Made available in DSpace on 2016-03-15T19:32:48Z (GMT). No. of bitstreams: 1 Luciana Orozco de Gouveia.pdf: 1798459 bytes, checksum: a904ad1d5c4396a53379f94d9ad04ac8 (MD5) Previous issue date: 2014-02-19 / The number of mergers and acquisitions transactions has grown increasingly, overcoming barriers of the country of the companies origins. This is due to the increased competition, forcing companies who wish to prosper, to seek inorganic growth through acquisitions. The objective of this research was to develop a methodology for prospecting in the customer base of the commercial bank, maximizing the efficiency of the investment bank in the search of potential mergers and acquisitions transactions. The developed model in this research can be used by M&A (Mergers and Acquisitions) analysts on investment banks, since it will be possible to perform a screening in the customer base of commercial bank already using existing information held by the bank to find counterparties in transactions of M&A. It was developed a qualitative exploratory study based on historical of mergers and acquisitions transactions in the healthcare industry , it was analyzed the reasons which provided mergers and acquisitions transactions, deals value and also the acquisitions made by public companies in the healthcare industry. After that it was made a model to find counterparts in the customer base of a commercial bank, to seek potential targets or buyers. This model was applied in a real case, showing satisfactory outcome. / O número de transações em fusões de aquisições vem aumentando e cada vez mais ultrapassando as barreiras do país de origem das companhias. Isso ocorre devido à concorrência mais acirrada que obriga as empresas, que desejam prosperar, a buscar crescimento inorgânico através de aquisições. O objetivo desta pesquisa foi elaborar um modelo de prospecção na base de clientes do banco comercial, maximizando a eficiência do banco de investimentos na busca de transações na área de fusões e aquisições. O modelo desenvolvido nesta pesquisa pode ser utilizado por analistas de F&A (Fusões e Aquisições) de banco de investimentos, uma vez que será possível realizar uma triagem na base de clientes do banco comercial, já utilizando as informações existentes em poder do banco para buscar contrapartes nas transações de F&A. Foi realizada uma pesquisa qualitativa exploratória baseada em transações históricas de fusões e aquisições no setor de saúde; foram estudados os motivos que originaram as transações de F&A, perfil das empresas, valores dos deals e ainda as aquisições realizadas no setor por empresas de capital aberto. Com o estudo realizado foi elaborado um modelo para buscar contrapartes na base de clientes de um banco comercial, tanto para buscar potenciais alvos como compradores. Modelo este que foi aplicado em um caso real, demonstrando resultado satisfatório.

Orientador: Celso Kazuyuki Morooka / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica e Instituto de Geociencias / Made available in DSpace on 2018-08-04T17:58:55Z (GMT). No. of bitstreams: 1 ChampiFarfan_David_M.pdf: 3228003 bytes, checksum: 8b3ed290e87307aa0cc1afcdd9c2ecf3 (MD5) Previous issue date: 2005 / Resumo: Na atualidade as descobertas de óleo a grandes profundidades no mar têm levado ao desenvolvimento de campos localizados numa profundidade aproximada de 3000m, sendo então o sistema de Riser Híbrido Auto-Sustentável uma alternativa atraente. O presente trabalho apresenta os modelos matemáticos que descrevem o comportamento estático e dinâmico de um riser vertical com bóia de sub-superfície nas direções in-line, que é a direção da onda e correnteza no mar, e a direção transversal, perpendicular à direção in-line. Apresentam-se também simulações numéricas em diferentes condições de onda e correnteza e o seu efeito combinado, assim como o estudo paramétrico para as principais variáveis que influenciam no comportamento dinâmico e estático / Abstract: Nowadays, the oil discoveries at big depths in the sea have taken to the development of fields located in an approach depth of 3000m, being the Self Standing Hybrid Riser an attractive alternative. The present work presents the mathematical models that describe the static and dynamic behavior of a Vertical riser with a subsurface buoy in the directions inline, that it is the direction of the wave and currents in the sea, and the transversal, that is perpendicular to the in-line direction. Numerical simulations in different conditions of wave and currents are also presented and its combined effect is studied, as well as the parametric study for the main variable that influences its dynamic and static behavior / Mestrado / Explotação / Mestre em Ciências e Engenharia de Petróleo

A review of Archean granite-greenstone terranes, orogenic gold deposits, the Slave Province and modern exploration tools, techniques and methods was conducted to identify prospective areas in the Yellowknife domain for hosting orogenic gold deposits and illustrate the best exploration methods for delineating this deposit type. This study identifies Archean granite-greenstone terranes as economically important hosts to quartz-carbonate vein-hosted orogenic gold deposits. These deposits occur at convergent plate margins, but can also be related to local extensional tectonics within a convergent setting. Heat generated from tectonic processes can trigger hydrothermal fluid movement along first-order faults and shear zones. Precipitation of gold-bearing quartz-carbonate veins from the hydrothermal fluids occurs in second- and third-order faults and shear zones related to the first-order structures. This study also identifies the Archean Slave Province in northern Canada as a well-endowed craton with numerous orogenic gold deposits, diamondiferous kimberlites, VMS deposits and several other mineralization styles. In particular, three greenstone belts (Yellowknife, Cameron River and Beaulieu River) associated with likely first-order structures are comprised of prospective rocks for hosting orogenic gold and VMS mineralization. The Yellowknife greenstone belt hosts the past-producing and former world-class Con and Giant orogenic gold deposits, but has been little explored with modern exploration techniques. The Cameron River and Beaulieu River greenstone belts host numerous base and precious metal VMS and BIF-hosted orogenic gold prospects and deposits, indicating mineralization is present. There is considerable potential for significant discoveries to be made using modern exploration techniques in the greenstone belts; however, exploration in the region has been hindered over the past decade by ongoing political negotiations. Once the political negotiations are finalized, application of modern exploration methods and techniques in the prospective greenstone belts should be carried out. Regional scale methodologies should be applied to generate targets using predictive modelling, implicit 3D modelling, 3D geochemistry and exploration targeting so decisions defining a businesses strategy for ground acquisition of high priority targets are made using quantitative analysis. Once ground is acquired, field-based exploration for orogenic gold and VMS deposits should include geological mapping with a focus on structural geology, geochemical sampling and airborne magnetic, radiometric and EM geophysical surveys. Prior to reconnaissance drilling, integration of all data layers and interpretation within a common 3D earth model should be conducted. Following successful reconnaissance drilling, definition drilling along strike and down dip of intersected mineralization, combined with borehole geophysics, should be carried out to delineate the extent of mineralization.

The Kaponda Prospect represents a surface of 915.8 km² located at about 10 km south of the town of Lubumbashi and 33km NW of Kasumbalesa in the Democratic Republic of Congo (DRC). It lies within Neoproterozoic sedimentary rocks of the Katangan Supergroup in the Central African Copperbelt (CACB). In this province, copper mineralization occurs at different stratigraphic level with different associated alteration. Mineralization is of multistage origin from synsedimentary, diagenetic to post orogenic. Since the discovery of the CACB in the early 20th century, several exploration techniques have been used to delineate Cu deposits. A review and application of these methods including remote sensing, geological mapping, geochemical and geophysical surveys, and drilling, gives an insight of their effectiveness and limitation before analyzing their results from the Kaponda Prospect. The geology and structure of the Prospect is represented by a series of two NW trending disharmonic tight anticlines, locally domal, with cores occupied by either Roan Group or “Grand Conglomerat” Formation. These anticlines are separated by an open syncline made of Kundelungu rocks. Two mains direction of faults are recognized, the NW and NE trending structures. The latter direction are normal transfer faults which can serve as conduit for mineralization. They are related to the late orogenic extension of the Lufilian belt. However NE trending faults are believed to be associated to the climax of Lufilian folding or represents synsedimentary intergrowth faults. Exploration approach for sediment-hosted Cu within Kaponda Prospect, take into account the integration of all information derived from different techniques. Remote sensing is used as aid to geology. Landsat and Google earth images show lineaments that corresponds to lithostratigraphy boundary and domal anticline. Geological mapping identified reduced horizons which can potentially host mineralization, whereas analysis of structure measurements reveals the geometry of fold and direction of its axial plane and hinge. Statistical methods such as the main + 2 standard deviation, the frequency histogram and probability plot, together with experiential method are used to constrain and define Cu and Co thresholds values in soil samples. It appears that in this region, log-probability plot and histogram methods combined with spatial representation and the experience of the region, are the best practice to constrain and separate geochemical background from anomaly data. Ground and airborne magnetic, and radiometric images show specific signatures which map alteration and particularly lithostratigraphy such as “Roan” Group, “Grand Conglomerat” unit, “Nguba” cap carbonates and “Kundelungu” siliciclastic units. Analysis of faults interpreted from geophysical maps identified three major directions: E-W, NE-SW and NW-SE. The E-W faults are also interpreted as normal transfer faults such NE-SW structures, consistent with regional geological map. Although pole-dipole array of induced polarization (IP) survey was directly targeting disseminated Cu sulphide, its results suffer in responding to graphitic rocks and barren pyrite. Only relative small chargeable bodies need to be tested in drilling follow-up. A total of 15 targets have been generated through re-interpretation and integration of both geological mapping and remote sensing, geochemical and geophysical data, as well as existing drilling. Specific recommendations of follow-up works are advised for each type of target.

This study is informed by the rising demand for power needs in South Africa and aims at understanding the geophysical and geochemical characteristics of the energy minerals in the Springbok Flats Basin and relating them to the prevailing geological and structural setting for improved exploration targeting. The Springbok Flats Basin is part of the Karoo sediments and host to uranium, coal and coal bed methane (CBM) resources. The lithology sections in the basin indicate presence of basaltic lavas at the top, underlain by mudrocks, siltstones, sandstones, conglomerates and diamictite, with interbedded coal beds occasionally. The coals are uraniferous and shale bounded and of lower Beaufort age at 250 Ma. The regional radiometric data identifies the regional extent of the Springbok Flats Basin as a basin with low total count values. This information is useful in exploration as it gives an idea of the limits of the area where to focus application for prospecting licenses. The reduced to pole of the total magnetic field, residuals and first vertical derivative maps clearly show the high magnetic susceptibility nature of the surrounding Bushveld rocks as compared to the low Karoo sediment susceptibility within the basin. There are distinct ring shaped picks within the basin possibly due to known Karoo dolerite sills in particular to the central south western part of the grid. The regional geochemical mapping program is a cost-effective way of providing an overview of the relative abundance levels, regional trends and anomalous patterns in the underlying lithological units. Background values of elements in soils over different lithological units and the identification of anomalous values relative to these elements can easily be identified. The geochemical results show an excellent correlation between soil chemistry and underlying geological formations. A few distinct gravity highs are clearly shown within the basin. Assuming the effect of the Letaba basalt to the gravity readings is uniform across the basin; these distinct anomalies could be due to Karoo dolerite sills as they coincide with areas of distinct high magnetic signature. A conceptual model was generated assuming that the Karoo sediments’ layering is uniform across the gravity profile but changes in the residual are due to an increased thickness of the sill supported by the gentle changes on the surface topography. Satellite imagery has got its challenges especially in areas of vegetation but it does provide a very useful tool in exploration. A number of spectral analysis techniques and band rations can be used to differentiate the areas underlain by the Letaba basalts, the Karoo sandstones/shale and Bushveld granites for mapping purposes. The priority focus will be on the shallower Karoo sediments because of the potential for cheaper mining. Exploration targeting needs to be guided by observed geochemical and geophysical characteristics in order to prioritize areas taking into account the presence of Karoo intrusives such as the dolerite sills that tend to devolatize the coal hence affecting the quality/rank. Structures and gravity signatures are very important in delineating areas with thick sediments that have a potential for CBM. The same understanding in targeting goes a long way in planning drill holes, resource modelling and pre-feasibility stages for mine planning. A high resolution airborne geophysical survey is recommended over the basin to better resolve structures. Geophysical borehole logging is recommended to be part of the exploration drilling programs in the Springbok Flats Basin in order to define the in-situ geophysical characteristics. Geophysical logging is useful in particular for the uranium reserves that cannot be delineated from the surface due to deep intersection.

Thesis (MScConsEcol(Conservation Ecology and Entomology)--University of Stellenbosch, 2006. / Anglo American Corporation’s Namakwa Sands heavy minerals mining and beneficiation operation has been strip-mining a heavy mineral deposit, rich in the commercially valuable minerals ilmenite, rutile and zircon, since September 1994. The mine is located in the vicinity of Brand-se-Baai on the west coast of South Africa, approximately 385 km north of Cape Town. Strip-mining causes total destruction of natural ecosystems through the removal of vegetation and soil in the area where mining is being undertaken. Namakwa Sands has been rehabilitating mined out areas as the mining front moves forward. Due to the difficulty of rehabilitating mined out areas as a result of harsh environmental factors, Namakwa Sands has initiated various research projects to gain an understanding of the baseline conditions and ecosystem function in order to increase plant cover and biodiversity on post-mined areas. This on-going research and the development of rehabilitation and mining techniques have resulted in the implementation of four rehabilitation techniques varying in investment of topsoil replacement, seeding and plant translocation. This study assesses the success and effectiveness of these techniques in terms of various vegetation and soil parameters. In addition, those parameters that are considered useful for monitoring are identified. This study indicated that topsoil replacement and plant translocation facilitate the return of similarity, species richness, species diversity and vegetation cover to post-mined areas. The rehabilitation site that had the greatest amount of biological input (topsoil replacement and plant translocation) appeared to be the most successful technique in facilitating vegetation recovery similar to reference sites. In comparison, the site that had the least amount of biological input performed the worst and requires adaptive management, e.g. reseeding and / or plant translocation. Namakwa Sands should continue to replace topsoil in all future rehabilitation efforts and, when possible (e.g. after sufficient winter rain), continue to translocate species in multi-species clumps. In terms of species selected for translocation, Othonna cylindrica, Ruschia versicolor and Lampranthus suavissimus should be considered for future large-scale translocation projects. Zygophyllum morgsana appears to be more difficult to re-establish under the current climatic conditions (below average rainfall). The long-term viability of rehabilitated Z. morgsana populations needs to be determined before considering this species for any future large-scale translocation purposes. No translocated Asparagus spp. individuals survived and should therefore not be considered for any further translocation purposes. The grass Ehrharta calycina, which is dominant in the site seeded, should continue to be considered for future seeding. Species and functional diversity appear to be the most limiting factors within all the rehabilitation sites and Namakwa Sands will not be able to meet their long-term objective of small-stock farming if diversity and the number of palatable species do not increase significantly. Adaptive management should seriously be considered in order to speed up this process. Alternatively, an appropriate grazing strategy, which is related to the Tetragonia fruticosa dominated vegetation within rehabilitation sites, would need to be determined and adopted.More time is needed to ameliorate the rehabilitated soil profiles to the same level as in reference sites, especially with regard to carbon, pH and sodium levels. In order to increase organic matter within rehabilitation areas, Namakwa Sands should consider creating clumps with cleared vegetation from the mining front. Since the long-term rehabilitation goal has not been achieved, Namakwa Sands will need to continue to monitor plant and soil changes until it has been achieved. The objectives of the current rehabilitation programme are limited and Namakwa Sands should develop additional objectives relating to the structure and function of the natural vegetation. This will give a better indication of whether rehabilitation sites are progressing towards the desired end point and if adaptive management is required. In addition, the current monitoring programme (vegetation survey) implemented at Namakwa Sands could be improved by increasing the vegetation parameters to be monitored. It is recommended that the following vegetation parameters be monitored as part of the long-term monitoring programme: species composition and similarity, species richness, species diversity, vegetation cover, species dominance, vertical structure and functional diversity of the vegetation (clumps and inter-clumps). It is also recommended that carbon, pH and sodium of soil profiles be monitored as part of the long-term monitoring programme. These parameters should not be seen as exhaustive as this study only considered various vegetation parameters and soil chemistry between rehabilitation and reference sites. The results of other studies on the fauna, mycorrhiza, insects, etc. should also be taken into consideration and the monitoring parameters expanded accordingly.

Memento Mori, Latin for “remember thy death,” implores us to be mindful that death is both inevitable and inescapable. What of the records created during the process of dying and about death? Based upon wide-ranging archival research into primary documents, this thesis explores the rich sources of both official, public records, and personal, private ones, relating to mortality on the small-town Canadian frontier before 1950. The community of Red Lake, Ontario, which was established on the frontier as the result of the Red Lake gold rush of 1926, is the subject of a case study. Rather than merely cataloguing sources, this thesis illustrates that by adapting aspects from such archival appraisal methodologies as macroappraisal and documentation strategy, one is able to make available to researchers a wider range of sources relevant to the themes of dying and death. Specifically, by employing a documentation strategy methodology to identify and illuminate the records of human activities surrounding the functions of dying and death, archivists can offer to researchers the opportunity to locate relevant records wherever they may physically be. Since this is an Archival Studies thesis, it does not provide an historical analysis of dying and death, but is an archival study of the types of records related to the theme of mortality on the Canadian frontier: how those records were created, their character, and their capture and preservation in a small community. This thesis is organized into three chapters and a conclusion. Chapter One explores some relevant trends in the secondary literature of three fields: archival appraisal and description, small town or local development on the frontier, and dying and death as human activities. Chapter Two sets the context in which the thesis analyzes mortality on the frontier by outlining the relevant history of the Red Lake District of Northwestern Ontario and its pioneers. The focus is especially on the gold-mining boom years from the mid-1920s until shortly after the Second World War. The heart of the thesis, Chapter Three, is a case study of the various records creators, human activities, and resultant records related to mortality. It is organized according to three phases or functional categories surrounding dying, death, and memorialization. The conclusion summarizes the usefulness of the case study, in light of the literature review in Chapter One. It also suggests areas of further research, including aspects not covered herein, of the records of dying and death on the Canadian frontier. The documentation strategy, adapted from the original methods employed by archivists Helen Samuels and Richard Cox, was found to work best when deployed as a research and descriptive tool for exploring and documenting the records of mortality, more so than its original purpose as an acquisition tool. The strategy has wide-ranging usefulness discovering and then describing a “virtual” documentation universe relating to record-generating human functions and activities. / February 2008

Memento Mori, Latin for “remember thy death,” implores us to be mindful that death is both inevitable and inescapable. What of the records created during the process of dying and about death? Based upon wide-ranging archival research into primary documents, this thesis explores the rich sources of both official, public records, and personal, private ones, relating to mortality on the small-town Canadian frontier before 1950. The community of Red Lake, Ontario, which was established on the frontier as the result of the Red Lake gold rush of 1926, is the subject of a case study. Rather than merely cataloguing sources, this thesis illustrates that by adapting aspects from such archival appraisal methodologies as macroappraisal and documentation strategy, one is able to make available to researchers a wider range of sources relevant to the themes of dying and death. Specifically, by employing a documentation strategy methodology to identify and illuminate the records of human activities surrounding the functions of dying and death, archivists can offer to researchers the opportunity to locate relevant records wherever they may physically be. Since this is an Archival Studies thesis, it does not provide an historical analysis of dying and death, but is an archival study of the types of records related to the theme of mortality on the Canadian frontier: how those records were created, their character, and their capture and preservation in a small community. This thesis is organized into three chapters and a conclusion. Chapter One explores some relevant trends in the secondary literature of three fields: archival appraisal and description, small town or local development on the frontier, and dying and death as human activities. Chapter Two sets the context in which the thesis analyzes mortality on the frontier by outlining the relevant history of the Red Lake District of Northwestern Ontario and its pioneers. The focus is especially on the gold-mining boom years from the mid-1920s until shortly after the Second World War. The heart of the thesis, Chapter Three, is a case study of the various records creators, human activities, and resultant records related to mortality. It is organized according to three phases or functional categories surrounding dying, death, and memorialization. The conclusion summarizes the usefulness of the case study, in light of the literature review in Chapter One. It also suggests areas of further research, including aspects not covered herein, of the records of dying and death on the Canadian frontier. The documentation strategy, adapted from the original methods employed by archivists Helen Samuels and Richard Cox, was found to work best when deployed as a research and descriptive tool for exploring and documenting the records of mortality, more so than its original purpose as an acquisition tool. The strategy has wide-ranging usefulness discovering and then describing a “virtual” documentation universe relating to record-generating human functions and activities.

Memento Mori, Latin for “remember thy death,” implores us to be mindful that death is both inevitable and inescapable. What of the records created during the process of dying and about death? Based upon wide-ranging archival research into primary documents, this thesis explores the rich sources of both official, public records, and personal, private ones, relating to mortality on the small-town Canadian frontier before 1950. The community of Red Lake, Ontario, which was established on the frontier as the result of the Red Lake gold rush of 1926, is the subject of a case study. Rather than merely cataloguing sources, this thesis illustrates that by adapting aspects from such archival appraisal methodologies as macroappraisal and documentation strategy, one is able to make available to researchers a wider range of sources relevant to the themes of dying and death. Specifically, by employing a documentation strategy methodology to identify and illuminate the records of human activities surrounding the functions of dying and death, archivists can offer to researchers the opportunity to locate relevant records wherever they may physically be. Since this is an Archival Studies thesis, it does not provide an historical analysis of dying and death, but is an archival study of the types of records related to the theme of mortality on the Canadian frontier: how those records were created, their character, and their capture and preservation in a small community. This thesis is organized into three chapters and a conclusion. Chapter One explores some relevant trends in the secondary literature of three fields: archival appraisal and description, small town or local development on the frontier, and dying and death as human activities. Chapter Two sets the context in which the thesis analyzes mortality on the frontier by outlining the relevant history of the Red Lake District of Northwestern Ontario and its pioneers. The focus is especially on the gold-mining boom years from the mid-1920s until shortly after the Second World War. The heart of the thesis, Chapter Three, is a case study of the various records creators, human activities, and resultant records related to mortality. It is organized according to three phases or functional categories surrounding dying, death, and memorialization. The conclusion summarizes the usefulness of the case study, in light of the literature review in Chapter One. It also suggests areas of further research, including aspects not covered herein, of the records of dying and death on the Canadian frontier. The documentation strategy, adapted from the original methods employed by archivists Helen Samuels and Richard Cox, was found to work best when deployed as a research and descriptive tool for exploring and documenting the records of mortality, more so than its original purpose as an acquisition tool. The strategy has wide-ranging usefulness discovering and then describing a “virtual” documentation universe relating to record-generating human functions and activities.

MESMEG / Department of Mining and Environmental Geology / This study entails geochemical and mineralogical characterization of gold tailings of Nestor Mine and Glynn’s Lydenberg Mine of the Sabie-Pilgrim’s Rest goldfields. A total of 35 samples were collected and were analysed for chemical composition (XRF and ICP-MS), mineralogical composition (XRD). In addition, acid-base accounting (ABA) techniques had been conducted to predict the potential for acid mine drainage. Seepage from Nestor tailings dump and water samples from the adjacent Sabie River were also collected and analysed by means of inductively coupled plasma mass spectrometry (ICP-MS) and immediate constituent (IC) -analytical techniques. The study revealed that Sabie-pilgrim’s rest goldfield is characterized by both acid generating and non-acid producing tailings, and this is attributed to variations in the mineralogy of source rocks. Gold occurred within the Black Reef Quartzite Formation in the Nestor Mine and within the Malmani Dolomite in the case of Glynn’s Lydenburg Mine. Mineralogy and bulk geochemical analyses performed in this study showed a clear variation in the chemistry of Nestor Mine and Glynn’s Lydenburg Mine tailings. Predominant oxides in Nestor mine tailings samples are SiO2 (ranging from 66.7-91.25 wt. %; followed by Fe2O3 and Al2O3 (in range of 0.82-15.63 wt. %; 3.21-12.50 wt. % respectively); TiO2 (0.18-10.18 wt. %) and CaO (0.005-3.2 wt. %). Also occurring in small amounts is CaO (0.005-3.2 wt. %), K2O (0.51-2.27 wt. %), MgO (0.005-1.46 wt. %), P2O5 (0.029-0.248), Cr2O3 (0.013-0.042 wt. %) and Na2O (0.005-0.05 wt. %). The samples also contain significant concentrations of As (137-1599 ppm), Cu (34-571 ppm), Cr (43-273 ppm), Pb (12-276 ppm), Ni (16-157 ppm), V (29-255 ppm), and Zn 7-485 ppm). In the Glynn’s Lydenburg Mine tailings SiO2 is also the most dominant oxide ranging between 47.95 and 65.89 w%; followed by Al2O3 (4.31 to 16.19 wt. %), Fe2O3 (8.48 to 11.70 wt %), CaO (2.18 to 7.10 wt. %), MgO (2.74 to 4.7 wt. %). Occurring in small amounts is K2O (1.12-1.70 wt. %), MnO (0.089-0.175 wt. %), P2O5 (0.058-0.144 wt. %) and Cr2O3 (0.015-0.027 wt. %). Arsenic (As), is also occurring in significant amounts (807-2502 ppm), followed by Cr (117-238 ppm), Cu (10-104 ppm), V (56-235 ppm), Ni (45-132 ppm), Pb (13-63 ppm) and Zn (90-240 ppm). Nestor Mine tailings associated with Black Reef Formation mineralization have net neutralizing potential (NPR) <2, hence more likely to generate acid; and their acid potential (AP) ranges 1.56 to 140.31 CaCO3/ton and neutralizing potential (NP) range from -57.75 to -0.3 CaCO3/ton. Glynn’s Lydenburg Mine tailings dump which is vi associated with dolomite mineralization, however, was not leaching acid. Based on acid-base accounting results, these tailings have more neutralizing potential (ranging between 57.6 and 207.88 CaCO3/ton) than acid potential (ranging between 7.5 and 72.1 CaCO3/ton); and their NPR>2, hence unlikely to produce acid. This is confirmed by paste pH which was in the ranges between 7.35 and 8.17. Tailings eroded from Nestor Mine tailings dump were also found to be characterized by high content of metals and oxides, namely, As, Cu, Ni, Pb, V, and Zn with SiO2, Fe2O3 and TiO2. The tailings were observed eroded into the Sabie River where AMD related precipitate (yellow boy) was also observed, indicating further oxidation downstream. Field observations, onsite analyses of water samples and laboratory results revealed that Nestor Mine tailings storage facility discharges acid mine drainage with considerable amounts of Al, As, Cu, Fe, Mn, Zn and SO4 and very low pH exceeding the limit as per South African water quality standards. High concentrations of these metals have toxicity potential on plants, animals and humans. Upon exposure to oxygen and water, tailings from Nestor Mine are more likely to generate acid mine drainage that can cause detrimental effect to the environment and the surrounding communities. Potential pollutants are Fe, Mn, Al, As, Cr, Cu, Ni and Pb. Tailings from Glynn’s Lydenberg showed no potential for acid mine drainage formation. / NRF