The economic geology of the Okiep copper deposits, Namaqualand, South Africa
- Authors: Gadd-Claxton, D L
- Date: 1981 , 2013-04-04
- Subjects: Geology, Economic -- South Africa -- Okiep , Copper ores -- South Africa -- Okiep , Okiep (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4923 , http://hdl.handle.net/10962/d1004507 , Geology, Economic -- South Africa -- Okiep , Copper ores -- South Africa -- Okiep , Okiep (South Africa)
- Description: The Okiep Copper District situated in the north-western Cape Province, covers some 3 000 km and is the oldest mining area in the Republic of South Africa. The O'okiep Copper Company Limited commenced production in 1940 with a proven ore reserve of 9 million tons at 2,45 % cu. Production since 1940 and present ore reserves total some 93 million tonnes at 1,08 % Cu. The rocks comprising the Okiep Copper District are of Proterozoic age and have been subdivided into a meta-volcanosedimentary succession, intruded by various sub-horizontally emplaced granitoid intrusions. The various intrusions occurred at different stages relative to the main structural and metamorphic events. The copper deposits are confined to basic rocks which are the youngest major group of intrusives in the District. They occur as swarms of generally easterly-trending, steep northdipping, irregular dyke-like bodies consisting of diorite, anorthosite and norite. The dominant silicate constituents are andesite ranging to labradorite, hypersthene, biotite and phlogopite. Copper sulphides are preferentially associated with the more basic varieties. The copper sulphides are mainly chalcopyrite, bornite and subsidiary chalcocite. The copper content of the basic rocks is erratic ranging over small distances from a mere trace to several percent. Emplacement of the cupriferous basic rocks is predisposed to a large extent by enigmatic structural features locally referred to as steep structures. The most common manifestation of steep structure deformation is typically a narrow antiformal linear feature along which continuity of the country rocks has been interrupted by piercement folding and shearing. In places, pipelike bodies of megabreccia occur along steep structures, and also act as hosts to the basic rock. Areas of steep structure are thus prime exploration targets, due to their close spatial association with the cupriferous basic rocks. Exploration techiques employed in the Okiep Copper District in~ elude regional and detailed geological mapping, geophysical surveys utilizing magnetic, gravimetric and electrical methods, as well as limited application of soil and stream-sediment geochemistry. Final evaluation is by surface and underground diamond drilling. Exploration has to date discovered 18 new mines with individual ore reserves ranging from 200 000 to 37 000 000 tonnes. All are underground operations, and the sub-level open stoping method of mining is standard.
- Full Text:
- Date Issued: 1981
The elements of job evaluation in the development of a pay structural comparison system guide to conducting compensation surveys to determine competitive adjustments to base salary ranges
- Authors: Snelgar, Robin John
- Date: 1981
- Subjects: Wage surveys , Job evaluation , Job analysis
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3118 , http://hdl.handle.net/10962/d1004726
- Description: If the wage policy of an organisation is to remain competitive in the labour market, that is, pay rates that are at least approximately equal to those prevailing in the community, then it must collect accurate wage and salary data in order to alter its pay structure as may become necessary. Wage and salary survey information provides a means by which management can determine whether its entire wage level is in accordance with that of the external labour market, and thus it is absolutely essential that methods and techniques utilised to collect such information are as objective and accurate as possible. The vital factor which has been revealed by the utilisation of many existing wage and salary survey guides is that the unavoidable subjectivity involved in the basic techniques utilised in survey procedures tends to have a cumulative effect on both data collection and analysis, and ultimately interpretation. As each technique is utilised, whether it be to obtain job comparability or to adjust salary data, the overall level of subjectivity is increased, which results in a cumulative increase in the margin of error involved in data collection. This study has been aimed at developing and practically testing a comprehensive guide to conducting wage and salary surveys which effectively minimises and, over successive surveys, eradicates the necessity for these subjective techniques. Due to the fact that the elements of job evaluation, namely, job analysis, job description, job specification and the job evaluation plan itself, form the nucleus of the techniques utilised for the data gathering and analysis process, the initial study was aimed at developing a job evaluation process which would be as objective as possible. In the development of such a system a range of job evaluation plans were tested for comparability in rating of jobs, the hypothesis being that any evaluation method or plan, when correctly applied to a series of jobs, will result in the same classification. This study intercorrelated rates derived for twenty-four key jobs selected from one particular organisation, using the job evaluation methods utilised by sixteen different organisations, and found that these rates intercorrelated between 0,93 to 0,99. These intercorrelations indicate a high degree of commonality among the sixteen methods; thus providing a justification for the utilisation of one particular job evaluation plan for the adjustment and weighing of wage and salary data in the survey data analysis procedure. To further justify the utilisation of one particular method, and thereby increase probability of acceptance by participating organisations, the independence of the sub-factors of the selected plan were tested by intercorrelating the factor scores for two job samples, one consisting of sixty jobs, type and level being heterogeneous, the other consisting of forty jobs, type and level being homogeneous. Sub-factor intercorrelations in the group of heterogeneous jobs ranged from 0,71 to 0,98 while all but one correlated at or above 0,90 with the total score, thus emphasising the independence of sub-factors, while intercorrelations in the group of homogeneous sample were much lower, ranging from 0,26 to 0,89, indicating greater factorial independence due to the fact that these jobs are limited to a narrower range of grades such that specific job differences in respect of sub-factors are more likely to show up. Utilising this selected job evaluation plan as the core of the developed job evaluation process, a wage and salary survey guide was formulated, the unique concept being a comparison of participating organisation pay structures rather than comparison of positions as a basis for data collection. The job evaluation system was utilised in the formulation of a "one-time" standardisation of participating organisation pay structures according to the survey organisation pay structure, the hypothesis being that these standardised pay structures may be utilised over successive surveys without the necessity for restandardisation, and thus eliminating the use of subjective methods and techniques subsequent to the initial standardisation. Utilising an international oil company as the survey organisation this newly formulated structural comparison guide was practically tested by applying it in conjunction with the existing survey organisation wage and salary survey guide as a means of competitive market wage and salary data gathering and analysis, over successive survey years, namely, 1974, 1977, and 1980. The results obtained through application of this guide were subsequently compared with those results obtained by two professional survey organisations, and proved to be reliable and consistent enough over the applicable survey years to warrant acceptance of the pay structural comparison concept as a valid wage and salary survey technique.
- Full Text:
- Date Issued: 1981
The liturgies of Guillaume Farel: their meaning and relevance
- Authors: Kaltenrieder, Andre Emile
- Date: 1981
- Subjects: Farel, Guillaume, 1489-1565 Liturgics
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1224 , http://hdl.handle.net/10962/d1004540
- Description: Relatively little study has been devoted to Guillaume Farel. Though a number of Biographies have been published, these were mainly devotional or inspirational. The only critical biography to have been published in modern times, and to which the author has made much reference, is that written by the 'FAREL COMMITTEE' to commemorate the fourth centenary of the reformation at Neuchȃtel. The comparative neglect suffered by Farel and his works is surprising in view of his role as pioneer of the reformation in French-speaking Churches. The spotlight has been held almost exclusively on the second generation reformer John Calvin. The paucity of material available may help explain why Farel has remained such an obscure figure. This dissertation does not attempt to bring to light the full scope of Farel's work. This still has to be done. Incidentally the author has been informed that. there are at present two American post-graduate students doing research on Farel at Neuchȃtel. This may hold a promise of further light on this significant father of the reformation. The author has limited himself here to an examination and evaluation of Farel's liturgical works. These were only a very small portion of his wide field of activity. The further study necessary to investigate the full influence of these liturgies on the development of reformed worship is only outlined here. In order to set the Farellian orders in their context, a certain amount of historical and doctrinal background has been given. This is by no means exhaustive as each service would justify a separate dissertation. An effort has been made to cut background down to a minimum and to bring out the main tendencies only so as to situate Farel in the development of the understanding of the Church 's worship. (Preface)
- Full Text:
- Date Issued: 1981
The poetry of Guy Butler
- Authors: Van der Mescht, Hennie
- Date: 1981
- Subjects: Butler, Guy, 1918-2001 -- Criticism and interpretation , South African poetry (English)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2256 , http://hdl.handle.net/10962/d1004387 , Butler, Guy, 1918-2001 -- Criticism and interpretation , South African poetry (English)
- Description: This study of ButIer's poetry proceeds chronologically in accordance with the dates of composition of his poems. The first task has, therefore, been the compilation of a chronology of his poems. Butler rarely dates his poems; nor does he keep a diary. Yet there are several criteria which make sensible dating of his poems possible. The first is the date of publication of individual poems. Many of the poems which appear in one or more of the five collections were published earlier in army magazines, student newspapers, and the like. A work which can be traced back to one of these early sources may be assumed to have been written fairly soon before its date of publication. Another criterion is subject. It is possible to discern periods in the poet's career in relation to the subjects of his poems. The most obvious example is the War Period. Allied to subject is the criterion of theme. To use the War Period again, poems written during or immediately after the war years all treat the theme of man's dehumanisation. Both subject and theme are linked with biography. It is often possible to ascertain Butler's location from details in the poem; knowledge of his movements thus enables one to date such a poem. Butler's style is the most significant criteion. This study is based on the observation that his style develops as time passes. The Butler of the Sixties is different from the Butler of the Fifties as far as style of writing is concerned. A poem which defies dating on all other grounds cannot escape this ultimate test. Each of these criteria - date of publication, subject matter and theme linked to biography, and style - has limited reliability as a guide to dating the poems. But combined they are a meaningful instrument to assist in the structuring of a chronology whose most valuable source was the poet himself who was kind enough to search his memory for dates. The fact that Butler rewrote or revised a number of his poems several times does of course raise the question: Is the first version merely a stage in the development of the poem, or a poem in its own right? This study is based on the opinion that a poem is a poem, regardless of the number of versions which precede or follow it, provided it is a complete statement. Each version should, in fact, be regarded as representative of the poet's thoughts, feelings, and skills at the time he wrote it, and is lndependent of subsequent versions. For the purposes of this chronology, poems have been placed at the time of the experience from which they grew. This thesis does, however , take cognizance of the ehanges in style or theme later versions may reveal.
- Full Text:
- Date Issued: 1981
The private education of English-speaking whites in South Africa: an historical and contemporary study of Catholic schools and schools belonging to the Conference of Headmasters and Headmistresses
- Authors: Smurthwaite, Alastair Gordon
- Date: 1981
- Subjects: Catholic Church -- Education -- South Africa Church and education -- South Africa Whites -- Education -- South Africa Private schools -- South Africa Conference of headmasters and headmistresses of private schools of South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1868 , http://hdl.handle.net/10962/d1004734
- Description: From Chapter 1: At the 1956 Conference of Headmasters and Headmistresses of Private Schools of South Africa a motion was introduced proposing that the term 'private school' in the title of the Conference should be replaced by that of 'independent school'. The motion was defeated on the grounds that such an alteration would be 'difficult and misleading', (HMC, 1956(1)). This might well have been the case, but the proposer of this motion was no doubt aware that the term 'private school' was equally difficult and misleading.The first problem with the term 'private school' is historical. South Africa was in the British sphere of influence for more than a century and a half and consequently education in South Africa in general and 'private' education in particular has owed a great deal to that influence.
- Full Text:
- Date Issued: 1981
The recording, retrieval and analysis of some electrophysiological measures relevant to psychology
- Authors: Barnes, Robert M
- Date: 1981
- Subjects: Psychology -- Computer programs Electroencephalography -- Research Electrophysiology -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:2914 , http://hdl.handle.net/10962/d1002079
- Full Text:
- Date Issued: 1981
The social and spatial organisation of the Greater kudu (Tragelaphus strepsiceros Pallas 1766) in the Andries Vosloo Kudu Reserve, Eastern Cape
- Authors: Allen-Rowlandson, T S
- Date: 1981
- Subjects: Greater kudu -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5614 , http://hdl.handle.net/10962/d1003120 , Greater kudu -- South Africa -- Eastern Cape
- Description: Methods of capture, marking and age determination in the field, were investigated. The density and structure of the population, individual movements and social relationships were determined. Aspects of reproduction examined included age at puberty, agespecific fecundity, calving intervals and seasonality. Temporal changes in the spatial and social organisation are discussed in relation to environmental conditions, reproduction and population structure. Factors influencing the fecundity, dynamics and grouping patterns within the population are considered.
- Full Text:
- Date Issued: 1981
The study of the potentiation of anticholinergic side effects of tricyclic antidepressives by female sex steroids
- Authors: Kok, Eric Charl
- Date: 1981
- Subjects: Antidepressants , Steroid hormones
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3822 , http://hdl.handle.net/10962/d1005623 , Antidepressants , Steroid hormones
- Description: It has been recorded that women respond to tricyclic antidepressives with a greater incidence of anticholinergic side effects than men do, particularly women taking an exogenous source of oestrogen. The aim of this study was to investigate the influence that ethinyl oestradiol and Premarin© had on the metabolism of a number of tricyclic antidepressives, and also the influence they had on the binding ability of microsomes to imipramine. Rat hepatocyctes and microsomes were used. Detection techniques used were High Pressure Liquid Chromatography and Spectrophotometry respectively. In addition to these studies, a study of the anticholinergic activity of Nomifensine, tricyclic antidepressives and their derivatives was performed on a rat jujenum. Results conclusively showed that ethinyl oestradiol had a marked influence on the metabolism of the tricyclic antidepressives studied. Premarin© had Iittle, if any influence. However, both ethinyl oestradiol and Premarin© affected the binding of microsomes to imipramine, but ethinyl oestradiol had the greater effect. The parent compound in each case exhibited a higher pAZ value. Results indicate that a possible explanation for the increased anticholinergic side effect is due to an inhibition of the metabolism of the tricyclic antidepressives by oestrogen.
- Full Text:
- Date Issued: 1981
Trapped identity in the novels of Dan Jacobson
- Authors: Bekker, Janine
- Date: 1981
- Subjects: Jacobson, Dan -- Criticism and interpretation , Identity (Philosophical concept) in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2260 , http://hdl.handle.net/10962/d1004545 , Jacobson, Dan -- Criticism and interpretation , Identity (Philosophical concept) in literature
- Description: Dan Jacobson has written short stories, many non-fiction articles and eight novels: The Trap (1955), A Dance in The Sun (1956), The Price of Diamonds (1957), The Evidence of Love (1959), The Beginners (1966), The Rape of Tamar (1970), The Wonder-Worker (1973), and · The Confessions of Josef Baisz (1977) . The first five are all set in South Africa, though Jacobson has been living in England since 1954, i.e. since before his first novel was published. A distinct break in terms of subject matter and voice occurs after The Beginners , giving Jacobson what he calls "two rounds as a novelist. But critics recognizing this break seem not to have recognized that all eight novels are linked by certain thematic preoccupations, notably the notion of the trapped identity, which this thesis will attempt to demonstrate. On a first reading of Jacobson's work one is drawn to affirm his portrayal of the position of the white English-speaking South African, but a closer reading reveals that he does not speak as vitally to the South African situation as he seems to, or has been taken to do. Why this should be so is the second main concern of this thesis. In the first chapter the expectations underlying English literary activity in South Africa are outlined, as this is a necessary background to the discussion of Jacobson's South African novels. (Introduction, p. 4)
- Full Text:
- Date Issued: 1981
Vitalis en verteller: 'n ondersoek na aspekte van die romankuns van Gerard Walschap
- Authors: Vaughan , F E M
- Date: 1981
- Subjects: Walschap, Gerard, 1898-1989 , Walschap, Gerard, 1898-1989 -- Criticism and interpretation , Dutch fiction -- 20th century -- History and criticism
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:3607 , http://hdl.handle.net/10962/d1003817 , Walschap, Gerard, 1898-1989 , Walschap, Gerard, 1898-1989 -- Criticism and interpretation , Dutch fiction -- 20th century -- History and criticism
- Description: In 'n hoofstuk getiteld In het teken van het persoonlijkheidsideaal in sy werk De Vlaamse Letterkunde van 1780 tot Heden bespreek R F Lissens die wegeb van die "expressionistische getij met die dood van Van Ostaijen, en die onvermoë van die roman om - op enkele min of meer geslaagde voorbeelde na - die tendense van die ekspressionisme te vertolk: verdere pogings in dié rigting loop dan ook teen die einde van die twintigerjare dood. Ook B F van Vlierden beskou die ekspressionisme as 'n in die grond ongeskikte voedingsbron vir die romangenre, met die gevolg dat die roman in dié jare - d.w.s. na die mln of meer naturalisties-impressionistiese romantradisie verteenwoordig deur Buysse, Streuvels, Timmermans, Claes - "in zijn eigen ontwikkeling op een kritiek keerpunt staat, waarbij men vooralsnog aIleen het kritieke van de situatie ziet ... Het decennium na de oorlog is in feite weinig gunstig voor de roman ... Ook P van Ostaijen heeft gepoogd een 'grote roman' te schrijven, maar deze werd nooit voltooid ... In de marge van het humanitair expressionisme ontstaan weI een aantal prozawerken, maar precies in het licht van de humanitaire poëzie is het vooralsnog duidelijk, dat deze uit een geestelijke kweeste bestaan, en dus een schakeI zijn in de ontwikkeling die van de werkelijkheid wegvoert naar een inwendig leven, naar een geestelijke ontwikkeling." Terselfdertyd, egter, is Lissens en Van Vlierden dit met J Weisgerber eens dat "het Jaar 1927 kan worden beschouwd als het begin van een nieuw tijdperk" en dat die leemte wat na die Eerste Wêreldoorlog onstaan het, weldra gevul sal word met 'n groot aantal romanwerke van 'n besondere gehalte. Die kritiek sien hierdie keerpunt met verloop van tyd al hoe duideliker in, maar erken nietemin óók dat die invloed van die modernisme, en met name die ekspressionisme, ''heilzame gevolgen heeft voor de roman. Niet vergeefs heeft deze beweging de ethische noot aangeslagen, de verantwoordelijkheidszin weer gewekt en al haar aandacht op de mens geconcentreerd. De nieuwe roman, die kort voor 1930 opkomt, kan men bezwaarlijk expressionistisch noemen, maar de grondige omkeer waar hij van blijk geeft, gebeurt ontegensprekelijk onder de invloed van het door het expressionisme gewijzigde klimaat." Anders gestel: "zij (gaan) akkoord met de veroordeling van de impressionistische en naturalistische opvattingen, maar tussen het individualisme van de 'estheten' en de humanitaire kunst van Ruimte, tussen de wetenschappelijke objectiviteit en de lyrische subjectiviteit kiezen zij doorgaans een middenweg. De nieuwe roman - en dat is de reden waarom hij deze benaming verdient - zal aan de individualiteit minder reliëf verlenen dan aan de 'persoonlijkheid', hetgeen wil zeggen dat het individu, dat zich op zichzelf bezint, aldus beseft dat het in morele of juridische zin met een gemeenschap verbonden is. Hij zal de mens tegelijkertijd in zijn individualiteit en in de eigenschappen van zijn soort beschouwen, en hoewel hij het Ik zal peilen, zal hij ook het zoeklicht richten op het onmetelijke terrein van de gemeenschappelijke waarden...". Dit is dus op die groeiende belang van 'n "persoonlijkheidsideaal, een modern humanisme dat sociaal solidair blijft doch de raadselen van de mens en het leven wil peilen" dat die klem tussen die jare 1930 en 1940 val: op "de mens op het voorplan", dus, maar óók op dié mens in gemeenskapsverband.
- Full Text:
- Date Issued: 1981
Vocabulary proficiency in English of students in the primary teachers' certificate course
- Authors: Harlech-Jones, Brian Arthur
- Date: 1981
- Subjects: English language -- Study and teaching (Elementary) Vocabulary -- Study and teaching (Elementary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1903 , http://hdl.handle.net/10962/d1006347
- Description: This work investigates vocabulary proficiency in English of a group of students in the Primary Teacher's Certificate course. It is shown that this is the major certification course for teachers in Black education in South Africa, and, that primary school teachers are the major source of English for Black pupils for a considerable period, if not for the duration of their school education. The quality of the teachers' English thus has a major influence on that used by the pupils. In addition to the established needs for proficiency in a national and international medium such as English, it is emphasized that , with the increasing use of English as a medium of instruction, a lack of proficiency will adversely affect general scholastic achievement. The investigation proceeds by two means: (1) a series of vocabulary tests and (2) an error analysis (lexis and morphology) , based on scripts produced by the same group to whom the tests were administered. Prior to the presentation of the tests and the results and conclusions, there is a discussion of what constitutes vocabulary. This is introduced by a discussion of the dichotemy 'structure/lexis', primarily by reference to the writings on structuralism by Charles Fries - This discussion shows that the progress in vocabulary study is intimately related to the as-yet undeveloped state of investigations into the semantics of the language . There is a referenoe to the role of frequency-counts in vocabulary teaching with specific reference to Michael West's General Service List of English Words. In the absence of other prescribed standards of attainment in vocabulary, the General Service List serves as control for the tests , and is itself under examination as a possible major resource for vocabulary teaching. It is shown that structuralism has produced the instructional method known as 'audio- lingualism', which has gained wide credence, not least in the educational system through which the subjects of this study have passed. The contributions and defects of this method are discussed , with particular reference to its deleterious effect on vocabulary teaching. It is shown that vocabulary teaching becomes increasingly important in the later stages of language learning. There is reference to the current emphasis on ' commununicative' language teaching/learning, and it is shown that a major area of application is in the presentation of materials which embody an across-the-curriculum approach. The Pre- Tests are concerned only with the four major 'parts of speech ' and use only items from the General Service List ('G.S.L'). A particular feature is the development of tests based on the 'partial productivity of lexical rules' , which proved significantly effective in distinguishing between testees of high and low proficiency . The Final Tests, compiled from items which discriminated successfully in the Pre-Tests , are presented , and a Post- Final Test form of ultimately successful items is provided. There is a brief theoretical discussion of Error Analysis, and this is followed by the presentation of the categorization of lexical and morphological errors extracted from a corpus produced by the same group which provided subjects for the tests . There is comment on this categorization, which points to both the usefulness and shortcomings of such data . Amongst the conclusions and recommendations are the following: that vocabulary teaching has languished, both because of present inadequacies in semantic investigation, and because of the predominance of structuralism; that vocabulary teaching is important throughout , but particularly in the post-initial stages ; that word-counts (specifically the G. S. L.)have a valuable place in vocabulary teaching, as controls, prompts and suppliers of resource material ; that there is a wide range of proficiency amongst these subjects , even within the limits of a word-count such as the G.S.L. (the most frequent 2000 'words ' in English , with a samantic count, and related items formed by various processes) ; that this range of proficiency and the shortcomings shown are disturbing in teachers- in- training , who are also in their eleventh and twelfth years of formal instruction in English; that there is further cause for concern when it is remembered that their pupils will need English for success in a number of subjects , and will be instructed in English mainly by teachers. drawn from this group ; that there is some evidence of a relationship between vocabulary proficiency and the frequency of items in the G.S .L. (reinforcing the suggesting that the G.S .L. is a useful ' teaching tool ' ) ; that the categorization of errors shows that mastery of the · contents of the G. S. L. would , in theory , eliminate the great majority of errors attested in the categorization, and that mastery of even the most common areas of lexis and lexical formation cannot and should not be taken for granted; and that acquaintance with the contents of a word frequency-count , and with categorizations of errors , will sharpen teachers' perceptions as to the nature of their task and the directions in which vocabulary teaching should proceed.
- Full Text:
- Date Issued: 1981