Academic literature on the topic 'Diamond mines and mining – Zimbabwe'
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Journal articles on the topic "Diamond mines and mining – Zimbabwe"
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Promise, Zvavahera, Chigora Farai, and Tandi Roselyn. "The Indigenisation Policy and Economic Emancipation in Zimbabwe: A Case Study of the Zimunya-Marange Communities." Business and Management Horizons 6, no. 2 (November 22, 2018): 12. http://dx.doi.org/10.5296/bmh.v6i2.13954.
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This study sought to evaluate the impact of the Indigenisation Policy on the socio-economic emancipation of rural communities in Zimbabwe. A case study approach was taken focusing on the Marange and Zimunya communities in Manicaland Province of Zimbabwe, where diamonds are being mined. Both qualitative and quantitative research methodologies were applied to get a balanced view from these two communities on their socio-economic improvement because of the mining of diamonds, which are a valuable natural resource found in these two communities. Purposive sampling was applied to come up with the sample of senior politicians and traditional leaders. Two Focus groups were formed in the two communities. The study established that the five diamond mining companies doing business in the two communities had failed to honour their pledges of contributing USD10 million each towards the development of the two communities. Only USD400 000 was contributed by two mining companies at the time of the study. Ninety five percent (95%) of the respondents reported that there were no projects that were being implemented to benefit the local communities. It was therefore, concluded that there was limited socio-economic empowerment of the Marange-Zimunya communities by the diamond mining companies. The study recommended the intervention by the Government in order for these mining companies to honour their pledges by coming up with empowerment projects and also by allowing the two communities to have shares in these companies so that they could be economically empowered.
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Hove, Mediel, Tinashe Nyamunda, and Patience Mukwambo. "Violent state operations at Chiadzwa (Zimbabwe) diamond fields 2006-2009." Journal of Aggression, Conflict and Peace Research 6, no. 1 (January 7, 2014): 56–75. http://dx.doi.org/10.1108/jacpr-11-2012-0014.
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Purpose – The purpose of this paper is to investigate the debilitating socio-economic impact caused by the diamonds at Chiadzwa area in Zimbabwe on the illegal mining community that emerged and inhabited the hills of Chiadzwa between 2006 and the beginning of 2009. The research was carried out for academic proposes, as an advocacy strategy to expose the abuses and violent state operations perpetrated by the security forces. In addition, it intends to equip policy makers and implementers about the heavy handedness of Zimbabwe's security sector during its operations in the area in an effort to enable policy implementers to defend the rights of the affected people at Chiadzwa. Design/methodology/approach – The methodology engaged was chiefly qualitative and the study was a product of primary sources (especially in-depth interviews) and secondary sources (text books, journal articles, newspapers and the internet). Purposive and snowballing sampling techniques were used to collect the data between 2007 and 2009. Collected data were analysed and compiled between 2009 and 2013. Some of the names used in this study for our respondents are pseudo and this was done to ensure anonymity and secure the providers of information against possible retribution. On the other hand real names were used in particular where violent state driven operations were discussed. Findings – Initially the government of Zimbabwe was reluctant to intervene in the illegal extraction of diamonds in search of political leverage. Later it responded with violent manipulative strategies and operations with detrimental consequences on the illegal miners. The brutal strategies employed by individuals and the state led to injury, illness and death of people amid a harsh socio-economic environment. Research limitations/implications – A number of respondents preferred to use pseudonyms because they feared that information collected could be used against them. Practical implications – The study is a good example of conflict between the state machinery and its citizens over a natural resource. It reveals excessive use of force by the state which appears to be the norm in other countries where diamonds are dubbed “blood diamonds”. Social implications – In the midst of the diamond-related violence a new and vibrant social identity emerged commonly referred to as magweja. The area experienced challenges especially with regards to the provision of health services and the traditional use of herbs was endangered by the destruction of vegetation. Originality/value – It reveals a milieu, state regulation enforcement and security agents, magombiro (armed robbers or murderers) all who discharged violence on magweja the foremost victims of the violent systems and practices. In addition, it encourages policy markers and implementers to devise non-violent strategies when dealing with illegal exploitation of natural resources.
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Spiegel, Samuel J. "Legacies of a nationwide crackdown in Zimbabwe:Operation Chikorokoza Chaperain gold mining communities." Journal of Modern African Studies 52, no. 4 (November 10, 2014): 541–70. http://dx.doi.org/10.1017/s0022278x14000469.
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ABSTRACTAlthough conflict in Zimbabwe's diamond mining sector has recently received much international scrutiny, very little research has examined conflict in Zimbabwe's gold mining sector. This article analyses how a nationwide crackdown calledOperation Chikorokoza Chapera(‘No More Illegal Mining’) affected – and ‘disciplined’ – livelihoods in profound ways in both licensed and unlicensed gold mining regions. Drawing on interviews conducted between 2006 and 2013 with artisanal miners in the Insiza, Umzingwani and Kadoma areas as well as miners who crossed the border to Mozambique, the study reveals how a highly politicised crackdown led to uneven consequences. The analysis highlights both structural and physical violence, with more than 25,000 miners and traders arrested between 2006 and 2009 and more than 9,000 still imprisoned in 2013. Situating the crackdown within evolving political and economic interests, the study contributes to an understanding of how simplified discourses on ‘eradicating illegal mining’ mislead and mask power dynamics, while policing activities transform patterns of resource control. The study also emphasises that conceptualisations of the crackdown's legacy should carefully consider the agency of artisanal miners' associations, which, in some cases, have been actively seeking to resist coercive policies and rebuild livelihoods in the aftermath ofOperation Chikorokoza Chapera.
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Werkman, Julia. "Diamond Mining in Denendeh: Colonial Natural Resource Extraction and Indigenous Peoples in Canada’s Northwest Territories." Political Science Undergraduate Review 3, no. 1 (February 15, 2018): 37–44. http://dx.doi.org/10.29173/psur47.
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Diamond mining is a rapidly developing industry, with an immensely large presence in Canada's Northwest Territories (NWT) with two currently functioning mines. Since the opening of the first mine in NWT in 1998, the Canadian federal government has viewed diamond production as 'essential' to both the territorial and national economies, frequently highlighting the benefits of diamond production. Entrenched in colonial language, the very existence of diamond mines in operation within NWT violate teachings, values, and the time honoured reciprocal relationships with the land held by Indigenous peoples across the territory. In problematizing this relationship, this paper employs the theories of Glen Coulthard's work For the Land: The Dene Nation's Struggle for Self- Determination, and examines the ways in which the operation of diamond mines exist as strongholds of settler-colonialism while simultaneously seeking to 'modernise' Canada's North. This is achieved through an exploration of Indigenous land relationships, the false beneficiary nature of diamond mine corporations, and finally the homeland vs. colonial frontier dichotomy.
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Muchadenyika, Davison. "Women struggles and large-scale diamond mining in Marange, Zimbabwe." Extractive Industries and Society 2, no. 4 (December 2015): 714–21. http://dx.doi.org/10.1016/j.exis.2015.08.003.
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Gukurume, Simbarashe, and Lloyd Nhodo. "Forced displacements in mining communities: politics in Chiadzwa diamond area, Zimbabwe." Journal of Contemporary African Studies 38, no. 1 (January 2, 2020): 39–54. http://dx.doi.org/10.1080/02589001.2020.1746749.
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Newbury, Colin. "Technology, Capital, and Consolidation: The Performance of De Beers Mining Company Limited, 1880–1889." Business History Review 61, no. 1 (1987): 1–42. http://dx.doi.org/10.2307/3115773.
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In this article, Dr. Newbury focuses on the technical and financial reasons for amalgamation at the Kimberley mines in South Africa, drawing on primary records to account for the rise of De Beers as the world's major diamond mining company in the 1880s. He finds that prior experience in local government and on the mining boards prepared company directors for competition in joint stock enterprise, while differences in production policies and performance influenced the pattern of mergers within and among the four Kimberley mines. De Beers's close relationship with diamond merchants and private banks in London, particularly N. M. Rothschild & Sons, was central to its position as a prime mover toward consolidation. Dr. Newbury views De Beers as a firm that relied for its success less on its renowned chairman, Cecil J. Rhodes, than on a combined managerial expertise that reflected the interests of both mining producers and merchant buyers.
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Manenji, Tawanda. "The Trajectory of Zimbabwean Marange Diamond Revenue Remittances from 2006 to 2013." Scholedge International Journal of Business Policy & Governance ISSN 2394-3351 4, no. 6 (November 29, 2017): 56. http://dx.doi.org/10.19085/journal.sijbpg040601.
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<p>This study attempts to analyze Marange diamond revenue remittances in Zimbabwe from 2006 to 2013. The case of Mbada Diamond Company was used. The information gathered would either validate or nullify the belief that diamond revenues have not been fully attained to date. The Public Choice Theory propounded by Buchanan will help in explaining why such results have been attained in diamond revenue remittance. This paper was compiled after reviewing some government publications, National Budgets, journal articles as well as employing questionnaires and unstructured interviews. The research found that diamond revenue remitting in Zimbabwe particularly Marange fields were still lagging behind the expectations since the start of mining in 2006. Of the expected billions of diamond revenues only about US$971 million to US$1.6 billion is believed to have trickled into the Consolidated Revenue Fund (CRF) since 2006. The Marange diamond revenue remittances have proved to be trailing their expectations since the first formal sale was conducted in 2010. This was due to a plethora of challenges which includes weak legislative frameworks, corruption, informal diamond trading, technological incompetence as well as the imposition of economic sanctions to the Zimbabwean economy. The study makes some recommendations as to how the diamond revenues could be fully attained and such remedies among others include internal capacity building, passing of a diamond bill, nationalization of mining companies, introduction of a local mineral beneficiation scheme, multi-collaboration of various ministries in diamond revenue collection and subsidizing the mining of diamond to increase productivity. Zimbabwe’s diamond revenues if managed properly, would reduce government external debt, promotes economic development and improves service delivery in the public sector.</p>
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Calvão, Filipe. "The Company Oracle: Corporate Security and Diviner-Detectives in Angola's Diamond Mines." Comparative Studies in Society and History 59, no. 3 (June 7, 2017): 574–99. http://dx.doi.org/10.1017/s0010417517000172.
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AbstractIn 1957, the security force of Angola's colonial diamond mining company recruited African diviners to help them solve a case of diamond theft in Lunda. This event reveals a peculiar convergence of divinatory practices with techniques of corporate surveillance in Lunda's political economy of security. In their overlapping features of secrecy and control, divination and corporate security can be understood as historically aligned evidentiary practices, or what I call “corporate divination.” By examining divinatory rituals in tandem with the “occult” apparatus of corporate surveillance, and the figure of a colonial sorcerer-detective renowned for his “divinatory” prowess, I ask how such seemingly opposed modes of knowledge production eroded or shored up colonial rule. The cultural significance of divination within the context of a mining company, I suggest, exposes the conditions under which a colonial corporation appropriates the social world in which it intervenes, and conversely, the cultural resources that potentially shape or undermine corporate life in a colonial context.
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Kumar, Kamlesh, and S. K. Sharma. "Recovery of Magnesium Oxide from Kimberlite Tailing of Panna Diamond Mines." Advanced Materials Research 1101 (April 2015): 173–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1101.173.
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Caustic Magnesia is also known as reactive magnesia. In the present study, process has been developed for recovery of caustic magnesia from kimberlite waste of Panna Mine. Panna Diamond Mining Project is the only mine in the country producing diamond. This is an open cast mine producing about 84000 carats diamonds per annum. About 100 tones of kimberlite have to be processed to get 10 carats (2 grams) of diamonds. Thus, about 0.9 million tons of kimberlite waste is being generated annually. Around 6-7 million tons of kimberlite waste is already available at Panna Mines, accumulated over the years waste during mining. Therefore, there is a need to look for development of bulk usage from the kimberlite. Technological option for Eco- friendly & Economically Efficient has to develop. In view of their wide application, and bulk usage, the caustic magnesia was identified to be developed from Kimberlite. Recovery of caustic magnesia from kimberlite tailing of Panna Diamond Mine is a novel chemical process, to prepare caustic magnesia from waste material. The process comprises i) Leaching, ii) filtration of leach liquor, iii) Precipitation of filtrate to get R2O3 and filtrate, iv) Precipitation of magnesium hydroxide, v) Washing and drying of magnesium hydroxide precipitate to remove sodium ions and surface moisture, vi) Calcinations of dried Magnesium hydroxide to get caustic magnesia which can be used in pharmaceutical industries, as animal feed, Mg metal etc.
Dissertations / Theses on the topic "Diamond mines and mining – Zimbabwe"
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Spiegel, Samuel Jason. "Understanding operation Chikorokoza Chapera : the political ecology of 'formalising' Zimbabwe's gold and diamond mining sectors, 2006-2012." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/283949.
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Makombe, Percy Fungayi. "Governance reforms and national benefits : problems and prospects in Marange diamond mining in Zimbabwe." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20980.
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Zimbabwe is among the top diamond-producing countries and is believed to hold a quarter of the world's diamond reserves. Yet it is still one of the poorest countries as the economy is slumped and growth has slackened, and it is expected to further weaken. This study tracks the history of diamond mining at Marange diamond fields, describing what has played out since the discovery of huge diamond deposits in 2006.The study considers potential entry points to try and effect reform in diamond mining in the country. It also explores the governance options and their experience, distinguishing between domestic and global mechanisms and exploring the prospects for each. The study interrogates the strength and ability of various stakeholders to affect reform casting light on the politics and power dynamics at play.
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Simango, Robert Zulu. "Gold exploration northeast of Ngundu Halt, northern marginal zone of the Limpopo Belt, Zimbabwe." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1005844.
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Gold exploration was conducted in northern margin, granulite-facies rocks of the Limpopo Belt. Methods used in the prospecting include drainage, soil and rock geochemistry, geophysical surveys, geological mapping, trenching and diamond drilling. These techniques successfully led to the discovery of two medium size, mesothermal gold deposits (Grid 2s and Grid 4). Objectives of this study were to (a) document the exploration methodology used; (b) describe the regional geology; (c) establish a mineral deposit model; (d) outline the methods and results of various exploration techniques; (e) outline follow-up procedures and evaluation of anomalies; and (f) discuss results of the exploration exercise and conclusions. The granulite-facies terrain comprises Charno-enderbites, mafic and felsic to intermediate metavolcanic rocks and meta-sediments. Renco Mine situated immediately east of the study area, was selected as the ore deposit model for the exploration program. Gold mineralization occurs in shear and thrust zones within an enderbite. The gold deposits are structurally controlled by a first-order, Sinistral transcrustal Mauch Shear Zone, which is parallel to a regional east-northeast penetrative foliation. The deposits are in dilation zones where the Mauch Shear (a) is intersected by a dextral east-west shear (Grid 2s), or (b) has a sinistral splay (Grid 4 and Renco). Close to these deposits, the Mauch Shear is in contact with a "greenstone belt", which is a possible source of crustal metamorphic ore fluids and gold. The Grid 2s deposit contains fine-grained, disseminated free gold, and small amounts of pyrrhotite, pyrite and chalcopyrite in quartz veins within third-order shears in K-feldspar granite. K-feldspar, sericitic, silicic, sulphidation and carbonate alteration characterizes the deposit, which has a proposed mantle-degassing model. The Grid 4 deposit is magmatic porphyry-type, with CuMo and Au in third- and fourth-order shears respectively. Mineralization comprises disseminated to semi-massive pyrrhotite, pyrite, chalcopyrite, sphalerite, bismuth, molybdenite and gold. Wall rock alteration includes biotitic, chloritic, silicic, sulphidation and carbonate. In Grid 2s, Grid 4 and Renco deposits, the alteration mineral assemblages are in three facies, which are granulite, amphibolte and greenschist. In the three deposits, the mineralization occurs with the amphibolite-facies, indicating post-peak, retrograde metamorphic conditions.Illustrations (maps) only available in print form at Cory Library
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Mabhudu, Mark. "A comparative analysis of leadership and management at Jwaneng Diamond Mine /." Link to the Internet, 2008. http://etd.sun.ac.za/jspui/handle/10019/1925.
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Rau, Grant. "A geological evaluation of marine diamond placer deposits on the central Namibian inner shelf : a case study of the Hottentot Bay area." Thesis, Rhodes University, 2004. http://hdl.handle.net/10962/d1007554.
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This study focusses on the marine diamond placers within Exclusive Prospecting Licence 1950 and Mining Licence 103a, located northwest of the north-facing Hottentot Bay which is 60 km north of Lüderitz, along the central Namibian coastline. The thesis follows the natural geological evolution of the marine placer deposit from primary source, through alluvial and/or glacial transportation, concentration along the coastline by wave, aeolian and alluvial/sheet-wash processes and finally marine diamond placer preservation. All of these processes are reviewed as they are important in understanding of the evolution marine placer deposits. The poly-cyclic role of coastal aeolian, alluvial, and marine processes, in marine placer enrichment is shown to be particularly important in considered target identification and prioritisation. A detailed bathymetric, sonographic and seismic interpretation, is an integral part of diamond placer exploration, and was used to examine and describe surficial and sub-bottom characteristics within the study area. Marine placers are formed along palaeo-strandlines during periods of marine transgression and regression and are therefore fundamental in marine placer exploration. A detailed bathymetry map, compiled for this study, of the area between Lüderitz Bay and Clara Hill, provides the foundation for a detailed terrace level investigation. Regionally, twelve well-developed stillstand levels are identified, nine of which fall into the study area. These interpretations are compared with global eustatic as well as terrace and resource/reserve levels in the Lüderitz area and are found to correlate well. Sediment dynamic studies involve the use of accredited application software for wave refraction modelling, to determine the wave angle and orbital wave velocity at the seabed. Bedload velocities, required to move diamonds of specific sizes, can be empirically determined and therefore areas of diamond entrainment and deposition can be modelled and target features delineated and prioritised. These detailed interpretations provide a sound platform for evaluating diamond placer process models in the study area. By integrating both previously published and newly formulated ideas, a revised, holistic model for the formation of marine diamond placer deposits in central Namibian is postulated. The proposed model is tested by comparing it to the lateral distribution of presently defined resource/reserve areas in the Lüderitz area and shows a close correlation with most of these enriched deposits. Based on this model, a matrix for the delineation and prioritisation of marine placer deposits is developed and the best target features within the study area are identified.KMBT_363
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Watungwa, Ostern. "An investigation into strategy implementation : the case of the Zimbabwe mining development corporation." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95971.
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Thesis (MPA)--Stellenbosch University, 2014.ENGLISH ABSTRACT: The aim of this research was to investigate the challenges to effective strategy implementation at the Zimbabwe Mining Development Corporation (ZMDC). Strategic planning is argued to have overshadowed the area of actual strategic implementation. Organisations put a lot of effort into drafting good plans, but do not put equal effort into their realisation. It was assumed that there is a big gap between strategic planning and implementation. This is what drove the researcher to go into the field and explore the situation at the ZMDC in greater depth in a bid to bridge the gap through research on the subject matter. Literature on strategy and strategy implementation was analysed critically. The research was guided by the post-positivism research philosophy. This research paradigm enabled the use of qualitative methods, which facilitated the interaction with respondents. The case study research design was adopted, as the research sought to discover the impediments to strategy implementation and the best way forward in turning the strategies on paper into action. The major findings were that there indeed were loopholes in strategy implementation at the ZMDC. The challenges to the strategy implementation process at the ZMDC were noted to be poor delegation, lack of training and development, poor ethical values, limited resources, low motivation of employees, poor communication and coordination, lack of control and poor teamwork. The organisation was noted to have deficient communication processes, which contributed to the challenges facing strategy implementation. The findings brought to light the fact that strategic planning starts with the executive management, hence the need for their commitment to owning the entire process of strategic planning and execution. The study revealed limited involvement of staff in the initial stages of developing strategy. In order to enhance the implementation of strategies, it was recommended that motivational leadership at the ZMDC had to be ensured. Leadership, ownership and drive are required to compete effectively and to deliver growth. Management should adopt the „Strategy into Action‟ planning approach, charting a course through performance factors, linking strategic thrusts to projects, as well as departmental and individual activity, with the ultimate goal being to enable the ZMDC to effectively translate strategic goals into results in a clear and inclusive process. To turn strategic desires into action that drives results, the ZMDC leaders need to develop strategic thrusts and broad-based action plans, putting the vision to light, and picturing to everyone what would be viewed as strategic success and what it takes to achieve and measure the desired outcomes.
AFRIKAANSE OPSOMMING: Die doel van hierdie navorsing was om ondersoek in te stel na die uitdagings vir doeltreffende strategie-implementering by die Zimbabwe Mining Development Corporation (ZMDC). Daar word aangevoer dat strategiese beplanning wesenlike strategiese implementering oorskadu. Organisasies werk hard aan die opstel van goeie planne, maar werk nie ewe hard aan die verwesenliking daarvan nie. Die aanname is gemaak dat daar ʼn groot gaping tussen strategiese beplanning en implementering is. Dit het die navorser aangemoedig om die situasie by ZMDC prakties en op diepgaande wyse te ondersoek ten einde hierdie gaping deur navorsing oor die onderwerp te oorbrug. Die literatuur oor strategie en strategie-implementering is krities ontleed. Die navorsing is gerig deur ʼn post-positivisme-navorsingsfilosofie. Hierdie navorsingsparadigma het die gebruik van kwalitatiewe metodes moontlik gemaak, wat interaksie met die respondente in die hand gewerk het. ʼn Gevallestudie-navorsingsontwerp is gebruik, aangesien die doel van die navorsing was om die struikelblokke tot strategie-implementering en die beste pad vorentoe om strategie op papier in aksie oor te skakel, te bepaal. Die vernaamste bevindings was dat daar wel skuiwergate in strategie-implementering by ZMDC is. Die uitdagings rakende die strategie-implementeringsproses by ZMDC is geïdentifiseer as swak delegering, gebrek aan opleiding en ontwikkeling, swak etiese waardes, beperkte hulpbronne, lae motivering van werknemers, swak kommunikasie en koördinering, gebrek aan beheer en swak spanwerk. Daar is gemerk dat die organisasie gebrekkige kommunikasieprosesse het, wat tot die uitdagings vir strategie-implementering bydra. Die bevindings het aan die lig gebring dat strategiese beplanning by die uitvoerende bestuur begin, en dus is hul toewyding tot eienaarskap van die algehele strategiese beplannings- en uitvoeringsproses noodsaaklik. Die studie het beperkte betrokkenheid van personeel by die aanvanklike fases van strategie-ontwikkeling getoon. Ten einde die implementering van strategieë te bevorder, is die aanbeveling om motiveringsleierskap by ZMDC te verseker. Leierskap, eienaarskap en dryfkrag is nodig om doeltreffend mee te ding en te groei. Die bestuur moet die beplanningsbenadering van „Strategie in Aksie‟ aanneem, wat die weg deur prestasiefaktore aantoon en strategiese dryfkragte aan projekte asook aan departementele en individuele aktiwiteit koppel. Die uiteindelike doelwit is om ZMDC in staat te stel om strategiese doelwitte doeltreffend in ʼn duidelike en insluitende proses in resultate om te skakel. Ten einde strategiese strewes in aksie wat resultate lewer om te skakel, moet ZMDC se leiers strategiese dryfkragte en breedgebaseerde aksieplanne ontwikkel, waardeur die visie duidelik gemaak word en almal duidelikheid het oor wat as strategiese sukses beskou word en wat dit verg om die gewenste uitkomste te bereik en te meet.
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Doohan, Kim Elizabeth. ""Making things come good" Aborigines and miners at Argyle /." Doctoral thesis, Australia : Macquarie University, 2007. http://hdl.handle.net/1959.14/145.
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Thesis (PhD) -- Macquarie University, Division of Environmental and Life Sciences, Department of Human Geography, 2007."November 2006".
Bibliography: p. 352-398.
Mode of access: World Wide Web.
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Henderson, John C. "The Crater of Diamonds: A History of the Pike County, Arkansas, Diamond Field, 1906-1972." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3088/.
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The first diamond mine in North America was discovered in 1906 when John W. Huddleston found two diamonds on his farm just south of Murfreesboro in Pike County, Arkansas. Experts soon confirmed that the diamond-bearing formation on which Huddleston made his discovery was the second largest of its kind and represented 25 percent of all known diamond-bearing areas in the world. Discovery of the field generated nearly a half century of speculative activity by men trying to demonstrate and exploit its commercial viability. The field, however, lacked the necessary richness for successful commercial ventures, and mining was eventually replaced in the early 1950s by tourist attractions that operated successfully until 1972. At that time the State of Arkansas purchased the field and converted it to a state park. Thus this work tell the rich and complicated story of America'a once and only diamond field, analyzes the reasons for the repeated failures of efforts to make it commercially viable, and explains how it eventually succeeded as a tourist venture.
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Du, Toit Jeremias Cornelius. "A decision support system to optimise the available resources at Kimberley Mines." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/50673.
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Thesis (MBA)--Stellenbosch University, 2007.ENGLISH ABSTRACT: Diamond mining started in Kimberley in the early 1870s following the discovery of the various diamond bearing kimberlite pipes. Initial open pit mining was replaced by underground mining as the pits went deeper and the last underground mining eventually ceased in 2005 as a result of economic reasons. The mining of these primary resources created a number of tailing resources (previously called dumps) that are scattered all over Kimberley. These resources still contain diamonds as a result of historical inefficient processing technologies. However, each of these resources have unique geological and metallurgical properties because of the differences in the original kimberlites and the different treatment technologies that were used when the tailing resources were deposited. The tailing resources are mined by a fleet of earthmoving equipment and delivered to one of Kimberley Mines‟ five treatment plants for diamond recovery. Each plant is different in terms of treatment capacity, technologies utilised and overall efficiencies. These differences, combined with the geo-metallurgical properties of each individual resource and the hauling distance from the resource to the plant, determine if the specific resource can be treated profitably through that plant. With this array of resources available, Kimberley Mines is in the fortunate position of having flexibility to maximise the Net Present Value (NPV) of the operation. Unfortunately this flexibility also increases the complexity of finding the optimal solution. Mine Planning is currently conducted with a spreadsheet based input – output model but this model is not able to match the resource properties with the plant parameters and this method results in a plan that may be neither practical nor optimal. The model is also very time-consuming and scenario analyses are therefore very limited. This report presents the development of a mixed integer linear programming model to assist with the development of a practical, optimal mine plan. The model is roughly based on a generic model that addresses facility location and processing plant problems as developed by Barbaro & Ramani (1986); however, the model presented in this report includes a more detailed mass balance within the plant and models how the metallurgical properties of the resources affect the mass balances and overall throughputs. The results of the project indicate that the current spreadsheet based Mine Plan is not practical since it violates two mass balance constraints within the Combined Treatment Plant. The newly developed system is used to generate a mining schedule that does not violate any constraints while still delivering the same net present value and overall throughput. The system also illustrates that the plant can improve the annual throughput by 18.2% by changing one screen size. The system also illustrates that only two of the five plants add value and supports management‟s recent decision that the production through the other plants should cease. In summary: The newly developed system generates an optimal, practical mine plan in less than a tenth of the time required for the old spreadsheet based model. The new system can also do various what-if scenarios which the previous model could not answer.
AFRIKAANSE OPSOMMING: Die ontginning van diamante in Kimberley het in die vroeë 1870s begin na die ontdekking van verskeie diamanthoudende kimberlietpype. Aanvanklike oopgroefmynbou is later vervang deur ondergrondse metodes soos die myne dieper geword het. Die laaste ondergrondse myne het in 2005 produksie gestaak as gevolg van ekonomiese redes. Die ontginning van hierdie primêre reserwes het gelei tot die ontstaan van verskeie uitskotreserwes (voorheen genoem afvalhope) verspreid oor Kimberley. Hierdie reserwes bevat steeds diamante as gevolg van die historiese oneffektiewe aanlegte. Die reserwes het elkeen egter verskillende geologiese en metallurgiese eienskappe as gevolg van die verskille in die oorspronklike kimberliete en die verskillende herwinningstegnologieë wat in gebruik was toe die uitskotreserwes gegenereer is. Die uitskotreserwes word gemyn deur ‟n vloot grondverskuiwingstoerusting en word afgelewer by een van Kimberley Myne se vyf aanlegte vir diamantherwinning. Elke aanleg is uniek in terme van kapasiteit, tegnologieë in gebruik en algehele effektiwiteit. Hierdie verskille, tesame met die geo-metallurgiese eienskappe van elke reserwe en die vervoerafstand van die reserwe na die aanleg bepaal of die spesifieke reserwe winsgewend deur daardie aanleg geprosesseer kan word. Bogenoemde verskeidenheid van hulpbronne gee aan Kimberley Myne die voordeel van buigsaamheid om die Netto Huidige Waarde (NHW) van die myn te maksimeer. Hierdie buigsaamheid vergroot egter die kompleksiteit om die optimale antwoord te vind. Beplanning word tans met ‟n sigblad gebasseerde invoer – uitvoer model gedoen, maar hierdie model is nie in staat om die reserwes se eienskappe by die aanlegte se parameters aan te pas nie. Hierdie metode genereer dus ‟n plan wat moontlik nie prakties of optimaal is nie. Die model is ook tydrowend en scenario analises is dus baie beperk. Hierdie verslag beskryf die ontwikkeling van ‟n gemengde heeltallige lineêre programmeringsmodel vir die ontwikkeling van ‟n praktiese, optimale produksieplan. Die model is losweg gegrond op ‟n generiese model van Barbaro & Ramani (1986) wat fasiliteit posisionering en aanlegprobleme aanspreek. Die model in hierdie verslag bevat egter ‟n meer gedetailleerde massabalans binne die aanleg en modelleer hoe die metallurgiese eienskappe van die reserwes die massabalanse en die algehele kapasiteite beïnvloed. Die resultate van die projek dui daarop dat die huidige sigblad produksieplan nie prakties is nie aangesien dit twee massabalansbeperkings in die Combined Treatment Plant oorskry. Die nuwe stelsel is gebruik om ‟n produksieskedule te genereer wat nie enige beperkings verbreek nie en wat terselfdertyd die aanvanklike netto huidige waarde en totale produksie ewenaar. Die stelsel wys ook dat die jaarlikse kapasiteit met 18.2% verhoog kan word deur een van die sif-groottes te verander. Die stelsel demonstreer ook dat slegs twee van die vyf aanlegte waarde toevoeg en ondersteun bestuur se onlangse besluit dat die produksie deur die ander aanlegte gestaak behoort te word. Ter samevatting: Die nuwe stelsel genereer ‟n optimale, praktiese produksieplan in minder as ‟n tiende van die tyd benodig vir die ou sigblad model. Die nuwe stelsel kan ook verskeie “Wat sal gebeur indien…” scenario‟s hanteer wat die vorige model nie kon beantwoord nie.
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Van, Zuydam Henk Johan. "The alluvial diamond industry a critical analysis of the capital cost allowances /." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-06152009-150607/.
Full textBooks on the topic "Diamond mines and mining – Zimbabwe"
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(Organization), Human Rights Watch. Diamonds in the rough: Human rights abuses in the Marange diamond fields of Zimbabwe. New York: Human Rights Watch, 2009.
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Dhliwayo, Mutuso. Towards the development of a diamond act in Zimbabwe: Analysis of the legal and policy framework on diamonds and Zimbabwe's compliance with the Kimberley Process Certification Scheme (KPCS) minimum requirements. Harare, Zimbabwe: Zimbabwe Environmental Law Association, 2012.
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Mavhinga, Dewa. Deliberate chaos: Ongoing human rights abuses in the Marange diamond fields in Zimbabwe. New York, NY: Human Rights Watch, 2010.
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Parent, Traci. Black Diamond Mines Regional Preserve. Charleston, SC: Arcadia Pub., 2009.
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Parent, Traci. Black Diamond Mines Regional Preserve. Charleston, SC: Arcadia Pub., 2009.
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Karen, Terhune, ed. Black Diamond Mines Regional Preserve. Charleston, SC: Arcadia Pub., 2009.
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Bartholomew, D. S. Gold deposits of Zimbabwe. Harare: Zimbabwe Geological Survey, 1990.
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Treasures of the Diamond Coast: A century of diamond mining in Namibia. Windhoek: Macmillan Education Namibia Publishers, 2009.
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Deve, Thomas Muchineripi. Mica mining in Zimbabwe, 1900 to 1960. [Harare]: University of Zimbabwe, History Dept., 1989.
Find full textBook chapters on the topic "Diamond mines and mining – Zimbabwe"
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Fowler, Jonathan A., E. Biscaye, and Shannin H. A. Metatawabin. "Diamond Mining and Sustainability at De Beers’ Canadian Mines." In Proceedings of 10th International Kimberlite Conference, 289–94. New Delhi: Springer India, 2013. http://dx.doi.org/10.1007/978-81-322-1173-0_19.
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Muqayi, Solomon, and Oripha Chimwara. "The Sustainability of Diamond Mining in Zimbabwe." In The Sustainability Ethic in the Management of the Physical, Infrastructural and Natural Resources of Zimbabwe, 423–50. Langaa RPCIG, 2019. http://dx.doi.org/10.2307/j.ctvmd84s6.23.
Full textConference papers on the topic "Diamond mines and mining – Zimbabwe"
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Jakubec, Jaroslav, Daniel Lagace, William Boggis, Lyndon Clark, and Philip Lewis. "Underground mining at Ekati and Diavik diamond mines." In Fourth International Symposium on Block and Sublevel Caving. Australian Centre for Geomechanics, Perth, 2018. http://dx.doi.org/10.36487/acg_rep/1815_03_jakubec.
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Karami, Amir, Sarah Greer, and Richard Beddoes. "Numerical Assessment of Step-Path Failures of Northwest Wall of A154 Pit, Diavik Diamond Mines." In 2007 International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering. Australian Centre for Geomechanics, Perth, 2007. http://dx.doi.org/10.36487/acg_repo/708_17.
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