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The behaviour of the elements Ni, Co, Cu, Pb, Zn, Au, Ag, Mo, Sn, W and U in the magmatic, hydrothermal, sedimentary and weathering environments

  • Authors: Anderson, J R
  • Date: 1979
  • Subjects: Elements , Environment , Ore deposits , Classification , Geochemistry , Crystal chemistry
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4896 , http://hdl.handle.net/10962/d1001555
  • Description: In the last two decades much has been published on the behaviour of certain elements in the magmatic , hydrothermal, sedimentary and weathering environments , but the information is scattered throughout the literature . This situation prompted the present study on the elements Ni, Co, Cu, Pb , Zn , Au, Ag , Mo , Sn, W and U. The behaviour of the elements Ni, Cu, Pb , ZN, Au, Sn , W and U has been studied experimentally in some depth. Ag has been moderately studied, but there is very little information about Co and Mo. Studies on the complexes formed by the elements within the hydrothermal and aqueous environment are often inconclusive and controversial , but conclusions are drawn as to the more likely complexes formed . A genetic classification of ore deposits is used as a framework for the discussion . The source of the elements is regarded as being the mantle, and therefore discussion on other possible sources is beyond the scope of this dissertation. The crystal chemistry and geochemistry of the elements are presented and the essay concludes with a discussion on the elements within their depositional environments
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  • Date Issued: 1979

Symbolism and imagery in the story of Cupid and Psyche in Apuleius' Metamorphosis

  • Authors: Beattie, Shannon Boyd
  • Date: 1979
  • Subjects: Apuleius. Metamorphoses
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3625 , http://hdl.handle.net/10962/d1009511
  • Description: A study of the story of Cupid and Psyche within the context of the Metamorphoses as a whole reveals a recurrent pattern of themes, motifs, and images, which indicates that the story symbolises the experiences of Lucius. The Judaeo-Christian Greek meaning of psyche, oneself, implies that Psyche is a symbol of Lucius. This is borne out by the similarity of their experiences, and by the fact that they both have the same character traits of simplicitas and curiositas. Cupid's warnings to Psyche concerning the control which Fortuna has over her life further establish the connection between Psyche and Lucius, whose life is controlled by blind Fate. Military imagery, and images of light and dark, which occur in connection with Cupid and Psyche, also describe the experiences of Lucius. Venus symbolises Isis, as is indicated by Isis' identification of herself as Venus, in addition to many other deities, at the end of the Metamorphoses. Once again imagery, this time of the sea, makes this relationship clear, while military imagery implies a parallel between the relationship of Psyche and Cupid, and that of Lucius and Fotis. Jupiter intervenes in Psyche's misfortunes, just as Isis saves Lucius from his hardships. Juno and Ceres are also identified with Isis at the end of the Metamorphoses, thus linking the story of Cupid and Psyche with the life of Lucius.
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  • Date Issued: 1979

Gold mineralization in archaean cherts and iron-formations a review of the economic geology

  • Authors: Bellamy, R E S
  • Date: 1979
  • Subjects: Gold ores -- Geology -- South Africa , Gold mines and mining -- South Africa , Greenstone belts -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4968 , http://hdl.handle.net/10962/d1005580 , Gold ores -- Geology -- South Africa , Gold mines and mining -- South Africa , Greenstone belts -- South Africa
  • Description: The distribution of gold in igneous rocks and minerals is described and discussed. Not all the gold in igneous rocks is contained within early formed crystal lattices. Evidence that gold can be associated with late stage crystallizing phases is described. It is concluded that some of the gold in hydrothermal and volcanogenic deposits may have come from a primary magmatic source rather than having been leached from solid country rock. Gold is probably transported as chloride complexes at temperatures greater than about 300°C. At lower temperatures it is probably transported with other metals as sulphide and thio-sulphide complexes. The precipitation of gold from the transporting medium is brought about by changes in the physico-chemical conditions within that medium. Decrease in pressure is probably not a major cause of precipitation in volcanogenic environments. The geology of volcanogenic iron-formations is described and discussed, relative to the development of greenstone belts. Oxide facies iron-formations were formed in shallow oxidizing environments. They are associated with volcanogenic and clastic sediments. Sulphide facies iron-formations were precipitated in the deeper parts of geosynclinal structures. They are associated with mafic and ultramafic rocks similar to modern oceanic volcanic assemblages. Carbonate facies iron-formations were deposited in the regions between oxide facies and sulphide facies. Other banded iron-formations are found associated with base metal massive sulphide deposits related to arctype volcanic centres. These deposits are found in the regions where carbonate facies iron-formations were formed. Exploration for and exploitation of gold deposits in Archaean iron-formations are discussed. Geochemical exploration programmes are aided by the association of gold with trace amounts of base metals. Geophysical exploration methods that can be employed include magnetometer, I.P. and E.M. surveys. The metallurgical treatment of the ores should include "roasting" because a large proportion of the gold occurs as submicroscopic grains within sulphide mineral crystals.
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  • Date Issued: 1979

The nouvelles of Henry James : a phenomeno-generic approach

  • Authors: Bijker, Antony Jan
  • Date: 1979
  • Subjects: Novelists, American -- 19th century -- Diaries , James, Henry, 1843-1916 -- Notebooks, sketchbooks, etc. , James, Henry, 1843-1916 -- Diaries
  • Language: English
  • Type: text , Thesis , Masters , MA
  • Identifier: vital:2168 , http://hdl.handle.net/10962/d1001819
  • Description: From Introduction: The present work is about the nouvelles of Henry James and not about phenomenology. That is to say that I am more concerned with James's use of the form of the nouvelle than with the illustration of a method. But, as Roland Barthes has pointed out: "How can we tell the novel from the short story, the tale from the myth, suspense drama from tragedy ... without reference to a common model? Any critical attempt to describe even the most specific, the most historically orientated narrative form implies such a model. "I Hence, because phenomenology is somewhat alien to the Anglo-American critical sensibility, I must temporarily reverse this emphasis and discuss the phenomenological "model" that underlies my investigation of James and the nouvelle form. Elsewhere phenomenological theory will take precedence only when it throws light on what is a highly elusive genre.
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  • Date Issued: 1979

Some contemporary issues affecting the South African auditor : inaugural address delivered at Rhodes University

  • Authors: Black, John K
  • Date: 1979
  • Subjects: Auditors -- South Africa , Auditors
  • Language: English
  • Type: Text
  • Identifier: vital:600 , http://hdl.handle.net/10962/d1020669 , ISBN 0868100080
  • Description: Inaugural address delivered at Rhodes University. , Rhodes University Libraries (Digitisation)
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  • Date Issued: 1979

Interview of Mradlui Booi

A review of the economic geology of tungsten

  • Authors: Bowles, Michael
  • Date: 1979
  • Subjects: Tungsten Geology, Economic
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4897 , http://hdl.handle.net/10962/d1001556
  • Description: A description of the geochemistry of tungsten is given. The geochemical properties of tungsten have a strong influence on its mineralogy, distribution and abundance in crustal rocks and rock-forming minerals , and its migration/deposition within the ore-forming and supergene environments. The behaviour of tungsten during migration, from source to site of deposition, within the crust is discussed in some detail and environments considered favourable to the concentration of tungsten ore minerals are suggested. All major types of tungsten ore deposit are described with emphasis placed on those of greater economic importance. Characteristic features of each type of deposit are particularly emphasized in order to provide clear guidelines to exploration. Hydrothermal, pyrometasomatic and stratabound tungsten deposits present themselves, economically, as the most important exploration targets. The recently developed concept of syngenetic stratabound tungsten mineralisation is outlined. Exploration for deposits of this type should be aimed predominantly, but not exclusively, at volcano-sedimentary sequences of Lower Palaeozoic age, particularly within regions known to contain occurrences of Sb and Hg. Tungsten deposits commonly contain concentrations of one or more of the following metals: Sn, Sb, Bi, Mo, Au and Ag. The presence and possible extractive value of these metals, together with commonly associated metal impurities such as As, must always be taken into account in a feasibility study , Adobe Acrobat 9.53 Paper Capture Plug-in
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  • Date Issued: 1979

Stages in the early development of 40 marine fish species with pelagic eggs from the Cape of Good Hope

  • Authors: Brownell, Charles L
  • Date: 1979
  • Language: English
  • Type: Text
  • Identifier: vital:15014 , http://hdl.handle.net/10962/d1019750 , ISBN 0-86810004-8 , Ichthyological Bulletin J.L.B. Smith Institute of Ichthyology; No. 40
  • Description: Pelagic marine fish eggs were collected over a period of 28 months from inshore waters of the Cape of Good Hope. Some 40 species were encountered, of which about 30 were identifiable — either with the aid of published descriptions (particularly those of J. D. F. Gilchrist) or by rearing in the laboratory. Notes are included on the identification of eggs and larvae, duration of the incubation period, spawning season and distribution of the adult, and laboratory rearing. The text is accompanied by 184 figures of eggs, larvae, and juveniles. , Rhodes University Libraries (Digitisation)
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  • Date Issued: 1979

The university and the new foreigners

Narrative technique in ʹBeowulfʹ

Amen

Amen

The incorporation of certain psychological and sociological perspectives into social work intervention : a general systems approach

  • Authors: Collins, Anton Daniel
  • Date: 1979
  • Subjects: Sociol service -- Psychological aspects Social service -- Sociological aspects
  • Language: English
  • Type: Thesis , Masters , MSocSc
  • Identifier: vital:685 , http://hdl.handle.net/10962/d1002010
  • Description: In this dissertation the use of general systems theory as an aid to knowledge building, and the refinement of intervention in social work, is investigated. It is held that the social work view of man, and the profession's declared objectives, determine a structure and function for the client.which cause the social worker to resort to psychological and sociological perspectives in his intervention programme. However, the two disciplines concerned formulate their respective perspectives without regard to each other. The disparity between these perspectives present problems when they are incorporated into social work knowledge. The latter, as it is, is characterized by an unco-ordinated body of suppositions, facts, thoughts and theories. The social work literature on the use of the systems approach displays a lack of detailed description of general systems theory and the open living system. Because of this shortcoming it was decided to pay particular attention to general systems theory and the concept of the open living system. Since a system's view of man forms a firm basis for the appreciation of systems theory in psychology and sociology it was decided to include such a consideration. Following on this is an analysis of two perspectives held to be particularly relevant to social work, viz. the personality system and the social system. This leads finally to a description of the social work client as a system, as a sub-system and as a supra-system. Provision is made for the incorporation of psychological and sociological perspectives in social work intervention. It is subsequently concluded that the application of general systems theory has advantages for social work. It facilitates the incorporation of perspectives for psychology and sociology without distortion, promotes the integration and consolidation of social work knowledge, and brings the discipline into relation with the disciplines of psychology and sociology
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  • Date Issued: 1979

A review of landscape development and erosion cycles in southern Africa

  • Authors: Corbett, Dudley Harold
  • Date: 1979
  • Subjects: Landscape changes -- Africa, Southern Erosion -- Africa, Southern
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4899 , http://hdl.handle.net/10962/d1001558
  • Description: The study of landforms has, to a large extent been neglected by exploration geologists. This is surprising because field geology is intimately related with landforms of one type or another. An understanding of the geomorphological history of a particular area will assist in the appreciation of the surficial environment, the processes of weathering, soil formation and duricrust (calcrete , ferricrete silcrete) formation. This has direct application in planning and interpreting geochemical sampling programmes. In order to understand the evolution of landforms it is necessary to study slope development in some detail. Agents of erosion and denudation constantly at work, remove detritus from hillcrests down to the drainage lines which form the local base level from whence material is transported down to the sea. The system is one of dynamic equilibrium, and the concept of grade is important in understanding hillslope evolution. Thus Section (1) of this discussion deals with past and present theories of hillslope evolution. Very little work has been done recently on the geomorphology of Southern Africa and the presently accepted classification of land surfaces is based on the work of Prof. L.C. King (numerous publications). However, through the more recent work of De Swardt and Bennet (1974) on the geomorphology of Natal, it is apparent that the present system of landform classification in Southern Africa requires widespread revision. The relationship of erosion cycles in Southern Africa to the late Jurassic-early Cretaceous break-up of Gondwanaland has received insufficient attention in the past. Erosion cycles bear an intimate relationship to offshore Cretaceous and Tertiary-Recent sedimentation. Valuable information on these sediments has only recently become available as a result of offshore exploration for oil. The findings of De Swardt and Bennet (1974) are summarized in Section (2) and the present land surface classification of Southern Africa is reviewed. Finally, some suggestions on a new interpretation of land surfaces in Southern Africa are given.
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  • Date Issued: 1979

Protest in fiction : an approach to Alex la Guma

  • Authors: Cornwell, David Gareth Napier
  • Date: 1979
  • Subjects: La Guma, Alex , South African literature (English) -- Black authors -- History and criticism , Protest literature, South African (English) -- History and criticism
  • Language: English
  • Type: text , Thesis , Masters , MA
  • Identifier: vital:2169 , http://hdl.handle.net/10962/d1001820
  • Description: From Introduction: Thus for the black South African, the act of creative writing is inescapably a form of political action, and unless he turns his back on the reality which confronts him and retreats into a private imaginary world, it is also a form of social action, Yet Ezekiel Mphahlele has rightly cautioned that "creating an imaginary world" can never be an effective substitute for social act ion . Composing fictions about social and political problems is an indubitably oblique way of seeking a solution to them, and even the tendentious recreation of reality is only a metaphor for its actual transformation. Protest writing in South Africa is paradoxically a form of social action which is also only a parasitical imitation of social action, and therefore its avoidance . The freedom of literary creation described above is ambiguously not only a freedom to express reality, but also a freedom from the constraints of reality. And this suggests why the outlaw was such an important symbol to an earlier generation of rather more self-conscious writers.
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  • Date Issued: 1979

The development of an improved coded-pulse, vertical-incidence ionosonde

  • Authors: Cretchley, Brian Brind
  • Date: 1979
  • Subjects: Ionosondes Ionospheric sounds Computer simulation
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5436 , http://hdl.handle.net/10962/d1001989
  • Description: This thesis describes the theoretical development of a new ionospheric sounding system. The different types of ionosonde, their prime objectives, and their relative merits and demerits are discussed. The various types of code and their correlation functions are described. The essential requirements of the new system are listed, and suitable codes are found for it. Computer calculations and mathematical derivations demonstrate the (theoretical) suitability of these codes under all conditions. Essentials of the mode of operation of the system and details of its design are specified, and computer simulations are used to examine relevant aspects of its operation. Finally, since the construction of the system is not complete and results cannot therefore be presented, the present state of construction of the system is described
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  • Date Issued: 1979

Ntsikana's Bell

A study of the utilisation of East London harbour and its relative importance in the South African import and export trade, to 1975

  • Authors: De Beer, David Petrus
  • Date: 1979
  • Subjects: Harbors -- South Africa -- East London , Exports -- South Africa -- East London , Imports -- South Africa -- East London , Export marketing -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:835 , http://hdl.handle.net/10962/d1013316
  • Description: From Ch. 1: The object of this study is to consider the utilisation of East London Harbour and its relative importance in the South African import and export trade to 1975. The principal harbours of the Republic of South Africa are Table Bay (Cape TOwn), Algoa Bay (Port Elizabeth), Buffalo Harbour (East London) and Durban, and Walvis Bay in South West Africa. Small harbours suitable only for coastal shipping are Mossel Bay, Simonstown, Lamberts Bay, St. Helena Bay and Port Nolloth in the Republic and LUderitz in South West Africa. Two harbours, Saldanha Bay and Richards Bay are at present being built. The ports of the Republic of South Africa and South West Africa are owned by the Government, are constructed, controlled and operated by the South African Railways and Harbours Administration, under the direction of the Minister of Transport, and are managed by the General Manager, whose headquarters are in Johannesburg.
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  • Date Issued: 1979

Interaction and transaction: a study of conciliar behaviour in a Black South African township

Time and tense in English

  • Authors: De Klerk, Vivian A
  • Date: 1979
  • Subjects: English language -- Tense -- Study and teaching , English language -- Adverbials -- Study and teaching , Language and logic -- Study and teaching , Linguistics -- Study and teaching , Generative grammar -- Study and teaching
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2344 , http://hdl.handle.net/10962/d1002626 , English language -- Tense -- Study and teaching , English language -- Adverbials -- Study and teaching , Language and logic -- Study and teaching , Linguistics -- Study and teaching , Generative grammar -- Study and teaching
  • Description: It has not been my aim to provide conclusive evidence for or against anyone hypothesis regarding Time and Tense. I have simply attempted to collect together and collate much of what has been written on the topic of tense in English, in order to show what the current trends of thought are. In Chapter One I presented a brief survey of some of the more basic notions associated with time and tense, in order to provide a background for the more linguistic approach to follow. I therefore examined such issues as the difference between time and tense, the problem of the passage and directionality of time, of the present moment, time and space , tense as a universal, "and various features of tense systems. I sketched Bull's system of scalars, vectors and axes as representative of our English tense system. Chapter Two dealt with time and logic, but as I am a mere layman in matters logical, I refrained from discussing any individual logical system in depth, and rather discussed various problems which appear to confront the logician in formulating a tensed or tenseless logic. This chapter aimed at providing a better understanding of the linguistic issues to follow, for time and logic are intimately connected with language. Chapter Three was more linguistically oriented, and in it I attempted to provide a broad outline of the development of thoughts about tense before the Transformationalist period (pre 1960). Because of the vast scope involved, I had, perforce, to be brief at times. I gave attention to tense in classical grammatical studies, and summarized how it was seen from about 1500 to 1800. I gave more detailed treatment to the twentieth century, focussing specifically on grammarians like Jespersen (1933), Twaddell (1960), Ota (1963), Palmer (1965) and others - all, writers typical of the structuralist era. At the end of Chapter Three I provided an overall summary of ideas on the main tenses by the end of the structuralist period - ideas which were to change radically within the next few years. In Chapter Four I discussed the ideas of tense of some of the main transformationalist/generativists - Diver (1964), Crystal (1966), Huddlestone (1968), Gallagher (1970), McCawley (1971) and Seuren (1974), in an attempt to show how theories on tense were becoming increasingly abstract, and how most data indicated that it is highly probable that tense is an abstract higher predicate of the sentence in which it appears in surface structure, closely related to temporal adverbs. Chapter Five continued in the same vein. I tried to show, using syntactic tests, that tense is a higher predicate, and used arguments involving Conjunction Reduction (based on Kiparsky (1968)), VP Constituency, Sequence of Tense, Pronominalization, and Quantification. In Chapter Six I focussed more closely on tense-time adverbials, in order to show that they have the same syntactic properties as tense, are also probably deep superordinate predicates, and are closely related to tense. My suggestion was that either tense is derived from temporal adverbs or vice versa, as this would simplify the grammar. The derivation procedures at the end of the chapter (6.8) were largely based on Hausmann (1971). I made no detailed reference to extralinguistic matters which affect tenses, in this study - such factors as are diScussed by G. Lakoff (1971) (presuppositions and relative well-formedness) and by R. Lakoff (1975). Tense is not a matter of pure Structuralism, just as language is not - extralinguistic factors ought to be accounted for before any study can claim to be conclusive. For this reason I do not in any way claim to have made an exhaustive study of time and tense - I have simply attempted to summarize and coordinate thoughts on the subject, and to suggest tentatively that the most adequate grammar of English would probably derive tense from underlying temporal adverbs.
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  • Date Issued: 1979
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