique : exemple du district minéralisé de York-Harbour (massif ophiolitique de Blow-Me-Down, Bay-of-Islands, Terre-Neuve)." Brest, 1986. http://www.theses.fr/1986BRES2002.

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Les mineralisations a cu-fe-zn de york-harbour sont encaissees dans l'unite volcanique situee au sommet de l'ophiolite cambrienne de blow-me-down. Celle-ci s'est formee a l'axe d'une dorsale oceanique a proximite d'une faille transformante. L'organisation en synclinal du secteur mineralise resulte du rejet des failles synvolcaniques en direction nord 135 et nord 45
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44

Calvert, M. "Computer modelling of comminution and classification plant." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375346.

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45

Kalichini, Monica Shamvuse. "A study of the flotation characteristics of a complex copper ore." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/16196.

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Kansanshi copper mine is situated in the north western province of Zambia. Weathering has given rise to a vertically zoned profile comprising leached, refractory, oxide, mixed and hypogene sulphide mineralisation. As a result of the mineral variations, the processing plant treats three distinct ore types; oxide, sulphide and mixed. The objective of this study was to investigate the floatability of a complex Kansanshi mixed copper ore comprising sulphide and oxide minerals with a view to achieving an optimal flotation performance in the treatment of the Kansanshi ore body. This required an in-d
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46

Del, Rio Salas Rafael Eduardo. "METALLOGENESIS FOR THE BOLÉO AND CANANEA COPPER MINING DISTRICTS: A CONTRIBUTION TO THE UNDERSTANDING OF COPPER ORE DEPOSITS IN NORTHWESTERN MÉXICO." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145742.

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Northwestern Mexico is characterized by different metallogenic provinces that are included along the Basin and Range, the Sierra Madre Occidental, and the Baja California geological provinces. With the purpose of contribute to the current understanding of the mineralizing processes, the present study focused on two important copper metallogenic provinces: the Cananea Porphyry District in Sonora, and the Sediment-hosted Stratiform Copper- and Mn-deposits in Baja California Sur. The U-Pb zircon ages from the mineralizing porphyries from Cananea district suggest a continued magmatic activity peri
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Lai, Yueh (Yves). "Thiosulfate leaching of natural Acanthite ore in copper-ammonia-ammonium sulfate medium." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61358.

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Silver is commonly present in acanthite in nature. Reagents like cyanide are used to extract silver from acanthite ores. However, cyanide can potentially damage human health and environment. The use of cyanide is tightly regulated, thus forcing the industry to seek for alternatives. Thiosulfate is currently the most promising alternative. The leaching chemistry of silver with thiosulfate is complex and maybe supplemented with additives such as ammonia, copper and even ethylenediaminetetraacetic acid. The efficiency of silver leaching is improved with the use of these additives. The use of
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48

Tatiya, Ratan Raj. "Ore estimation and selection of underground mining methods for some copper deposits." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46738.

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de, Sousa Eudes Alves 1959. "Impact of geology on ore grade estimation of a porphyry copper deposit." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277264.

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Accurate ore estimation processes are of crucial importance in the mining scenario. Over the last 20 years, one practical approach to improve ore grade estimation has encouraged the need to incorporate the geology of the ore deposit being estimated in the estimation process. The objective of this study is to investigate the impact of the geology on the kriging estimation of the ore grade of a portion of a porphyry copper deposit. Preliminary data analysis demonstrates the need to perform a subsequent variogram modeling and kriging estimation of the ore grade by rock type separation. Global and
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50

Creach, Monique. "Accumulation supergène de cuivre en milieu latéritique : étude pétrologique, cristallochimique et géochimique de l'altération du skarn de Santa Blandina (Itapeva, Bresil)." Poitiers, 1988. http://www.theses.fr/1988POIT2344.

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On etudie l'indice cuprifere de santa blandina (bresil) provenant de l'alteration d'un skarn porteur d'une mineralisation sulfuree a chalcopyrite et bornite. Les produits argilomorphes provoquent l'epigenie des mineraux du skarn et des solutions percolantes provoquent l'evolution mineralogique de ces produits. Les analyses mineralogiques et cristallochimiques determinent la nature exacte de ces phases argilomorphes et montrent la difficulte de l'incorporation du cuivre dans un reseau regulier d'argile
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