Processed. / Bibliography: leaves 115-128. / xi, 128 leaves : ill., maps (some col.), 1 folded ; 30 cm. + 2 microfiche, 5 maps (folded), appendix and errata in pocket inside back cover. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Geology and Geophysics, University of Adelaide, 1989

A prospecção biológica (i.e. bioprospecção) é uma atividade, relativamente recente, que ocorre de forma desregulada na região austral, área de vigência do Sistema do Tratado da Antártida (STA). A normatização desta atividade no âmbito do STA é o principal tema em discussão na agenda do Regime Antártico. Este Regime Internacional, constituído pelo Tratado Antártico (de 1959), pela Convenção para Preservação das Focas Antárticas (de 1972), pela Convenção para Conservação dos Recursos Vivos Marinhos Antárticos (de 1980) e pelo Protocolo de Proteção Ambiental do Tratado da Antártida (de 1991), tem cumprido, ao longo de sua história, a missão de preservar a região austral e ordenar as atividades antárticas. Os Estados que o integram, enfrentam os novos desafios, criando instrumentos jurídicos para regulamentar atividades específicas. Todavia, eles encontram dificuldades de repetir este comportamento com relação à bioprospeccão. A razão disso é a complexidade desta atividade, associada à problemática da região austral, uma área sem soberanias reconhecidas. Existe imensa dificuldade de desenvolver uma legislação para contemplar diferentes interesses nacionais, disputas entre empresas e organizações ambientalistas, razões de ordem comercial e desacordos entre os interesses de pesquisa científica e do mercado, respeitando as normas e os princípios formalizados no Tratado Antártico. A bioprospecção na Antártida é um problema cuja solução, provavelmente, demandará longas e difíceis negociações. / Biological prospecting (i.e. bioprospecting) is a relatively recent activity that occurs unregulated in the austral region, area covered by the Antarctic Treaty System (ATS). The normatization of this activity is the main subject being discussed in the agenda of the Antarctic Regime. This International Regime, comprised by the Antarctic Treaty (1959), the Convention on the Conservation of Antarctic Seals (1972), the Convention on the Conservation of Antarctic Marine Living Resources (1980) and the Madrid Protocol to the Antarctic Treaty (1991), fulfills the mission to preserve the austral region and regulate international relations with respect to Antarctica. The nation-states, participants in this regime, have a tendency to face new challenges, by creating aditional agreements to regulate specific activities. Bioprospecting, however, has proven dificult to regulate. This is due to the complexity of the activity and the ambiguous territorial status of Antarctica. It is dificult to develop legislation that satifies interests of nation-states, private companies, environmental NGO’s, scientists and universities, while respecting norms and principles formalized in the Antarctic Treaty. Bioprospecting in Antarctica, therefore, is a problem that demands carefull and thoughtfull considerations, yet to be resolved.

The need to construct optimal drape surfaces arises in airborne geophysical surveys where it is necessary to fly a safe distance above the ground and within the performance limits of the aircraft used, but as close as possible to the surface. The problem is formulated as an LP with constraints at every point of a grid covering the area concerned, yielding a very large problem. The objective of the LP is to create as "good" a surface as possible. This formulation is new, as previous methods did not aim to minimise an objective function. If the desired surface has only slope limitations, the resulting drape surface must be constrained in the first derivative. Such a drape surface is readily constructed using the Lifting Algoritlun. It is shown that the Litling Algorithm is both exact and has great speed advantages. Some numerical results confinning exacmcss and speed are presented, as is the algorithm's analogy to a flow network method. An enhanced lifting method with a better order of complexity is also proposed and tested numerically. In most practical situations a drape surface is required which has both first and second derivatives constrained. If only a cut through such a surface is considered, the problem can be solved with relative ease by exploiting its nctwork~Jike structure. This method fonns the basis of one of the preferred heuristics developed later. It was not possible to generalise this method to a full two~dimensional drape surface. A commercially available LP package fares better in finding the optimal solution. Several heuristic methods were examined. first a general heuristic method based on a lifting approach was developed. This was followed by a method using repeated application of the method used for sections (the Alternating One-dimensional Dual Algorithm ["AODA"]). Three heuristics based on thimbles were also designed. Thimbles are caps whose first and second derivatives are acceptable and which are placed over local infeasibilities in the topography The work ends with a chapter comparing the efficiency of various heuristics and comparing the results obtained using a number of test datasets. It was fOLmd that heuristic methods provide acceptable drape surfaces and that the choice lies between speed and accuracy, with a previously designed smoothing method being the fastesl and the AODA the most accurate and quick enough. / Operations Research / D.Phil.

A prospecção biológica (i.e. bioprospecção) é uma atividade, relativamente recente, que ocorre de forma desregulada na região austral, área de vigência do Sistema do Tratado da Antártida (STA). A normatização desta atividade no âmbito do STA é o principal tema em discussão na agenda do Regime Antártico. Este Regime Internacional, constituído pelo Tratado Antártico (de 1959), pela Convenção para Preservação das Focas Antárticas (de 1972), pela Convenção para Conservação dos Recursos Vivos Marinhos Antárticos (de 1980) e pelo Protocolo de Proteção Ambiental do Tratado da Antártida (de 1991), tem cumprido, ao longo de sua história, a missão de preservar a região austral e ordenar as atividades antárticas. Os Estados que o integram, enfrentam os novos desafios, criando instrumentos jurídicos para regulamentar atividades específicas. Todavia, eles encontram dificuldades de repetir este comportamento com relação à bioprospeccão. A razão disso é a complexidade desta atividade, associada à problemática da região austral, uma área sem soberanias reconhecidas. Existe imensa dificuldade de desenvolver uma legislação para contemplar diferentes interesses nacionais, disputas entre empresas e organizações ambientalistas, razões de ordem comercial e desacordos entre os interesses de pesquisa científica e do mercado, respeitando as normas e os princípios formalizados no Tratado Antártico. A bioprospecção na Antártida é um problema cuja solução, provavelmente, demandará longas e difíceis negociações. / Biological prospecting (i.e. bioprospecting) is a relatively recent activity that occurs unregulated in the austral region, area covered by the Antarctic Treaty System (ATS). The normatization of this activity is the main subject being discussed in the agenda of the Antarctic Regime. This International Regime, comprised by the Antarctic Treaty (1959), the Convention on the Conservation of Antarctic Seals (1972), the Convention on the Conservation of Antarctic Marine Living Resources (1980) and the Madrid Protocol to the Antarctic Treaty (1991), fulfills the mission to preserve the austral region and regulate international relations with respect to Antarctica. The nation-states, participants in this regime, have a tendency to face new challenges, by creating aditional agreements to regulate specific activities. Bioprospecting, however, has proven dificult to regulate. This is due to the complexity of the activity and the ambiguous territorial status of Antarctica. It is dificult to develop legislation that satifies interests of nation-states, private companies, environmental NGO’s, scientists and universities, while respecting norms and principles formalized in the Antarctic Treaty. Bioprospecting in Antarctica, therefore, is a problem that demands carefull and thoughtfull considerations, yet to be resolved.

Submitted by Marcos Wanderley (marcos.wanderley@ufcg.edu.br) on 2018-07-25T22:10:41Z No. of bitstreams: 1 LEYLLANNE RENALLE BATISTA DE ALMEIDA - DISSERTAÇÃO(PPGEPM) 2017.pdf: 12325381 bytes, checksum: fce49fc6ad696f06078e766798c43c30 (MD5) / Made available in DSpace on 2018-07-25T22:10:41Z (GMT). No. of bitstreams: 1 LEYLLANNE RENALLE BATISTA DE ALMEIDA - DISSERTAÇÃO(PPGEPM) 2017.pdf: 12325381 bytes, checksum: fce49fc6ad696f06078e766798c43c30 (MD5) / A ampla utilização do método sísmico de prospecção na indústria de petróleo para gerar imagens das estruturas geológicas que encontram-se em subsuperfície e para o monitoramento dos reservatórios de petróleo torna essencial o conhecimento das propriedades petrofísicas e dos fatores que as afetam. Neste contexto, esta pesquisa tem como objetivo realizar o estudo petrofísico e petrográfico de trinta amostras de rochas sedimentares (arenitos e calcários), provenientes de formações estadunidenses, consideradas padrões na indústria. Foram realizados ensaios de caracterização petrofísica convencional, por métodos laboratoriais, empíricos - através dos modelos de substituição de fluidos - e simulações por modelos computacionais, utilizando os softwares Avizo Fire 8.1 e COMSOL Multiphysics 5.1, bem como a análise composicional a partir da difratometria de raios X e da descrição de lâminas delgadas em microscópio ótico. Os ensaios petrofísicos foram realizados em diferentes condições de pressão e saturação. As propriedades petrofísicas foram influenciadas por diversos parâmetros, que se diferenciam de acordo com o tipo litológico da rocha. A saturação das rochas não atingiu 90%, sendo para as rochas de matriz dolomítica muito inferior quando saturadas com óleo, possivelmente devido às mesmas serem molháveis a água. A saturação fluida influencia definitivamente nas propriedades elásticas das rochas em ambos os métodos estudados. Quando saturados com óleo, a maioria dos plugues apresentaram velocidades compressionais maiores em comparação às outras condições de saturação (seca ou saturada com água). Os modelos de Gassmann e Brown & Korringa mostraram-se mais representativos para as ondas compressionais, sendo em alguns casos eficientes também para as cisalhantes. O modelo de Biot mostrou-se mais eficiente para as ondas cisalhantes, principalmente nos arenitos. O método computacional mostrou-se eficaz visto que a velocidade compressional, pelo menos para um dos pontos receptores escohidos, se aproxima ou coincide com o valor medido laboratorialmente. Os resultados obtidos mostram que o conjunto de amostras estudado apresenta um bom potencial para reservatório. A composição mineralógica por DRX apresentou um bom ajuste com a densidade de grãos medidas convencionalmente. / The wide use of seismic prospecting method in the oil industry to generate images of geological structures that are found in subsurface and to the monitoring of petroleum reservoirs makes it essential to the knowledge of the petrophysical properties and the factors that affect them. In this context, this research aims to carry out the petrophysical and petrographical study of 30 samples of sedimentary rocks (sandstones and limestones) from American formations, considered standards in the industry. Petrophysical characterization tests were carried out by conventional laboratory methods, empirical-through fluid-replacement models and simulations by computer models, using the software Avizo Fire 8.1 and COMSOL Multiphysics 5.1, as well as the compositional analysis from the x-ray diffractometry and thin sections description in optical microscope. The petrophysical tests were performed under different conditions of pressure and fluid saturation. The petrophysical properties were influenced by several parameters, which differ according to the lithological rock type. The saturation of rocks not reached 90%, being much lower for dolomitic matrix rocks when saturated with oil, possibly due to their water wettability. Fluid saturation influences definitely in elastic properties of rocks in both methods studied. When saturated with oil most of the samples show higher compressional velocities as compared to other conditions of saturation (dry or saturated with water). The models of Gassmann and Brown & Korringa were more representative for the compressionais waves, being efficient in some cases also for the shear ones. Biot model proved to be more efficient for shear waves, especially in sandstones. The computational method proved effective as the compressional velocity, at least for one of the receivers, approaches or matches the value measured in the laboratory. The results obtained show that the set of samples studied presents good potential for reservoir. The mineralogical composition by DRX presented a good fit with the grain density measured conventionally.

The availability of prospective customer information present on social media platforms has led to many marketing and customer-facing departments utilizing social media data in processes such as demographics research, and sales and campaign planning. However, if your business needs require further filtration of data, beyond what is provided by existing filters, the volume and rate at which data can be manually sifted, is constrained by the speed and accuracy of employees, and their digital competency. The repetitive nature of filtration work, lends itself to automation, that ultimately has the potential to alleviate large productivity bottlenecks, enabling organizations to distill larger volumes of unfiltered data, faster and with greater precision. This project employs automation and artificial intelligence, to filter Linkedin profiles using customized selection criteria, beyond what is currently available, such as nationality and age. By introducing the ability to produce tailored indices of social media data, automated filtration offers organizations the opportunity to better utilize rich prospective data for more efficient customer review and targeting.

A prospecção biológica (i.e. bioprospecção) é uma atividade, relativamente recente, que ocorre de forma desregulada na região austral, área de vigência do Sistema do Tratado da Antártida (STA). A normatização desta atividade no âmbito do STA é o principal tema em discussão na agenda do Regime Antártico. Este Regime Internacional, constituído pelo Tratado Antártico (de 1959), pela Convenção para Preservação das Focas Antárticas (de 1972), pela Convenção para Conservação dos Recursos Vivos Marinhos Antárticos (de 1980) e pelo Protocolo de Proteção Ambiental do Tratado da Antártida (de 1991), tem cumprido, ao longo de sua história, a missão de preservar a região austral e ordenar as atividades antárticas. Os Estados que o integram, enfrentam os novos desafios, criando instrumentos jurídicos para regulamentar atividades específicas. Todavia, eles encontram dificuldades de repetir este comportamento com relação à bioprospeccão. A razão disso é a complexidade desta atividade, associada à problemática da região austral, uma área sem soberanias reconhecidas. Existe imensa dificuldade de desenvolver uma legislação para contemplar diferentes interesses nacionais, disputas entre empresas e organizações ambientalistas, razões de ordem comercial e desacordos entre os interesses de pesquisa científica e do mercado, respeitando as normas e os princípios formalizados no Tratado Antártico. A bioprospecção na Antártida é um problema cuja solução, provavelmente, demandará longas e difíceis negociações. / Biological prospecting (i.e. bioprospecting) is a relatively recent activity that occurs unregulated in the austral region, area covered by the Antarctic Treaty System (ATS). The normatization of this activity is the main subject being discussed in the agenda of the Antarctic Regime. This International Regime, comprised by the Antarctic Treaty (1959), the Convention on the Conservation of Antarctic Seals (1972), the Convention on the Conservation of Antarctic Marine Living Resources (1980) and the Madrid Protocol to the Antarctic Treaty (1991), fulfills the mission to preserve the austral region and regulate international relations with respect to Antarctica. The nation-states, participants in this regime, have a tendency to face new challenges, by creating aditional agreements to regulate specific activities. Bioprospecting, however, has proven dificult to regulate. This is due to the complexity of the activity and the ambiguous territorial status of Antarctica. It is dificult to develop legislation that satifies interests of nation-states, private companies, environmental NGO’s, scientists and universities, while respecting norms and principles formalized in the Antarctic Treaty. Bioprospecting in Antarctica, therefore, is a problem that demands carefull and thoughtfull considerations, yet to be resolved.

Orientadores: Carlos Roberto de Souza Filho, Thomas John Cudahy / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências / Made available in DSpace on 2018-08-16T19:08:54Z (GMT). No. of bitstreams: 1 Salles_RodrigodosReis_M.pdf: 29354186 bytes, checksum: cd94ec7b06a8ec3077ab99b2519adafe (MD5) Previous issue date: 2010 / Resumo: O depósito metamórfico-hidrotermal de U-ETR Mary Kathleen, localiza-se à NW de Queensland, Austrália e está inserido na Província Metamórfica Mount Isa. Os litotipos predominantes nessa região compreendem rochas sedimentares (calcários, folhelhos e etc.), rochas vulcânicas (riolitos, basaltos, dacitos e etc.) e, subordinadamente, rochas granitóides (granodiorito, leucogranito porfirítico e etc.), metamorfisadas entre as fácies xisto-verde à anfibolito. O depósito Mary Kathleen (1550 Ma), atualmente exaurido, ocorre associado a skarns enriquecidos em U-ETR. A área de estudo contém ainda várias ocorrências de U com expressivas concentrações, além dos prospectos uraníferos Rita e Elaine Dorothy. Esta tipologia de depósito distingue-se dos principais depósitos mundiais de U pela ocorrência de alterações do tipo cálcio-silicática, granatização e metassomatismo de contato. Para tanto, foram necessárias condições físico-químicas especiais impostas pela instalação de intrusões graníticas de composição intermediária e ácida sobre calcário impuro, exatamente o caso da Mina Mary Kathleen. No presente estudo, são investigadas as assinaturas radiométricas regionais e as assinaturas hiperespectrais associadas aos minerais vetores da mineralização uranífera. No primeiro capítulo, dois métodos e técnicas de manipulação e integração de dados são comparados, com o objetivo de compilar mapas preditivos visando proporcionar subsídios adicionais à prospecção uranífera regional. Os mapas compilados pela abordagem Geoestatística foram fundamentados na análise das variáveis quanto a sua posição e variabilidade. O método baseado em Lógica Fuzzy reuniu mapas auto-explicativos ainda não experimentados na pesquisa mineral para a commodity U. Nesta conjuntura, áreas com alto potencial prospectivo foram evidenciadas a partir da integração dos dados aeroradiométricos. No segundo capítulo, imagens adquiridas pelo sensor hiperespectral HyMap foram processadas segundo um conjunto de métodos para extração de informações mineralógicas de detalhe. O principal resultado deste estudo foi a determinação das assinaturas hiperespectrais dos minerais satélites da Mina Mary Kathleen. Parte desta associação mineral consiste de minerais passíveis de detecção remota como a andradita, o epidoto, a hornblenda, a calcita e a escapolita. A análise espectral revelou ainda outros minerais tais como, goethita, caulinita e montmorillonita nas proximidades e frente de lavra da mina. Os cartogramas de abundância mineral, resultantes dos métodos de classificação hiperespectral Spectral Angle Mapper (SAM) e Mixture Tuned Matched Filtering (MTMF) foram combinados no espaço de cores RGB. Esta estratégia permitiu delinear áreas de domínio e mistura de minerais com grande aplicabilidade na pesquisa mineral uranífera / Abstract: The Mary Kathleen Metamorphic-Hydrothermal U-REE Deposit of northwest Queensland, Australia is inserted in the Mount Isa Metamorphic Province. The predominant rock types in the study area are represented by sedimentary rocks (limestone, shales, etc.), volcanics rocks (rhyolite, basalt, dacite, etc.) and subordinate intrusive rocks (granodiorite, porphyritic leucogranito, etc.) metamorphosed in green schist to amphibolites facies conditions. This Mary Kathleen deposit (1550 Ma), now depleted, is associated with skarns enriched in U-REE. Nevertheless, there are U occurrences with significant concentrations; also there are two prospectus uraniferous, Rita and Elaine Dorothy. This deposit type differs from the major world U deposits because of the paragenesis calc-silicates, garnetization phase and contact metasomatism. Thus, it is necessary physicochemical conditions imposed by granitic intrusions of intermediate and acid compositions upon impure limestone, as the case of Mary Kathleen Mine. In this study, we investigate the regional airborne radiometric and hyperspectral signatures associated with mineral vectors of uranium mineralization. In the first chapter, we compared two methods and techniques for handling and integration data to build predictive maps to support uranium mineral exploration. The maps compiled by the first technique were based on statistical analysis of the variables of position and variability. While the second method, based in Fuzzy Logic, compiled self-explanatory maps untried in mineral exploration for the commodity U. At this juncture, prospective areas with high potential were evidenced from the data integration of airborne gamma-ray. The second chapter, discuss the methods and techniques for hyperspectral remote sensing and digital image processing for airborne scanner HyMap image. The goal of this study was the analysis of hyperspectral signatures of calc-silicate paragenesis of Mary Kathleen Mine exposed by HyMap spectrum. Part of this mineral association consists of allanita, uraninite, andradite, epidote, hornblende, calcite and scapolite. Also, the spectra nalysis revealed occurrence of minerals such as goethite, kaolinite and montmorillonite nearby mining an open pit mine. The maps on mineral abundance resulting from the methods of hyperspectral classification of Spectral Angle Mapper (SAM) e Mixture Tuned Matched Filtering (MTMF), after compile mineral abundance maps were combined in RGB color space. This strategy allowed enhancing areas of domain and mineral mix with great applicability to uranium mineral exploration / Mestrado / Geologia e Recursos Naturais / Mestre em Geociências

Orientadores: Jacinta Enzweiler, Otávio Augusto Boni Licht / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências / Made available in DSpace on 2018-08-22T23:05:18Z (GMT). No. of bitstreams: 1 Barros_FernandaCeciliaDias_M.pdf: 7061274 bytes, checksum: fb0d51f8e86e9f4450483280c29b5fc9 (MD5) Previous issue date: 2012 / Resumo: O uso da geoquímica de gases ou emanometria é um método com grande potencial em prospecção mineral de depósitos não aflorantes e/ou encobertos por rochas não-mineralizadas, porém ainda é pouco utilizado. A temperatura de formação da mineralização é um fator determinante à presença de alguns elementos- traço, dentre eles o Hg. Existe uma predileção do Hg por depósitos de zinco de baixa temperatura do tipo epitermal e stratabound. O depósito de Zn-Pb-Cu de Santa Maria, localizado na Bacia do Camaquã, município de Caçapava do Sul (RS) contém Hg associado à mineralização e, por isso, foi escolhido como área piloto para testes de emanometria. O objetivo desta pesquisa foi medir a concentração de Hg gasoso in situ e avaliar a sua potencialidade na prospecção de depósitos sulfetados de zinco. A concentração de Hg gasoso no ar foi medida ao longo de um percurso de 11 km com um espectrômetro portátil de absorção atômica a fim de definir a concentração de Hg atmosférico local, que variou de 2 a 10 ng/m3. O Hg gasoso no solo foi medido em buracos escavados em profundidades de 30 e 50 cm e a sucção do ar para o interior do espectrômetro, atingindo valor máximo de 19 ng/m3 acima da mineralização. Amostras de solo e de duas espécies de vegetação também foram analisadas. O tratamento estatístico dos resultados mostrou que o background de Hg medido nas amostras de solo variou entre 3,9 e 28 ng/g Hg, enquanto o background obtido para as amostras de carqueja (Baccharis trimera) variou entre 10,5 e 38 ng/g Hg. Os valores de background local e o padrão de anomalia gerado demonstraram que o Hg atmosférico, o Hg gasoso (especialmente em 30 cm) e a carqueja foram os meios amostrais mais eficientes para detectar a mineralização pela medição do mercúrio. As amostras de solo e vassourinha (Dodonea viscous) geraram uma fraca resposta geoquímica da mineralização. A localização e a dimensão das anomalias de Hg puderam ser associadas à mineralização sulfetada de Santa Maria, ao sistema de Falha Três Figueiras e atividades antrópicas na área / Abstract: The use of gas geochemistry or emanometry is a method with great potential in mineral exploration of deep ore deposits covered by non-mineralized rocks, although rarely used. The temperature of the mineralization is a determinant factor for the presence of certain trace elements, including Hg. There is an affinity of Hg for low temperature zinc deposits, especially epithermal and stratabounds type deposits. The Zn-Pb-Cu deposit of Santa Maria, located in Camaquã Basin, Caçapava do Sul (RS) contains Hg associated to the mineralization and was chosen as pilot area to test emanometry. The objective of this research was to measure gaseous Hg in situ and to evaluate the potentiality of its use in prospection of zinc sulfide deposits. The air Hg gas concentration was measured along a trajectory of 11 km with a portable atomic absorption spectrometer, resulting in atmospheric Hg concentrations that varied between 2 to 10 ng/m3. The Hg gas in soil was measured in holes excavated at depths of 30 and 50 cm by air suction into the spectrometer, attaining 19 ng/m3 over de mineralization. Soils and two species of vegetation were also sampled and analyzed. The statistical treatment of data showed that background Hg in soils samples varied between 3.9 and 28 ng/g, while the Hg in gorse (Baccharis trimera) varied between 10.5 and 38 ng/g. The local background values and the pattern of the anomaly showed that atmospheric Hg, gas Hg in soil (especially at 30 cm depth) and gorse were the most efficient sample media to detect the mineralization by using Hg. The soil and florida hopbush (Dodonea viscous) produced a weak geochemical response of the mineralization. The location and the dimension of Hg anomalies could be associated to the Santa Maria deposit, to the Três Figueiras fault system and to anthropogenic activities in the area / Mestrado / Geologia e Recursos Naturais / Mestra em Geociências

The Mount Ayliff Complex (MAC) is situated on the border between Kwa-Zulu Natal and the Eastern Cape provinces in the Republic of South Africa, approximately 90 km due west of Port Shepstone. The Complex forms part of the Karoo Igneous Province and includes five lobes (Ingeli, Insizwa, Tonti, Tabankulu, and Horseshoe) that are the remnants of a single continuous intrusive sheet that had an original extent of 18,000km2• The current outcrop is estimated at 800km2• The lobes all show extensive internal differentiation, from basal ultramafic cumulates to diorites and monzonites at the top, while most other intrusions in the Karoo Igneous Province cooled rapidly enough to produce relatively homogenous dolerites. Most work conducted on the Complex thus far has centered on the Insizwa lobe due to the presence of a Ni-sulphide occurrence near the base of the lobe at Waterfall Gorge. The setting of the ores has analogies to the Noril'sk-Talnakh deposits, which has raised considerable exploration interest on the Mount Ayliff Complex over the last century. The current study investigates the Ni-Cu sulphide potential of the Ingeli and Horseshoe lobes, which have been poorly studied in the past. To this effect, a stream sediment survey was conducted around the Ingeli lobe to try and detect potentially hidden magmatic sulphide ores. Further, the five lobes of the Complex have been compared in terms of lithology and lithogeochemistry. Analytical techniques used for the current study include: XRF, ICP-MS and electron microprobe. Stream sediment samples were analysed using XRF and ICP-OES. Olivines from the ultramafic cumulates of the Ingeli and Insizwa lobes are undepleted in Ni, whereas olivines from the Horseshoe and Tabankulu lobes are strongly depleted in Ni. This suggests that the rocks of the latter two lobes crystallized from parental magmas that interacted with a sulphide liquid and that the magmatic flow direction was from the north to the south. The data indicate that the ultramafic rocks of the Complex plot on or near control lines between olivine and Karoo dolerite indicating that the rocks are mixtures of cumulus olivine and trapped melt of Karoo dolerite composition. There appears to be a copper enrichment towards the top of the ultramafic package in the Ingeli lobe. This pattern corresponds to other studies conducted in the InsiZWa lobe and suggests that the two lobes had originally been connected. The lowermost cumulates of the Ingeli lobe contain an enhanced crustal component suggesting some in situ contamination. No significant sulphide enrichments were encountered in the Basal Zone rocks of the Ingeli lobe. However, the stream sediment data indicate localized PGE enrichment indicating the possible presence of a localized hidden sulphide occurrence of the type found at Waterfall Gorge. Small amounts of sulphides were found associated with the Basal Zone rocks in the Horseshoe lobe consistent with the trends of Ni-depletion of olivines. However, a lack of Co depletion in the ultramafic rocks of this lobe suggests that any sulphide segregation event that did take place was of a relatively small scale. / Dissertation (MSc)--University of Pretoria, 2006. / Geology / MSc / Unrestricted