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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Mineral chemistry of Merensky Reef chromitite layers in the Marikana District

Wansbury, Nicole Tracy January 2016 (has links)
A Dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfillment of the requirement for the degree of Master of Science. 2016. / An important feature of the Merensky Cyclic Unit in the Bushveld Complex is the association of platinum group metals with narrow chromitite layers. The appearance and removal of chromitite layers in this unit has been used to define facies types. This study explores the hypothesis that individual chromitite layers within the Merensky Cyclic Unit at Marikana have distinguishing major element concentrations or ratios which could assist in tracing the continuity of the chromitite layers between facies types which is characterized by single or multiple layers. The examination of field relationships of the chromitite layers at the transition between facies types will be useful to improve understanding of lithological continuity. This study has two approaches; the first being the examination of underground exposures and petrographic analysis, and secondly by chemical analysis of chromite grains within the chromitite layers. No chromite mineral compositional trends or similarities were observed for grains in chromitite layers hosted by the same silicate mineral. The mineral chemistry evidence suggests that post cumulus processes are considered to have changed the primary chromite compositions and that reequilibration has occurred due to reaction with trapped intercumulus liquid. Little to no reaction with the host silicates of plagioclase and pyroxene is envisaged. The slow cooling of the Bushveld Complex has allowed intercumulus liquid a greater opportunity to equilibrate with the early minerals, destroying the early magmatic history by reaction and recrystallization. The cumulate deposition model envisaged to have formed the Merensky Cyclic unit at Marikana is by the emplacement of several pulses of superheated magma, supported by the occurrence of several chromitite layers within the sequence. / LG2017
2

Platinum share prices and the Marikana tragedy: an event study

Sunga, Tapuwa Terence January 2014 (has links)
An event study is an economic tool of analysis that has begun to gain popularity in recent empirical literature. It is a technique that gives a researcher the opportunity to map out the reaction of a firm's stock to an event, usually making use of daily or monthly data. However, up to this point, event study methodology has generally been applied to more traditional phenomena capable of affecting equity value, such as dividend and macroeconomic policy announcements, and there have only been a few exceptions to this. This study looks at what impact the tragic shootings at Lonmin mine in Marikana on August 16th 2012 had on the share prices of platinum mining firms based in South Africa using event study methodology. It makes use of the technique to investigate how the share prices responded to the tragedy over a number of trading days, including the day of the shootings. To be best of our knowledge, no attempt has been made to analyse the impact on share prices using events of this nature. For the investigation, daily returns data was used for each firm. The abnormal returns and cumulative abnormal returns to each were then calculated and compared with their respective expected returns in order to determine whether investors in the shares of that particular firm reacted positively, negatively or not at all. The evidence found suggests that tragedies of this nature are capable of influencing share prices in the same manner as more traditional economic phenomena. Overall, only one firm was found to have been negatively affected by the shootings in a persistent manner, while the shares of the other firms examined reacted in a manner that was positive overall, but varied according to individual firm characteristics such as size. These finding conformed to our a priori expectations. In addition, the results also confirm the benefits of applying event study methodology to a wide variety of phenomena that fall outside the boundaries usually associated with business.
3

Marikana youth: (re)telling stories of ourselves and our place

Moleba, Eliot Mmantidi January 2016 (has links)
This is a research report submitted in partial fulfillment of the requirements for the degree of Masters in Diversity Studies, in the Faculty of Humanities, University of the Witwatersrand, Johannesburg. / Prior to and immediately following 1994, South African youth literature has largely focused on atypical groups, especially young people’s participation in political protest and violence (Marks 2001; Ntsebeza 1993; Seekings 1993; Straker 1992; Van Kessel 2000). The challenge for new research is to grapple more broadly with the question of how young people construct ordinary lives and identities amid the changing and transforming socio-cultural, economic and political landscape. As such, this study aimed to focus on the ordinary, quotidian narratives of youth in an extraordinary place of Marikana, where the massacre of striking mineworkers took place in 2012. Face-to-face, individual interviews were conducted with 8 participants (aged between 19 and 31 years) living in Marikana, including people who were born in or had migrated to Marikana. Both structural and thematic analyses were used to analyse the transcribed texts. The structural analysis was used to examine how poverty plays a role in the form of stories told. The thematic analysis focused on the content of the narratives, drawing linkages across participants’ stories to understand how they make meaning of events and experiences in their lives. The themes identified were organised as follows: Marikana (nostalgia about the place of Marikana, and belonging to the place of Marikana), childhood in Marikana and elsewhere (growing up in Marikana, and growing up elsewhere), families and their structure (single-parent headed and transnational families, (grand)mothers as pillars of family, and (inter)generational absence/presence of fathers), education (lack of funds for schooling), and possibilities for the future (dreams and futures deferred, and fantasies of escape). The findings indicate that the trauma and violence of the Marikana Massacre was remarkably marginal in their narratives. Instead, participants stressed poverty as a systemic problem that is far more pervasive in how they (re)produce(d) their stories. This core finding reveals poverty as a perpetual structural violence, a repeated state of trauma that is inflicted on their lives and reflected in their stories. Further findings show that many biological fathers are absent in the lives of their children, mostly due to migration or death. Consequently, sons follow in their fathers’ footsteps, leaving their new families behind (some becoming transnational parents). This produces a prevalent intergenerational absence of fathers in Marikana. As a result, mothers and grandmothers are the main breadwinners and emotional pillars of the family. / MT2017
4

The miners, the just wage and the mining company : perpectives of an Ubuntu reponse to the Marikana killings

Bayat, Julieka 02 1900 (has links)
Text in English / This research focuses upon the killing on 16 August 2012, by the South African Police Service, of miners working in Marikana, in the North West Province, in their struggle for a just wage. This experience highlighted the ethical question of the relationship between the employee and the employer. This research investigates this question by reference to the evolution of the doctrine of the “just wage” and the “just price” in Western moral philosophy. The investigation shows that this Western doctrine is a significant basis for an ethical evaluation of the relationship between employee and the employer. However, the doctrine does require expansion by taking the woman as an indispensable factor in labour relations. Also, it requires deepening by engaging in dialogue with other philosophies of the world, in this particular case, the philosophy of Ubuntu. The dialogue with Ubuntu is justified by the fact that the majority of the miners, the actual diggers of the mineral wealth, are born into and nurtured through the philosophy of Ubuntu, even if some may have reservations about it. The dialogue reveals a specific philosophical issue, namely, a clash of the epistemological and moral paradigms. The Ubuntu epistemological-ethical maxim of feta kgomo o tshware motho (if and when one must choose between the continual accumulation of wealth and the preservation of human life then one ought to opt for the latter) is fundamentally at odds with capitalism, an economic system that elevates wealth and money to the status of a deity. A resolution of this conflict is an ethical imperative. / Philosophy, Practical and Systematic Theology / D. Litt. et Phil. (Philosophy)
5

Marikana : taking a subaltern sphere of politics seriously

Naicker, Camalita January 2014 (has links)
This thesis aims to open up the realm of what counts as political in the context of the Marikana strikes and subsequent massacre. It does primarily by taking into account the social, political and cultural context of Mpondo workers on the mines. Many narrow Marxist and liberal frameworks have circumscribed the conception of the ‘modern’ and the ‘political’ so much so that political organisation which falls outside of this conceptualisation is often regarded as ‘backward’ or ‘archaic’. It will provide an examination of the history, culture and custom of men, who have, for almost a hundred years migrated back and forth between South African mines and Mpondoland. This not only reveals differing modes of organising and engaging in political action, but also that the praxis of democracy takes many forms, some of which are different and opposed to what counts as democratic in Western liberal democracy. By considering what I argue, following some of the insights from the Subaltern Studies collective in India, to be a subaltern sphere of politics and history, it is possible to better understand the way workers organised and acted. The thesis also argues that most labour and nationalist historiography has been silent on the political contributions of women because of how Marxist/liberal analysis frames struggles through disciplined notions of work and resistance. Rather than objectifying workers as representatives of a homogenous and universal class of people devoid of context, the thesis has linked ‘the worker’ to the community from which s/he comes and community specific struggles, which are supported and sustained, often, by the parallel struggles of women in the community.

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