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Dissertations / Theses on the topic 'Ore mineral'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Fletcher, Andrew. "Crushing mechanisms and mineral release." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237737.

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2

Gan, Princess Rochelle. "Flotation of Yxsjöberg historical tungsten ore tailings." Thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75844.

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Tailings dams, due to their sheer size and metal content, pose safety and environmental hazards. The Småltjarnen repository, which hosts material from the largest known tungsten mineralization in Sweden named the Yxsjöberg deposit, is estimated to contain 2.2 million tons of material from previous operations when recovery rates of scheelite, chalcopyrite, and fluorite were low. The repository is also observed to contain at least four of the listed critical raw materials by the European Commission in 2017, namely tungsten, fluorite, beryllium, and bismuth. The amenability of this tailings repos

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3

Van, Tonder Erika. "The effect of ore blends on the mineral processing of platinum ores." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10982.

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Includes abstract.<br>Includes bibliographical references (leaves 96-101).<br>This thesis investigates the effect of ore blends on milling and flotation performance. Anglo Platinum's Waterval UG2 concentrator in Rustenburg processes ore from various shafts.

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4

Ghanei, Javad. "Evaluation of the relation between ore texture and grindability." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77097.

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5

Crandall, Jake. "Potential mineral resources on Mars: Ore processes and mechanisms." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1677.

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Ore-forming processes are relatively well understood on Earth, but little is known about mineralization processes on Mars. By applying terrestrial analogs, using data collected from orbital and rover missions and evidence for hydrothermal activity from alteration assemblages, the types and locations of different ore-forming processes have been investigated with the aim of discovering concentrations of mineral resources on Mars. These resources are likely to be of critical importance for future manned missions to Mars, and insight gained towards mineralization on Mars may also advance our unde

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6

Gabell, Andrew R. "High-resolution remote sensing applied to mineral exploration in Australia /." Title page, and contents only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phg1123.pdf.

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7

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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8

Maree, Westhein Bethren. "Froth flotation of an Nkomati mineral ore using mixtures of thiol collectors." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2512.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.<br>Nickel, a valuable base metal, is the predominant product from the Nkomati mine in South Africa. High-grade nickel mineral ores (2%) from the Massive Sulphide Body have been depleted leaving those of low grade (0.3%). The beneficiation of this ore presents a challenge to the minerals processing industry. In response, batch froth flotation tests were used to explore the effects of mixtures of potassium amyl xanthate (PAX) and IPETC (Isopropyl ethyl thionocarbamate) on the grades and recoveries of nickel. In

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9

Foulkes, Michael Edward. "Plasma spectrochemical analysis of slurries." Thesis, University of Plymouth, 1989. http://hdl.handle.net/10026.1/1928.

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10

Latti, Anna Dewetia. "The textural effects of multiphase mineral systems in liberation measurement /." [St. Lucia, Qld.], 2006. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19407.pdf.

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11

Kapageridis, Ioannis K. "Application of artificial neural network systems to ore grade estimation from exploration data." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301663.

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12

Stalder, Marcel. "Petrology and mineral chemistry of sulphide ores and associated metalliferous rocks of the Gamsberg Zn-Pb deposit, South Africa : implications for ore genesis and mineral exploration." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16072.

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Thesis (PhD)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: The Gamsberg Zn-Pb deposit is a metamorphosed and multiply deformed sediment-hosted base metal deposit in the central Namaqua Province of South Africa. The deposit is hosted by the Bushmanland Group, a late Palaeoproterozoic (2000-1600 Ma) supracrustal succession of quartzite, metapelitic schist and interbedded metavolcanic rocks. Mineralisation occurs within the central part of the Gams Formation, a heterogeneous sequence of metamorphosed metalliferous sediments and fine-grained organic-rich shales. The ore horizon is s

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13

Gottheil, Jeremy. "Modelling Mineral Liberation of Ore Breakage to Improve the Overall Efficiency of Mining Operations." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42555.

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As the demand for a low-carbon and environmentally friendly future increases, so does the importance of mineral and metal commodities. The production of solar panels, wind turbines, energy storage systems and other green technologies require large quantities of minerals and rare earth metals. Natural Resources Canada noted that in 2019, Canada was a global leading producer in minerals required for green technology including graphite, nickel, cobalt, and others [1]. While mineral production continues to rise year over year, the ore grade, i.e., the concentration of a desired material, of mult

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14

Sundelin, Alexander. "Bergschakt 153 kopplad till enbergspänningsmodell i Kiirunavaara gruvan : Ore pass 153 connected to a rock tension model in the mine of Kiirunavaara." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66762.

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15

Alves, Paula Regina. "The carbonatite-hosted apatite deposit of Jacupiranga, SE Brazil: styles of mineralization, ore characterization and association with mineral processing." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/prayb4_09007dcc804f7bd9.pdf.

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Thesis (M.S.)--Missouri University of Science and Technology, 2008.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 9, 2008) Includes bibliographical references (p. 131-139).

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16

Parian, Mehdi. "Development of a geometallurgical framework for iron ores - A mineralogical approach to particle-based modeling." Doctoral thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62515.

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The demands for efficient utilization of ore bodies and proper risk management in the mining industry have resulted in a new cross-disciplinary subject called geometallurgy. Geometallurgy connects geological, mineral processing and subsequent downstream processing information together to provide a comprehensive model to be used in production planning and management. A geometallurgical program is an industrial application of geometallurgy. Various approaches that are employed in geometallurgical programs include the traditional way, which uses chemical elements, the proxy method, which applies

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Mwanga, Abdul-Rahaman. "Development of a geometallurgical testing framework for ore grinding and liberation properties." Doctoral thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59904.

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Efficient measurement methods for comminution properties are an important prerequisite for testing the variability of an ore deposit within the geometallurgical context. This involves the investigation of effects of mineralogy and mineral texture on the breakage of mineral particles. Breakage properties of mineral particles are crucial for the liberations of minerals and the energy required for that. For process optimization and control purposes, comminution indices are often used to map the variation of processing properties of an entire ore body (e.g. Bond work index). Within the geometallur

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18

Cruz, Victor Muniz Alves. "Metalogenia em terrenos de alto grau metamórfico: as mineralizações tungstaníferas da área de Monumento/Cacaria RJ." Universidade do Estado do Rio de Janeiro, 2015. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=8155.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Em trabalho de prospecção geoquímica regional por concentrado de bateia (PEREIRA e SANTOS, 1983) foi evidenciado na região de Cacaria, município de Piraí, ocorrências de scheelita. Com o objetivo de investigar a possível fonte litológica desta ocorrência, foram realizadas amostragens de sedimentos de corrente e concentrado de bateia além de investigações de campo para sua fonte. Elaborouse ainda um mapa geológico em escala de detalhe 1:25.000. As unidades estratigráficas base utilizadas no mapa foram definidas em trabalhos da emp

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19

John, Kangeze Biteme. "Ore forming potential of the Atchiza Suite and Sustainable management of mineral deposits in Mozambique : "Petrology, geochemistry and sustainable management of mineral deposits"." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for geologi og bergteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20380.

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Part 1- Abstract This research study presents detailed petrographic- and geochemical- analysis of 63 rock samples from the Atchiza Suite. The Suite is a layered mafic-ultramafic pluton located in the Tete Suite, of NW Mozambique. At present, the Atchiza comprises a group of three main types of rock that are classified based on their mineralogy, textures, geochemical composition. These are ultramafic cumulates (dunite and pyroxenites), mafic cumulates (medium-grained cumulate gabbro) and coarse-grained gabbro (non-cumulate gabbro). Compared to the rest of other rocks, coarse-grained gabbro show

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20

Gan, Yu. "Assessing the Impacts of Mineral and Hydrocarbon Resources Exploitation and Consumption." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1085.

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The exploitation of natural resources lays the foundation for the economic and social development, but also is the root cause of various environmental issues. The study aims to analyze the process of natural resource exploitation, to optimize the extraction and utilization processes, maximizing their economic and social values while reducing the accompanied negative environmental impacts. This dissertation focuses on the impacts of exploitation of mineral and hydrocarbon resources in emerging countries on global warming effect, economy and society. Chapter 2 of the dissertation analyzes the li

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Faber, Pieter Coenraad. "An analysis of the tax implications of ore stockpiling in the mining industry." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-02272009-164909/.

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22

Ryösä, Elin. "Mineral Reactions and Slag Formation During Reduction of Olivine Blast Furnace Pellets." Doctoral thesis, Uppsala universitet, Institutionen för geovetenskaper, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9389.

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The present work focuses on mineral reactions and slag formation of LKAB olivine iron ore pellets (MPBO) subjected to reducing conditions in the LKAB experimental blast furnace (EBF). The emphasis is on olivine reactions with surrounding iron oxides. Many factors influence the olivine behaviour. The study was performed by use of micro methods; optical microscopy, micro probe analysis, micro Raman and Mössbuer spectroscopy and thremodynamic modeling. During manufacturing, in oxidising atmosphere at high temperature (1350°C), olivine alterations occur through slag formation and rim reactions wit

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23

Isaksson, Adam. "Evaluation of Scale-up Model for Flotation with Kristineberg Ore." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70117.

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The objectives of this project were to survey the flotation circuit of the Boliden concentrator, mass balance collected data and evaluate a scale-up model for laboratory flotation results. The model assumes that half of the recovery to cleaner middlings in a standard laboratory test would report to the final concentrate if it were done in closed circuit, as is the case in a full-scale plant. It has been used by Boliden Mineral AB since 1982 but its accuracy had not been studied since 1986. The model can be categorised as of open circuit type with scale-up factors. The project was based on a co

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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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Swanepoel, Francois. "Estimation of particle size distributions in mineral process systems using acoustic techniques." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51746.

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Thesis (MEng)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: A desire to increase the efficiency of the comminution process in mineral process systems has led to the need of determining the size distribution of ore particles at various stages in the system. The objective of this research is to investigate the feasibility of the use of an acoustic sensor for measuring particle size distribution. The acoustic signal generated when the particles impact on a cantilever bar is analysed using digital signal processing techniques. As rocks fall onto a metal bar, the bar vibrates. The vibr

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Gungor, Kazim. "Production Of Heavy-media-quality Magnetite Concentrate From Kesikkopru Iron Ore Tailings." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611830/index.pdf.

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ABSTRACT PRODUCTION OF HEAVY-MEDIA-QUALITY MAGNETITE CONCENTRATE FROM KESiKK&Ouml<br>PR&Uuml<br>IRON ORE TAILINGS G&uuml<br>ng&ouml<br>r, Kazim M. Sc. Department of Mining Engineering Supervisor: Prof. Dr. M. &Uuml<br>mit Atalay May 2010, 91 pages The aim of this research was to investigate the possibility of the production of a magnetite concentrate which is suitable for preparation of heavy media from iron ore tailings of G&uuml<br>ncem Mining Company magnetic separation facility. During the study, three different tailings named as low grade, medium grade and high grade with 5.91 % Fe

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27

Belo, Fernandes Ivan. "Geometallurgical approach to understand how the variability in mineralogy at Zinkgruvan orebodies affects the need for copper activation in the bulk rougher-scavenger flotation." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65392.

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Zinkgruvan is a Pb-Zn-Ag deposit located in south-central Sweden, owned and operated by Lundin Mining. The ore is beneficiated by a collective-selective flotation circuit, recovering both galena and sphalerite in a bulk rougher-scavenger flotation stage and later on separating them into two final products. Opportunities for increase in zinc recovery in the bulk rougher scavenger flotation stage have been identified as the plant is relying on natural Pb-activation to process the ore. Process mineralogical tools were used to characterize four different orebodies from Zinkgruvan (Burkland, Borta

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Soyer, Nihat. "An Aproach On Dilution And Ore Recovery/ Loss Calculation In Mineral Reserve Estimations At The Cayeli Mine, Turkey." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607933/index.pdf.

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Dilution and ore recovery/loss have an important role in calculation of mineral reserves. Each percent increase in dilution and decrease in recovery negatively affects economic value of the reserve. These parameters are mainly controlled by the quality of the mine design and stoping practice. This study provides an approach developed for dilution and recovery/ore loss calculations. The contribution of mine design software (MineSight) and the recent survey technique called Cavity Monitoring System (CMS) were presented in this study. The purpose was to compare the new approach with the old sy

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Manono, Malibongwe Shadrach. "Investigating electrolyte-reagent-mineral interactions in response to water quality challenges in the flotation of a PGM ore." Doctoral thesis, Faculty of Engineering and the Built Environment, 2019. http://hdl.handle.net/11427/30414.

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Froth flotation is a physicochemical process that enables the separation of valuable minerals and unwanted gangue minerals contained in an ore. It utilises the differences in surface properties of the minerals to be separated. Among other factors affecting flotation, water is a major factor as it acts as a reagent and transport medium. Therefore, it stands to reason that the quality of the water used in the process matters. Current environmental restrictions on water usage which are aimed at addressing the global scarcity of water require that mining operations recycle and reuse water within t

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Koch, Pierre-Henri. "Particle generation for geometallurgical process modeling." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63270.

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A geometallurgical model is the combination of a spatial model representing an ore deposit and a process model representing the comminution and concentration steps in beneficiation. The process model itself usually consists of several unit models. Each of these unit models operates at a given level of detail in material characterization - from bulk chemical elements, elements by size, bulk minerals and minerals by size to the liberation level that introduces particles as the basic entity for simulation (Paper 1). In current state-of-the-art process simulation, few unit models are defined at th

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Nilsson, Erik A. A. "Degradation Mechanisms of Heat Resistant Steel at Elevated Temperatures : In an Iron Ore Pelletizing Industry." Doctoral thesis, Luleå tekniska universitet, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62162.

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This thesis focuses on the different degradation mechanisms of the stainless steel in a travelling grate in a Grate-Kiln iron ore pellet indurator. The travelling grate is a conveyor belt that transports green-body pellets to a rotary kiln while the pellets are being dried and pre-heated to a temperature of 900-1100 °C by recycled hot air. After unloading of the pellets to the rotary-kiln for further sintering, the travelling grate is cooled in room temperature while returning to the loading zone of the wet pellets. The steel was tested during thermal cycling in a test-rig, in order to simulat

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Erdem, Omer. "Uncertainty Assessment For The Evaluation Of Net Present Value Of A Mineral Deposit." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610207/index.pdf.

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The profitability of a mineral deposit can be concluded by the comparison of net present values (NPV) of all revenues and expenditures. In the estimation of NPV of a mineral deposit, many parameters are used. The parameters are uncertain. More accurate and reliable NPV estimation can be done with considering the related uncertainties. This study investigates the probability distributions of uncertain variables in estimation of NPV and evaluation of NPV using Monte Carlo simulation. @Risk 4.5.7 software package is used to apply Monte Carlo simulation method. At the end of the study, all possi

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Van, Huyssteen Darryn Ashley. "Mineralogical variation in the basal Upper Zone, Bushveld Igneous Complex, South Africa: implications for ore genesis and mineral extraction." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/5060.

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Udoudo, Ofonime. "Modelling the efficiency of an automated sensor-based sorter." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/118786.

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For future development of automated sensor-based sorting in the mining industry, an improvement in the separation efficiency of the equipment is desirable. This could be achieved through a better understanding of the identification and separation aspects of the automated sorter. For automated sorters that undertake separation through the use of compressed air jets, the problem of poor separation efficiency has been linked with co-deflection losses. Co-deflection losses occur as particles meant to pass on to the ‘accept’ bin are co-deflected with the particles (which are to be deflected) meant

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García, Juanatey María de los Ángeles. "Seismics, 2D and 3D Inversion of Magnetotellurics : Jigsaw pieces in understanding the Skellefte Ore District." Doctoral thesis, Uppsala universitet, Geofysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-178060.

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The Skellefte District (SD) is one of the richest metallogenic mining areas in Sweden. The main deposits consist of volcanic-hosted massive sulphides (VHMS) rich in zinc, copper, lead, gold and silver, that have been explored and mined for more than a century. Considering that technological advancements allow deeper mining, and that today new discoveries rarely occur, renewed efforts are now directed at locating targets at greater depths. Thus, current exploration strategies need to be adapted, and a better understanding of regional scale structures is necessary. To address these questions t

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Dehghannejad, Mahdieh. "Reflection seismic investigation in the Skellefte ore district : A basis for 3D/4D geological modeling." Doctoral thesis, Uppsala universitet, Geofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-221225.

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The Skellefte ore district in northern Sweden is a Palaeoproterozoic volcanic arc and one of the most important ones hosting volcanogenic massive sulfide (VMS) deposits, producing mainly base metals and orogenic gold deposits. Due to high metal prices and increased difficulties in finding shallow deposits, the exploration for and exploitation of mineral resources is quickly being moved to greater depths. For this reason, a better understanding of the geological structures in 3D down to a few kilometers depth is required as a tool for ore targeting. As exploration and mining go deeper, it becom

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Robison, Lori Carol 1955. "Geology and geochemistry of Proterozoic volcanic rocks bearing massive sulfide ore deposits, Bagdad, Arizona." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/558078.

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Sousa, Débora Nascimento. "Depressores alternativos na flotação catiônica reversa de minério de ferro." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6594.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2016-12-15T11:54:43Z No. of bitstreams: 2 Dissertação - Débora Nascimento Sousa - 2016.pdf: 4367047 bytes, checksum: 35c38302a78c568610631ef86cddb6c3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Jaqueline Silva (jtas29@gmail.com) on 2016-12-15T17:17:55Z (GMT) No. of bitstreams: 2 Dissertação - Débora Nascimento Sousa - 2016.pdf: 4367047 bytes, checksum: 35c38302a78c568610631ef86cddb6c3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made a

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Johansson, Simon. "Ore mineralogy and silver distribution at the Rävliden N volcanogenic massive sulphide deposit, Skellefte district, Sweden." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66264.

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The Rävliden North deposit (Rävliden N) is a volcanogenic massive sulphide (VMS) deposit in the western part of the Skellefte district, northern Sweden. The district is one of Sweden’s major metallogenic provinces with a significant amount of VMS deposits. The Rävliden N deposit, discovered in 2011, contains copper, zinc, lead, silver and subordinate gold and occurs close to the largest VMS deposit in the district, the Kristineberg deposit, which has been mined for more than 70 years. The purpose of this master thesis is to study the composition, mineralogy and paragenetic relationships in dif

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Dunbar, Alyssa C. "Using Surficial Geochemical Methods to Detect Anomalies of Ore Indicator Metals in a Peat Bog at McIlvenna Bay, Saskatchewan, Canada, as a Method for Blind VMS Deposit Exploration." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35833.

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Surficial geochemistry, particularly selective leach technology, has proven effective in revealing anomalous concentrations of ore indicator metals overlying zones of buried mineralization. This study focuses on the buried Zn-Cu-Au-Ag VMS deposit at McIlvenna Bay in the Flin Flon Greenstone Belt to determine whether the peat swamp at the surface contains any anomalies of ore indicator metals using simple surficial geochemical techniques. Three selective leaches were performed, ammonium acetate pH 5.0, hydroxylamine, and sodium pyrophosphate. The hydroxylamine leach, which selects for metals in

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Mapukule, Livhuwani Ernest. "Interpretation of regional geochemical data as an aid to exploration target generation in the North West Province South Africa." Thesis, University of Fort Hare, 2009. http://hdl.handle.net/10353/268.

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This study involves the application, interpretation and utilization of regional geochemical data for target generation in the North West Province, South Africa. A regional soil geochemical survey programme has been carried out by the Council of Geoscience South Africa since 1973. A number of 1:250 000 sheet areas have been completed, but there are no interpretative maps which could aid in mineral exploration and other purposes. In order to utilize the valuable and expensive data, the project was motivated through data acquisition and interpretation to generate exploration targets. The study ar

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Carvalho, Bruno César Lage de. "Aproveitamento de minérios de ferro de baixo teor: tendências, tecnologias utilizadas e influências no sequenciamento de lavra." Programa de Pós-Graduação em Engenharia Mineral. Departamento de Engenharia de Minas, Escola de Minas, Universidade Federal de Ouro Preto, 2012. http://www.repositorio.ufop.br/handle/123456789/2346.

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Submitted by Stéfany Moreira (stemellra@yahoo.com.br) on 2013-02-25T12:57:59Z No. of bitstreams: 1 DISSERTAÇÃO_AproveitamentoMinériosFerro.pdf: 4941141 bytes, checksum: 7fc54169ae9d05ca62dad2964a3d2b36 (MD5)<br>Approved for entry into archive by Neide Nativa (neide@sisbin.ufop.br) on 2013-02-25T14:03:40Z (GMT) No. of bitstreams: 1 DISSERTAÇÃO_AproveitamentoMinériosFerro.pdf: 4941141 bytes, checksum: 7fc54169ae9d05ca62dad2964a3d2b36 (MD5)<br>Made available in DSpace on 2013-02-25T14:03:40Z (GMT). No. of bitstreams: 1 DISSERTAÇÃO_AproveitamentoMinériosFerro.pdf: 4941141 bytes, checksum: 7fc5

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Groenewald, Jacobus Willem de Villiers. "Modelling and control of an autogenous mill using a state space methodology and neural networks." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52940.

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Thesis (MScEng)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Metallurgical processes are often high dimensional and non-linear making them difficult to understand, model and control. Whereas the human eye has extensively been used in discerning temporal patterns in historical process data from these processes, the systematic study of such data has only recently come to the forefront. This resulted predominantly from the inadequacy of previously used linear techniques and the computational power required when analysing the non-linear dynamics underlying these systems. Furtherm

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Trinca, Gabriel Henrique Costa e. Silva. "Projeto, montagem e posta-em-marcha de um loop de bombeamento de polpas minerais." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-26092017-143150/.

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O transporte de minérios através do bombeamento de polpa é relevante em escala mundial. No Brasil este modo de transporte é muito importante devido à enorme produção mineral e suas distâncias continentais. E, o bombeamento de polpa em planta é ainda mais importante pois é uma operação diária que afeta a todos os envolvidos. A motivação para este estudo foi providenciar para a Escola Politécnica uma estação de bombeamento capaz de levantar os parâmetros do escoamento necessários para o correto dimensionamento das linhas de polpa. Esta dissertação descreve a montagem de dois loops (3\'\' e 4\'\'

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Tregoning, Trevor Denzil. "The tectono-metallogenesis during the irumide and pan-African events in South West Africa/Namibia." Thesis, Rhodes University, 1987. http://hdl.handle.net/10962/d1004490.

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A large portion of South west Africa/Namibia is underlain by 2 great orogens. They are the Irumide (Sinclair/Rehoboth) and Damara Orogenies. The L-shaped Irumide Province forms part of a belt which extends over the subcontinent from Namaqualand to as far as Zambia. The volcano-sedimentary sequences of the Irumide are believed to have formed in intracratonic rifts and pull-apart basins during the period 1400 to 900 Ma. The evolution of the NW trending Sinclair Group proceeded by means of 3 major cycles each beginning with the emplacement of basic to intermediate magmas followed by felsic ones.

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Melo, Carlos Henrique Veloso de. "The challenges of multi-mineral assemblages in the reverse cationic flotation of iron ores." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0190.

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Le minerai de fer est la principale matière première utilisée dans la production d’acier etdoit en général être traité de manière à répondre aux spécifications requises par l’industrie de l’acier. L’industrie du minerai de fer fait désormais face à des gisements de plus en plus pauvres avec des assemblages de minéraux complexes. L’objective de cette étude est de valoriser un concentré magnétique de la mine de Peña Colorada (Mexique) via flottation cationique inverse. La mine de Peña Colorada est un gisement de type skarn ayant une teneur moyenne en fer de 36%. Il est composé de plusieurs phase

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Martins, Antonio Carlos da Costa. "Aplicação de autômatos celulares para modelagem de variáveis regionalizadas na mineração." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-26072013-115454/.

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O trabalho proposto considerou o desenvolvimento de uma abordagem por autômatos celulares para modelagem de recursos minerais. De uma maneira geral, os autômatos celulares permitem a modelagem de sistemas e fenômenos levando em conta parâmetros de forma, dimensão, geometria, regras de evolução, regras de vizinhança e estado inicial. Para a aplicação dos autômatos celulares, foi desenvolvida uma ferramenta de software com apoio do Núcleo de Desenvolvimento de Software, do Departamento de Engenharia de Departamento de Sistemas Eletrônicos da Escola Politécnica da Universidade de São Paulo. A fer

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Andrew, Anne. "Lead and strontium isotope study of five volcanic and intrusive rock suites and related mineral deposits, Vancouver Island, British Columbia." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26953.

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Lead isotope compositions have been obtained from five major volcanic and intrusive rock suites and several ore deposits on Vancouver Island. Lead, uranium and thorium concentrations and strontium isotope ratios have been obtained for a subset of these samples. The rock suites examined are the Paleozoic Sicker Group, Triassic Karmutsen Formation, Jurassic Island Intrusions and Bonanza Group volcanic rocks, and the Eocene Catface intrusions. Isotope geochemistry of the Sicker Group is consistent with the interpretation that it formed as an island arc. Relatively high 207pb/204pb ratios indicate

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Steele-MacInnis, Matthew. "Thermodynamics of geologic fluids." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/22026.

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Fluids play a vital role in essentially all geologic environments and processes, and are the principal media of heat and mass transfer in the Earth. The properties of geologic fluids can be diverse, as fluids occur at conditions ranging from ambient temperatures and pressures at Earth's surface, to extreme temperatures and pressures in Earth's deep interior. Regardless the wide ranges of conditions at which geologic fluids occur, fluid properties are described and governed by the same fundamental thermodynamic relationships. Thus, application of thermodynamic principles and methods allows us t

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Michel-Normand, Dominique. "Minéralisations aurifères et morphoscopie de l'or natif." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL159N.

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Des études géochimiques et morphoscopiques de l'or natif dans différents types de minéralisations aurifères, intégrées dans chaque cas au contexte gitologique, ont permis de déterminer les mécanismes de mise en place de l'or. Dans les veines de quartz aurifères des ceintures de roches vertes des mines de fazenda brasileiro et maria Lazara (brésil), il existe deux générations d'or natif, systématiquement associées à des sulfures, en présence de microfractures. La présence de grains d'or à aspect globulaire-réniforme et à développement bidimensionnel avec de nombreuses perimorphoses rhombiques,

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